I have said that Mary and I think Argiope of the Silver Shield the most handsome spider we know. There are, however, other Argiopes to dispute the glory with our favorite; for example, a golden-yellow-and-black one and another beautiful silver-and-russet[Pg 85]
[Pg 86] one. Other people, too, may fancy other spiders; perhaps the little pink-and-white crab-spiders of the flower-cups, or the curious spiny Acrosomas and Gasteracanthas with their brilliant colors and bizarre patterns and shape. Others may like the strawberry Epeira, or the diadem-spider, or the beautiful Nephilas. There are enough kinds and colors and shapes of spiders to satisfy all tastes. But we like best and admire most the long-legged, agile, graceful Argiopes, and particularly her of the silver shield. Her full, firm body with its flat, shield-shaped back, all shining silver and crossed by staring black-and-yellow stripes, the long tapering legs softly ringed with brown and yellow, the shining black eyes on their little rounded hillock of a forehead, and the broad, brown under body with eight circular silver spots; all go to make our Argiope a richly dressed and stately queen of spiders. But the royal consort—O, the less said of him, the better. A veritable dwarf; insignificant, inconspicuous and afraid for his life of his glorious mate. How such a queen could ever—but there, how tiresome, for that is what gets said of most matches, royal or plebeian.

Mary and I brought Argiope in from her home in the cypress-tree and put her in a fine, roomy, light and airy cage, where she could live quietly and unmolested by enemies, and where we could see to it that she should not lack for food. There are many of the small creatures with which we get acquainted that do not object at all to being brought into our well-lighted, well-ventilated, warm vivarium—that means live-room. Creatures of sedentary habits, and all the web-making spiders are of course that, ought not to object at all and usually do not seem to. For they get two things that they cannot be sure of outside: protection and plenty of food. Argiope seemed perfectly content and settled right down to spinning a glistening new web, a marvel of symmetry and skillful construction, in her roomy cage, and in a day or two was seated quietly but watchfully on the broad-banded hub in the center, with her toes on her telegraph lines, ready for good news. It was, of course, our duty to see that she was not disappointed.

The message she wanted was from some struggling fly fastened anywhere in the broad expanse of web. So we tossed in a fly. It buzzed about a moment, then blundered into the web which it shook violently in its struggle to escape. Argiope rushed at once out upon the web.

"How can she run about on the sticky web without getting caught, too?" interrupts Mary.

I think a moment, then with some dignity reply: "Pretty soon, please, Mary."

Argiope, I repeat, rushed at once out upon the web, seized the fly in her jaws and ran back to the hub with it, where she appeared to wet it all over, squeeze it into a ball and then proceed to feed upon it, holding and manipulating it skillfully all the time in her jaws. Evidently Argiope was very hungry, for as you will see, this is not her usual way of taking care of her prey.

"Now, Mary, what was it you asked?"

"Oh, just how the spider can run around so fast on the web without sticking to it and getting caught or tearing it all to pieces."

"Ah,—ah, yes. Well, Mary, I don't know! that is, exactly; or, well not even very close to exactly. But she does it, you see."

"Yes, I see," said Mary, demurely, and—can it be that Mary is slightly winking one eye? I do hope not.

"Of course you know, Mary, that the web is made of two kinds of silk or rather two kinds of lines? Oh, you didn't know?" Mary has shaken her head.

"Well it is," I continue, with my usual manner of teacher-who-knows somewhat restored again. "The foundation lines, the radii and a first set of circles are all made of lines without any sticky stuff on them. As you see"—and I touch my pencil confidently to a radius, with the manner of a parlor magician. "Then the spider, on this foundation, spins in another long spiral, the present circles of the web, which is liberally supplied with tiny, shining droplets of viscid silk that never dries, but stays moist and very sticky all the time. This is the true catching part of the web."

"We surely must watch her spin a web sometime," breaks in eager Mary.

"We certainly must," say I, and continue. "Now perhaps when Argiope runs out on the web from her watching-place at the hub, she only puts her long delicate feet on the unsticky radii. Or perhaps her feet are made in some peculiar way so that they do not stick to the circles. As a matter of fact, a spider's foot is remarkably fashioned, with curious toothed claws, and hosts of odd hairs, some knobbed, some curved and hook-like, and some forming dense little brushes. But after all, Mary, the truth is, I don't know really how it is that spiders can run about over their webs without getting stuck to them."

