Volume 11 — Journal of Entomology and Zoology—Advertising Section

The Journal of Zoological Research

Edited by WALTER E. COLLINGE, M. Sc., F. L. S., F. E. S. The Gatty Marine Laboratory The University, St. Andrews, Scotland

The subject matter is strictly confined to original zoological research—systematic and anatomical. Fully illustrated by lithographic plates and text figures.

Each volume will consist of 4 parts, price $5.

All subscriptions should be forwarded to Messrs. Dulau & Co., Ltd. 37 Soho Square, London, W., England

GRIFFITH Incubators

A simple, well constructed bacteriological incubator

GAGE—The Microscope

An Introduction to Microscopic Methods and to Histology

By SIMON H. GAGE. Twelfth Edition. Entirely rewritten, and with many new illustrations. Price, postpaid, $3.00.

This work aims to give help to everyone who uses the microscope, whether he is a beginner or an advanced worker.

COMSTOCK—A Manual for the Study of Insects

By JOHN HENRY COMSTOCK, Professor of Entomology in Cornell University, and ANNA BOTSFORD COMSTOCK, member of the Society of American Wood-Engravers. 8vo. cloth, IX. +701 pages, 797 figures in the text, and six full page plates. Nearly all of the figures were engraved especially for this work. Postpaid $4.07; net $3.75. This hand-book is designed to meet the needs of teachers in the public schools and of students in high schools and colleges.

NEEDHAM—General Biology

A book of outlines and practical studies for the general student

By JAMES G. NEEDHAM, Professor of Limnology and General Biology in Cornell University. Cloth 8vo. XIV. +542 pages; 288 figures, mostly original. Postpaid $2.00.

This book is expressly designed to help the general student obtain a comprehensive grasp of the principles of biology.

NEEDHAM & LLOYD—The Life of Inland Waters

A Text-Book of Freshwater Biology

By JAMES G. NEEDHAM, Ph.D., Professor of Limnology and General Biology in Cornell University, and JOHN T. LLOYD, A.B., Assistant in Limnology in Cornell University.

This book is a broad presentation of the field of fresh-water biology, primarily in its scientific aspects, also in its relation to commercial, civic, aesthetic and public health interests of man. There is no book in the English language covering the field. Copiously illustrated with photographs from Nature. 438 pages; 244 figures. Price $3.00.

GAGE—Optic Projection

By SIMON HENRY GAGE, Professor Emeritus of Histology and Embryology in Cornell University, and Henry Phelps Gage, Ph. D.

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.

RILEY—Handbook of Medical Entomology

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.

Send for Descriptive Circular

The Comstock Publishing Company Cornell Heights, Ithaca, N. Y.

THE "ALL GLASS MOUNT"

for Lepidoptera and other insects

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.

Entomological News

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.

To new subscribers, $1.90; Renewals, $2.00; payable in advance. Single copies 25 cents. Address ENTOMOLOGICAL NEWS 1900 Race Street, Philadelphia, Pa.

CLASS WORK MATERIAL CAN BE PROCURED AT ANY TIME OF THE YEAR FROM C. S. BRIMLEY, Zoologist

1135 Newberne Avenue RALEIGH, N. C., U. S. A.

Twenty-one years' experience Price List on Application

The Journal of Parasitology

A Quarterly Devoted to Medical Zoology

This journal will be a medium for the prompt publication of briefer papers and research notes on animal parasites. Emphasis laid on the morphology, life history and biology of zooparasites and the relations of animals to disease.

Subscription, $2.00 a Volume Managing Editor, HENRY B. WARD; Univ. Illinois, Urbana, Illinois

Do Business by Mail

It's profitable, with accurate lists of prospects. Our catalogue contains vital information on Mail Advertising. Also prices and quantity on 6,000 national mailing lists, 99% guaranteed. Such as:

War Material Mfrs.Wealthy MenFly Paper Mfrs.

Cheese Box Mfrs.Ice Mfrs.Foundries

Shoe RetailersDoctorsFarmers

Tin Can Mfrs.Axle Grease Mfrs.Fish Hook Mfrs.

DruggistsRailroad EmployeesFeather Duster Mfrs.

Auto OwnersContractorsHotels

Write for this valuable reference book. Ross-Gould, 1027H Olive Street, St. Louis.

Ross-Gould Mailing Lists St. Louis

Pomona College

Located in one of the most healthful and beautiful parts of the west coast. The mountains reach an elevation of ten thousand feet within a few miles of the college and these with the nearby ocean afford many special advantages for the study of things not in books. Special advantages are afforded by the fact that the college limits its attendance, the freshman class being restricted to two hundred applicants. The success of the college is particularly indicated by the large proportion of the graduates who proceed to advanced work in the large universities. In addition, well-manned departments of music and art afford exceptional advantages.

For further information, address

Secretary of Pomona College Claremont, California

Transcriber's Notes

Page 64: Changed * * * to ... (preferred form for ellipsis). Originally: This * * * is readily overcome by the frequent Page 64: Changed "placd" to "placed". Originally: surface of the book on which it was placd, Page 68: Changed "X" to "×". Originally: cells (10 mm. X 3.5 mm.) Page 70: Changed "chitinizd" to "chitinized". Originally: Changed area of microscopic chitinizd spicules, Page 71: Changed "Lengh" to "Length". Originally: Pupa.—Lengh, 9.1-12.8 mm. Page 75: Retained "molloscs", as a possible spelling variant for "molluscs". However, it may be a typo. Originally: forms are grouped among the simplest of the molloscs. Pages 75, 76: Retained "Stempel" and "Stempell" spelling variations. Page 76: Changed "once" to "one". Originally: the pedal ganglion at once place seems to be made up Page 76: Changed all instances of "X" to "×" to indicate magnification.