Being a popular introduction to the study of Entomology, and a treatise on Injurious and Beneficial Insects, with descriptions and accounts of the habits of Insects, their transformations, development and classification.

By A. S. PACKARD, Jr., M. D.,

Curator of Articulata at the Peabody Academy of Science, Lecturer on Entomology at Bowdoin College, and Entomologist to the Mass. State Board of Agriculture.

Containing 715 pages, 15 full page plates and 670 cuts in the text, embracing 1260 figures of American Insects. In a large octavo volume, printed on extra paper and in full cloth binding.

Third and Improved Edition. Price reduced to $5.00.

The Guide has already been introduced either as a text-book, or for reference, in Harvard University, Williams College, Dartmouth College, Antioch College, Massachusetts Agricultural College and other institutions in this country, and in Oxford and Cambridge Universities, England.

Published by the NATURALISTS' AGENCY, Salem, Mass.

We give a few of the large number of testimonials relating to the character of this work.

Not only does your book fully justify its title for its clearness and the concise presentation of a difficult subject, but it is emphatically a guide to the study of insects injurious to vegetation, owing to the constant reference it contains to topics pertaining to economic entomology. I will say more: I hold that your work ought, in connection with Harris's "Treatise on Insects Injurious to Vegetation," to which it is, as it were, the Key, to be introduced in all our Agricultural Colleges, as the best text-book of that kind now extant.—Extract from letter of Prof. L. Agassiz.

I have received Part ten of your Guide To the Study of Insects, which brings the whole work so successfully to its completion. After all the good things that have been said of it at home and abroad, any commendation of mine would be quite superfluous. I will, however, express my obligation for both the pleasure and instruction I have received in reading it.—Extract from letter of Prof. T. Wyman.

The first two parts are, we do not hesitate to affirm, the best things of the kind that our language possesses. We have seldom fallen on so thoroughly good a scientific treatise as the one whose features we have briefly sketched, and we can only conclude our notice of it by advising all our natural history readers to make its acquaintance. There is no work we should prefer to it as a book for the student, for it is a treatise which displays an absolute avoidance of mere compilation, and it is pervaded by such a tone of earnestness, and contains so many original observations, that the reader is inducted by it out of the usual book-land of idealism into the substantial region of actuality and fact.—Scientific Opinion, London.

Too often do we meet with a manual in which there is little more than a description of the external characters which nobody is satisfied with, because it is not full enough for the mere collector, and for the general reader is too dry. Packard's work has succeeded throughout in satisfying.

THE MAMMOTH CAVE AND ITS INHABITANTS,

Or Descriptions of the Fishes, Insects and Crustaceans

found in the Cave; with figures of the various species, and an account of allied forms, comprising notes upon their Structure, Development and Habits; with remarks upon subterranean life in general.

By A. S. PACKARD, Jr., and F. W. PUTNAM.

8vo, 62 pages, 2 steel plates and 14 woodcuts, full cloth binding and appropriate stamp in gold on each side.

Price $1.25 a Copy.

INSECT PINS AND CORK FOR INSECT BOXES.

Size of cork, 12×3-1/2 inches. Price, $2.00 for twelve pieces. Postage 6 cents. Large orders sent by Express.

INSECT PINS, 30 cents a hundred, $2.50 a thousand. Forceps for pinning insects, $1.35.

RECORD OF AMERICAN ENTOMOLOGY.

Edited by A. S. PACKARD, Jr.

A Year Book of Progress in American Entomology for 1868, 1869, 1870, 1871, 1872. Price of Parts for 1868 and 1869, 75 cents each. For 1870-72, 50 cents each; or the five to one address for $2.50.

IN PRESS.—"Check List of the Coleoptera of North America," prepared by Mr. G. R. Crotch. This will make an 8vo pamphlet of about 150 pages; nearly 100 pages are already printed. Address the Agency for further information.

A LARGE Number of Works on Entomological Subjects are for Sale at the Naturalists' Agency. Send for a list.

FLOWER OBJECT LESSONS;

Or First Lessons in Botany.

A FAMILIAR Description of a Few Flowers. From the French of M. Emm. Le Maout, Translated by Miss A. L. Page. This little work of 55 pages, illustrated by 47 woodcuts, has been translated for the purpose of placing within the reach of those interested in object teaching a manual that is most admirably adapted for the purpose, and is offered to parents and teachers with the belief that it fully supplies a gap in the literature of our country. Cloth Binding, Seventy-five Cents a Copy.

Proceedings of the American Association for the Advancement of Science.

FULL Sets of the Proceedings, 21 volumes for $31.50. Any single volume except Volume One may be had at $1.50 a copy. Volume One is only sold when a full set is ordered.

The publications of nearly all of the leading Societies and Scientific Institutions in the country are also for sale at the

NATURALISTS' AGENCY, Salem, Mass.

Send for full Catalogue giving titles and prices of a large number of books and pamphlets.

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Book Work of a Scientific character is made a specialty at the SALEM PRESS.

F. W. PUTNAM & CO., Proprietors,
Salem, Mass.