This work of over 700 pages and with over 400 figures is of especial interest to workers in all fields of Biology in that it deals especially with the use of the Projection Microscope for demonstrations and for drawing. It also gives the fundamental principles of all the forms of projection. A 16-page circular will be sent on request. Postpaid, $3.00.
By WM. A. RILEY, Ph. D., Professor of Insect Morphology and Parasitology in Cornell University and O. A. JOHANNSEN, Ph. D., Professor of Biology in Cornell University.
A concise account of poisonous, and disease-carrying insects and their allies, including descriptions and illustrations of the principal species, with keys for their determination, and method of control. Bound Library Buckram, medium 8vo. Nearly 375 pages. Price $2.00 net.
The Comstock Publishing Company Cornell Heights, Ithaca, N. Y.
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[Illustration: _Odontolabis wollastoni, Java_]
We are able at last to offer our customers an all glass mount that we believe comes nearer to meeting the requirements of museums and private collectors than any previously put on the market.
No cut can properly show this mount, which must be seen to be appreciated. Write for Circular 192, which describes fully what we are offering.
When in need of Entomological supplies remember that we have the best insect pins on the market and that our hand made Schmitt insect boxes with three ply tops and bottoms are unsurpassed. Catalogue No. 33 free on application.
Prompt shipments can be made from our large stock of United States and exotic insects of all orders. We also prepare 150 different metamorphoses of beneficial and injurious insects. Pupae now on hand are listed in circular No. 198. Other circulars and price lists free upon request.
Ward's Natural Science Establishment 84-102 College Ave. Rochester, N. Y.
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A forty-eight page illustrated magazine, published monthly except August and September, devoted to the study of INSECT LIFE. It contains a list of the titles of the current Entomological Literature, and also articles by the leading Entomologists in the United States and Canada. Valuable information for the beginner, the economic entomologist and the systematist.