After my long discursus about web-making and spider's feet, it seemed time to give Argiope another fly. Indeed her bright little black eyes seemed to Mary to be shining with eagerness for more fly, although she still had the remains of the first one in her jaws—gracious, Argiope's jaws, please, not Mary's!

So we tossed in another fly. We hope you won't think this cruel. But flies are what Argiope eats, and if she was out in the garden, she would be catching them, and, what is worse, they would not be the disgusting and dangerous house-flies and bluebottles that we feed her, but all sorts of innocent and beautiful little picture-winged flower-flies and pomace-flies and what not. House-flies and stable-flies and bluebottles are truly dangerous because they help spread human diseases, especially typhoid fever. So if we are to live safely they should be killed. Or, better, prevented from hatching and growing at all.

So we tossed in another fly. Argiope immediately dropped the nearly finished first fly into the web, ran out to the new one and pounced on it, seizing it with her fore legs. Then she doubled her abdomen quickly underneath her and there issued from the spinnerets at its tip a jet, a flat jet of silk, which was caught up by the hind feet and wrapped around the fly as it was rolled over and over by the front feet. She tumbled it about, all the time wrapping it with the issuing band of silk, until it was completely enswathed. Then she left it fastened in the web, went back to the hub, and resumed her feeding on the first fly. But soon she finished this entirely, dropped the wreck out of the web and went out and got the second fly, bringing it back to the hub to eat.

"But why," asked Mary, "does Argiope wrap the fly up so carefully in silk? Why not just kill it by biting, and then leave it in the web until she wants it?"

"Perhaps," I answer, "she wants to make it helpless before she comes to close quarters with it. You notice she holds it away from her body with her fore feet and pulls the silk band out far with her hind feet so that her body does not touch the fly at all while she wraps it. Perhaps she is not sure that it isn't a bee or some other stinging insect. It buzzes loud enough to make me think it a bee."

So Mary and I decided to try some experiments with our Argiope to find out, if possible, first, if she could tell a bee from a fly, and second, if so, whether she treated it differently, and third, why she wraps her prey up so carefully before coming to too close quarters with it. We feel quite proud of these experiments because we seemed to be doing something really scientific; and we know that Experimental Zoology, that is, studying animals by experimenting with them, is quite the most scientific thing going nowadays among professional naturalists. So here are our notes exactly as we wrote them during our experimenting. This is, of course, the correct manner for publishing real scientific observations, because it gives the critical reader a chance to detect flaws in our technique!

OUR NOTES ON THE BEHAVIOR OF ARGIOPE

"Nov. 18, 4:45 p.m.; released a fly in the cage. The spider pounced upon it, seized it with fore and third pair of legs, threw out a band of silk and enswathed it, tumbling it over and over with her hind feet about thirteen times, hence enswathed it in thirteen wrappings of silk. The fly was then disconnected from the web, the spider making but little attempt to mend the gap. It was carried to the hub and eaten. While the feast was going on, a honey-bee [with sting extracted; we didn't want to run any risks with Argiope!] was liberated in the cage. As soon as it touched the web, the spider was upon it, throwing out a band of silk in a sheet a quarter of an inch broad. ['Drawing out' would be more accurate, for the spinnerets cannot spurt out silk; silk is drawn out and given its band character by lightning-like movements of the comb-toothed hind feet.] With her hind legs Argiope turned the bee over and over twenty-five or twenty-six times, thus enswathing it with twenty-five or twenty-six wrappings of the silken sheet.

"No sooner was the bee enswathed than a second bee was liberated in the cage and caught in the web. This was treated by the spider like bee No. 1.

"Nov. 20, 8:15 a.m.; Argiope perfectly still in center of hub, feeding on bee No. 2. The only thing that reveals the feeding is a slight moving of the bee's body as the juices are sucked up. Remains of bee No. 1 dropped to the bottom of the cage.

"Fed all day, 8:15 a.m. to 5 p.m., on bee No. 2.

"At 2:30 p.m., a box-elder bug, which is very ill-smelling, was thrown into the web. Argiope did nothing for three minutes, then went out on the web to it and wrapped, making five complete turns; then went away. Probably not hungry, as she has had two bees and a fly in three days.

"Nov. 21, 8:15 a.m.; box-elder bug finished during last night. Old web replaced by a new one with twenty-nine radii, eleven complete spirals and several partial spirals. The hub is formed of fine irregular webbing about an inch and a half in diameter, without the viscid droplets that cover the spirals. An open space of about a half-inch intervenes between the hub and the beginning of the spirals.

