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BY S. W. WILLISTON.

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PART II.[11]

CONOPS.

1.	First basal cell hyaline	2
	First basal cell clouded throughout	6
2.	Third joint of the antennae as long as the first two together;
	small species	parvus, n. sp.
	Third joint of the antennae but little if any longer than the
	second joint	3
3.	First posterior cell hyaline	4
	First posterior cell more or less clouded	5
4.	Cheeks yellow	angustifrons, n. sp.
	Cheeks black	ornatus, n. sp.
5.	Face black in ground-color	argentifacies, n. sp.
	Face yellow, large species	grandis, n. sp.
6.	Red species; front red	rufus, n. sp.
	Black species; front black	7
7.	Face and cheeks black in ground-color	magnus, n. sp.
	Face and cheeks yellow	inornatus, n. sp.

1. Conops magnus, n. sp.

Female. Front black, shining, the vertical callosity somewhat reddish. Face and cheeks yellowish brown, the orbits silvery pollinose. Antennae brownish black; second and third joints subequal, first joint about two-thirds the length of the second; third joint of the style with a long bristly extremity. Thorax shining black; pleurae lightly whitish pollinose. Abdomen deep black, opaque; lightly whitish pollinose posteriorly; ventral process of the fifth segment large. Wings deep brown in front, extending through the two basal cells, and the basal part of the discal cell; outer part of the first posterior cell subhyaline, as also behind the streak corresponding to the spurious vein of the Syrphidae. Legs black; base of the femora, of the tibiae, and of the tarsi, somewhat yellowish.

Length 21-24 millimeters. Six specimens, Chapada, H. H. Smith.

2. Conops grandis, n. sp.

Female. Front black, the lower margin of the vertical callosity reddish; just below the callosity opaque, elsewhere shining. Antennae black; the second and third joints of nearly equal length; the first joint about two-thirds the length of the second joint; style with a long bristly extremity. Face and cheeks light yellow, the orbital margins of the former silvery or light golden pollinose. Thorax black, the mesonotum shining, the pleurae lightly whitish pollinose. Abdomen deep black; posteriorly lightly pollinose. Wings brown in front; first posterior cell and the space behind the streak corresponding to the spurious vein of the Syrphidae in the first posterior cell, pure hyaline; outer part of the first posterior cell subhyaline; a brown streak in front of the fifth vein. Legs black; the tibiae and basal joints of the tarsi in large part reddish or yellowish; pulvilli light yellow; ventral process of the fifth segment extraordinarily large; seventh segment as long as the three preceding together.

Male. Abdomen in ground-color black, either wholly so, or more or less, or rarely entirely, red; the ground color, save at the base, however, is almost wholly obscured by reddish brown pollen.

Length 19-23 millimeters. Six specimens, Chapada, H. H. Smith.

3. Conops rufus, n. sp.

Male, female. Head red; face in the depression yellow, on the sides with a silvery sheen. Antennae black; first joint red, more than half of the length of the second joint; second joint sometimes reddish at the base; third joint about as long as the second joint, stout; third joint of the style suddenly attenuated into a moderately long bristly extremity. Thorax red; mesonotum with a median black stripe, and an oval, more or less distinct spot on either side; a golden pollinose spot on the inner side of each humerus. Abdomen red, lightly pollinose, the median segments more or less black; ventral process in the female large; the sixth segment in the same sex about as long as the two preceding together. Legs red, the tarsi a little darker, the pulvilli and the ungues, save their black tip, yellow. Wings brown in front, the brown extending to the fifth vein in the basal part of the discal cell; the space behind the spurious vein in the first posterior cell hyaline; the outer part of the same cell subhyaline.

Length 16-17 millimeters. Two specimens, Chapada, H. H. Smith.

4. Conops angustifrons, n. sp.

Male. Front much longer than wide; black, shining at the vertex and below; an opaque band below the vertical callosity. Antennae black, the third joint somewhat reddish below towards the base; the first joint about half of the length of the third joint; third joint distinctly shorter than the second, rather broad at the base; style small, attenuate. Face, cheeks and the lower part of the occiput wholly light yellow. Thorax opaque black; a whitish pollinose spot on the inner side of each humerus; vertical pleural pollinose spot not distinctly limited above; a row of dorso-pleural, at least two prescutellar, and four scutellar, well-developed bristles. Abdomen subopaque black; second segment yellow at the base; sixth segment opaque golden yellow pollinose. Wings brownish before the third longitudinal vein, the first basal and the first posterior cells wholly hyaline; a streak before the fifth vein. Legs deep brown; the base of all the tibiae, the large pulvilli, and the claws (except their tips) yellow.

Length 12 millimeters. One specimen, Chapada, H. H. Smith. This species is peculiar in its narrow front, bristles of the thorax, and hyaline first posterior cell.

