naturalists’ quarterly advertiser. xi 
19 . PACKARD.—First Annual Report on the Injurious 
and Beneficial Insects of Massachusetts. 
Part I, 1871. I plate, many cuts . . 25 
20. Part 2, 1872. Many cuts ... 25 
21. Part 3, 1873. Many cuts ... 25 
22. “ Insects and their Allies .... 15 
23. “ New American Moths, Zygsenidse and 
Bombycidae ...... 10 
24. “ Transformation of the House-Fly. 
With fine Lithographic Plate illustrating the Anatomy . 30 
25. PACKARD.—Synopsis of the Thysanura of Essex 
Co., Mass., with descriptions of a few extralimital forms. 
Descriptions of New American Phaleenidse. 
On the Cave Fauna of Indiana. Three valuable 
papers in one.50 
26. SCUDDER.—A Systematic Revision of Some of 
the American Butterflies, with notes.35 
27. WALSINGHAM. —Directions for Collecting Micro- 
lepidoptera .. 15 
MICROSCOPY. 
1. BASTIAN’S Modes of Origin of Lowest Organisms. $125 
2. “ Beginnings of Life. 2 vols, l2mo . . 6 00 
3. BEALE.—How to Work with the Microscope. By 
L. S. Beale. 5th edition in press. 
4. CARPENTER.—The Microscope and its Revela¬ 
tions. By W. B. Carpenter. Illustrated, 12mo, cloth. 
London, 1875 5 50 
5. CLARK.—Mind in Nature; or the Origin of Life and 
the Mode of Development of Animals. Over 200 Illustra¬ 
tions. 8vo, cloth. (A most important work on the Anat¬ 
omy and Embryology of all Classes of Animals .) . . 4 00 
6. CLARKE.—Objects for the Microscope. 2 nd edition. 
L. Lane Clarke. Revised and enlarged. 1 vol., 12mo, 
cloth.1 75 
7. DAVIES.—The Preparation and Mounting of Mi¬ 
croscopic Objects. By Thomas Davies. 1 vol., 12 mo, 
cloth. 1 25 
This is the best book on Practical Microscopic work in 
the language. It gives full directions for mounting by all 
the various methods. Receipts for all the best mounting 
mediums, cements, varnishes, etc., with instructions for 
dissecting insects and plants, and a guide in the choice of 
parts best calculated to illustrate the structure of the same. 
