Anatomical Models; Sponges; Corals and other invertebrates.

Catalogues and Price Lists in all departments sent free on request.

Recent Catalogues and Circulars:

P. 29. Microscope Slides.
P. 26. Comparative Osteology.
P. 125. Life Histories of Insects.
P. 115. Collections of Fossils.
P. 116. Museum Cases.
P. 127. Histology.
P. 137. Botanical Mounts.
P. 134. Complete Trilobites.
P. 106. Lull Restorations and Models.

We have the largest and most complete stock of any dealer in the world.

Fifty Years of Service.

Address: Ward's Natural Science Establishment,
84-102 College Ave., Rochester, N. Y.

Journal of EconomicBiology

Edited by Walter E. Collinge, M. Sc., F. L. S., F. E. S.

Contains articles treating of all branches of Economic Biology, Entomology,
Parasitology, Mycology, etc. Fully illustrated by
lithographic plates and text figures. A few sets of
Vols. 1-8 still remain, price $5 each. Volume 9,
now in course of publication, will consist
of four parts, price $5.

All editorial communications should be addressed to Walter E. Collinge,
8, Newhall Street, Birmingham, and all subscriptions to

Messrs. Dulau & Co., Ltd.
37 Soho Square, London, W., England

GRIFFITH

Incubators

A simple, well constructed bacteriological incubator

Butterfly-Hunting in Many Lands

Notes of a Field Naturalist

By George B. Longstaff, M. A., M. D.(Oxon.),

late Vice-President Entomological Society,
London. To which are added Translations
of Papers by Fritz Müller on the
Scent-Organs of Butterflies and
Moths; with a Note by E. B. Poulton,
D. Sc., F. R. S. With 16 Plates
(7 colored). 8vo, pp. xx+1+728.
$7.00 net. (Postage 22 cents.)

"Interesting descriptions of the generalfeatures of the countries visited,their history, geography, flora and inhabitants... will appeal as much tothose interested in travel as to thenaturalist, as it is delightful reading....It is the kind of book that helpsmake naturalists and we can't have toomany of them.... The Appendix consistsof translations of valuable papersby Fritz Müller, and is very useful andindispensable for those not understandingthe original language. Thereis much to praise and nothing to condemnin the work, and it is a valuableaddition to the popular works on naturalhistory and travel."—EntomologicalNews.

LONGMANS, GREEN & CO.

443 Fourth Ave.

New York