5. Conops nobilis, n. sp.

Female. Head black; front, below the vertical callosity, except a crescentic space above the base of the antennae, opaque; face, on the sides and in the depression, with a conspicuous, light yellowish silvery reflection; in an oblique light from above the ground-color wholly concealed. Antennae black; the reddish first joint about two-thirds the length of the third joint; the third joint about two-thirds of the length of the slender second joint; third joint of the style with a short bristly extremity. Thorax black, lightly pollinose, opaque; on the front margin, and near the humeri, velvety; in the middle in front distinctly whitish when seen from behind. Abdomen black, subshining; second segment deep opaque black, save on the anterior part, where it is whitish pollinose; ventral process of the fifth segment small. Legs black; the tarsi and claws (save their extreme tips) light yellow; pulvilli very large, yellow; the tarsi dilated. Wings unequally brown in front, scarcely extending beyond the third vein, save in the first posterior cell; the costal cell and the outer part of the wing in front of the third vein of a lighter color.

Length 12 millimeters. One specimen, Chapada, H. H. Smith.

6. Conops inornatus, n. sp.

Male. Front black, shining, the vertical callosity reddish. Face yellow, with golden pollen on the sides extending up on the lower part of the front. Cheeks wholly yellow. Thorax black, shining, lightly pollinose; margins of the thorax and of the scutellum with moderately large bristles. Abdomen slender, black, shining; the narrow hind margins of the third and fourth segments, the fifth on the sides and behind, and the sixth nearly wholly, light golden pollinose. Legs brown; base of tibiae yellow; basal joints of the tarsi yellowish. Wings subhyaline, without distinct picture, though the color is more intense in front; yellow in the costal cell.

Female. Wings distinctly brown before the third vein and in the basal cells and proximal portion of the discal cell. Abdomen diffusely whitish pollinose behind; the second segment largely reddish; ventral process of the fifth segment small.

Length 10 millimeters. Two specimens, Chapada, H. H. Smith.

7. Conops ornatus, n. sp.

Male. Vertical callosity reddish; below it an opaque black band, connected in the middle with a V-shaped spot about the base of the antennae; the front elsewhere, and the face for the greater part, light yellow, the sides of the latter with a broad silvery sheen. Cheeks black. Antennae red; the first joint a little shorter than the third joint; second joint about twice the length of the first; style short, thick. Thorax black, opaque; near the humeri and behind, as also on the scutellum, thickly golden pollinose; pleurae diffusely pollinose. Abdomen opaque black; the hind margin of the first three segments, and the remainder of the abdomen, save spots on the sides of the fourth and fifth segments, thickly light golden pollinose. Legs reddish brown, the base of the tibiae and the basal joints of the tarsi yellowish. The brown of the wings extends to the third vein and through the middle of the first posterior cell; costal and subcostal cells lighter colored.

Length 11 millimeters. Two specimens, Chapada, H. H. Smith.

8. Conops parvus, n. sp.

Female. Closely allied to C. sylvosus Williston, but differs in the lighter colored antennae and their more elongated third joint, which is as long as the first two joints together; in the wings being wholly grayish hyaline, save a quadrate brown spot in front a little beyond the middle; and in the lighter colored legs and abdomen. The proboscis is as long as the antennae; the legs are brown or brownish yellow.

Length 8 millimeters. Two specimens, Chapada, H. H. Smith.

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Explanation of Plates.

Plate I. Skull of Pteranodon sp., one-fifth natural size.

Plate II. Left front paddle of Clidastes velox Marsh, two-thirds natural size. C, coracoid; S, scapula; H, humerus; I, first digit; V, fifth digit.

Plate III. Left hind paddle of Clidastes velox Marsh, two-thirds natural size. Il, ilium; P, pubis; Is, ischium; F, femur; T, tibia; Fb, fibula; I, first metatarsal.

Plate IV. Right front paddle of Clidastes Westii Williston, one-third natural size. S, scapula; C, coracoid; H, humerus; R, radius; U, ulna; I, IV, first, fourth digits.

Plate V. Right hind paddle of Clidastes Westii Williston, one-half natural size.

Plate VI. Eighteenth dorsal vertebra of Clidastes Westii Williston, natural size. Fig. 1, centrum from behind; fig. 2, from below.

Plate VII. Fig. 1, Microdon megalogaster Snow; fig. 2, Brachyopa cynops Snow; fig. 3, Syrphus ruficauda Snow; fig. 4, Callicera montensis Snow; fig. 5, Tropidomyia bimaculata Williston; fig. 6, Rhingiopsis rostrata Roeder; fig. 7, Ancanthina hieroglyphica Wiedemann.

Plate VIII. Melitera dentata. Adult, silken cocoon and outer layer of dirt-masses held together by silken threads; larva (shaded); larva in outline showing position and number of tubercled hairs; hind wing of adult showing venation.

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PLATE VII.

• Fig. 1, Microdon megalogaster Snow.
• Fig. 2, Brachyopa cynops Snow.
• Fig. 3, Syrphus ruficauda Snow.
• Fig. 4, Callicera montensis Snow.
• Fig. 5, Tropidomyia bimaculata Williston.
• Fig. 6, Promerisana nasuta Macq.
• Fig. 7, Ancanthina hieroglyphica Wiedemann.

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PROSPECTUS.

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University of Kansas,
Lawrence.

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