24 
THE NATURALISTS BUREAU. 
6. HARRIS.—Insects Injurious to Vegetation. 8vo. 
Numerous plates, uncolored $4.00 Colored . . . 6 00 
7. EDWARDS.—The Butterflies of North America. 
By W. H. Edwards. Eirst Series, containing 50 plates, 
figures life-size, carefully colored from nature, with de¬ 
scriptive letterpress. Half morocco, gilt . . . . 30 00 
8. The Same. Second Series. Issued in Parts, containing 
Eive Plates each. Parts I.-VI. Price per part . . . 2 5# 
Without knowing more of your doings than appears on 
the face of your publication, I was so much struck by the 
beauty and thoroughness of your Lepidoptera that I re¬ 
quested Dr. Hagen to write to you and offer you anything 
from our collections that might be desirable in the prose¬ 
cution of your work.—Louis Agassiz. 
Part 9 of your “ Butterflies” is one of the most beautiful 
works which I have seen. Your careful observations on 
the dimorphism or rather trimorphism of Papilio Ajax 
strike me as most remarkable and interesting. — Charles 
Darwin. 
No American work of the kind has ever been printed 
containing in its pages such satisfactory illustrations of the 
various species.— Nature. 
0. EMERTON.—The Structure and Habits of Spiders. 
By J. H. Emerton. The object of this book is to give a 
plain account of the best known habits of Spiders, and their 
Anatoiny and Classification. Fully illustrated, 12mo, cloth 1 50 
10. PACKARD, A. S., Jr.-Salt Water Insects . . 15 
11. PUTNAM’S and PACKARD’S Notes on Humble 
Bees, etc. Wild Bees of New England, their Parasites, 
etc., with a plate. Pamphlet, 8vo. 1865 .... 75 
12. WOOD, Horatio C.—Phalangese of United States. 
1868. Cuts of most of the species.1 50 
13. HARRIS, T. W.—Remarks on Scarabseus Goliatus, 
and other African Beetles allied to it.10 
14. WILDER, B. G.—Researches and Experiments on 
Spider’s silk. 1866. Cuts ....... 50 
15. EBELL.—Insects and How to Observe them . . 30 
16. HENTZ.—Description of N. A. Spiders. Many fine 
plates illustrating all the known Genera . . . . 3 00 
Supplement to the above.30 
17. Insect Hunter’s Companion. A handbook for Insect 
collectors, Lepidoptera and Coleoptera. 12mo ... 75 
18. ALLEN, J. A.—Poray of a Colony of Formica San- 
guinea upon a Colony of Black Ants. 1868 ... 10 
19. PACKARD.—First Annual Report on the Injurious 
and Beneficial Insects of Massachusetts. 
Part 1, 1871. 1 plate, many cuts 
25 