"4:30 p.m.; liberated a fly in the cage. Argiope pounced upon it and began to eat immediately, not taking time or trouble to enswath it.

"While the fly was being devoured, we liberated a strong-smelling box-elder bug in the cage. It flew into the web. Argiope, by a quick movement, turned on the hub toward the bug and stood in halting position for eight seconds, then approached the bug slowly, hesitated for a second or two, then wrapped it about with five wrappings, halted again, and finally finished with five more wrappings. The bug was then attached to the web where it had first touched, the spider passing back to the center and resuming her meal.

"When the fly was finished, Argiope walked over to the bug, grasped it in her mandibles, walked up to the hub, turned herself about so that her head was downward, manipulated the bug with her fore and third pair of feet until it seemed to be in right position for her with reference to the hub of the web, and began to feed.

"5 p.m.; bee liberated in cage with sting not extracted. Argiope leaped instantaneously to the spot where it was caught, enswathed it with great rapidity thirty-seven times, then bit at it, and enswathed it five times more, making forty-two complete wrappings in all, then left it fastened in the web and resumed feeding upon the bug. All the time she was wrapping it, Argiope kept her body well clear of the bee's body, the spinnerets being fully one-half an inch from the bee, making the broad band of issuing silk very noticeable. In biting it, which she seemed to do with marked caution, she of course had to bite through the silken covering.

"A few minutes later a second bee, with sting, was liberated in the cage, caught in the web and rapidly pounced on by the spider. As before, she turned it over and over with great rapidity, using apparently all of her legs. She enswathed it fifty times, bit it, and then wrapped it with five more silken sheets, making fifty-five wrappings in all. Leaving it hung to the web, she went back to the bug.

"Before Argiope had reached the bug, bee No. 3 was caught in the web at the exact spot where bee No. 2 was hung up. In its efforts to disentangle its feet, it shook the whole web violently. In spite of the violent vibration of the web, Argiope pursued her course to the bug at the hub of the web, adjusted herself with head downward, and resumed feeding.

"Query: Did Argiope think the web-shaking due to futile struggles of the well-wrapped bee No. 2, and hence needing no attention?

"Vibration of the web continued. After several seconds had elapsed, Argiope seemed suddenly to realize that her efforts were called for out on the web, for she pounced down as rapidly as before and rolled and tumbled both bees together, enswathing both in the same sheet of silk, never stopping until she had given them fifty-five wrappings. After biting twice, she wrapped them with five more turns, bit again, and wrapped again with seven more turns, making sixty-seven in all. Argiope then returned to her bug.

"Query: Does Argiope distinguish bees from flies?

"Further query: Does Argiope distinguish bees with stings from bees with stings extracted?

"Nov. 22, 9:45 a.m.; Argiope feeding at hub on bees Nos. 2 and 3 introduced into cage yesterday afternoon. With her right second leg she holds taut a line connected with bee No. 1.

"10:25 a.m.; packet dropped to the bottom of the cage, the juices of only one of the bees having been sucked out. The web is constructed at an angle so that anything dropped from the center falls free of it.

"5 p.m.; began feeding again on bee No. 1.

"Nov. 23, 9:30 a.m.; another bee released in cage, caught in web and enswathed approximately thirty turns by Argiope.

"Nov. 25, 8:30 a.m.; the web has been destroyed during the night.

"Nov. 26, Argiope has made an entirely new web.

"Nov. 30, 2 p.m.; gave Argiope a bee with sting. It was wrapped forty-seven times, but not so expeditiously as has been her wont. Later another bee was liberated in the cage, caught and wrapped about forty-five times.

"Dec. 2, 11 a.m.; the body of a live bee was bathed in fluid from the freshly crushed body of a box-elder bug [very malodorous], and the bee liberated in Argiope's cage, and soon caught in the web. The bee was not very lively and did not shake the web violently, but Argiope rushed to it without hesitation, wrapped it with twenty-five turns of silk and returned to the hub of the web.

"Dec. 3; Argiope stayed all day in the upper part of the web, on foundation lines, with head downward.

"Dec. 5; yesterday Argiope moved down to her normal place on the hub. To-day she is on the hub, but in reversed position [head up], and with legs bent and limp, not straight out and stiffened as usual.

"Dec. 6; Argiope hung all day from foundation lines of upper part of web, in reversed position [head up], with legs limp and bent.

"Dec. 7; Argiope hanging by first and second right legs, from upper part of web; barely alive.

"Dec. 8; Argiope dead."