Entomological Forceps. 



No. 2 Half Size. 



No. i, Price, Nickel Plated, each $2.50 \ No. 2, Price, Nickel Plated, each 11.50 



Sent by mail on receipt of price. 

 DISINEECXIKJG COKES FOR ENTOMOLOGICAL. CABINETS. 



Price $1.00 per 100. Postage 10 cents. 

 Instruments of all kinds for Naturalists made to order. 



RECORD BOOKS. 



These books are ruled in columns with appropriate headings, and contain 

 200 pages 12 x 10 inches, having room for 4,600 entries. Bound in cloth. Suitable 

 also for recording collections of birds, etc. Price each, $2.00. 



BLAKE & CO., 55 N. Seventh Street, Philadelphia. 



American Spiders and their Spipingwork, 



A Natural History of the Orbweaving Spiders of the United States, 



WITH SPECIAL REGARD TO THEIR INDUSTRY AND HABITS, 

 By HENRY C. McCOOK, D. D. 



The author, who is necessarily the publisher also, announces that the first 

 volume of the above work is ready to be delivered to subscribers. 



The price will be $30 for the set of three volumes, and the work will be sold 

 only to subscribers. Payment is expected for each volume ($10) as it is delivered. 

 No volume will be sold separately. The several volumes will be mailed at the 

 publisher's expense, bound in stout cloth suitable for ordinary library use, but 

 with uncut edges for the accommodation of those who wish special binding. 



"The Author's Edition" is strictly limited to /a f o hundred and fifty copies, 

 which will be numbered consecutively in the order of subscriptions, as received. 



The first two volumes are devoted to a description of the industry and 

 Habits of Orbweaving spiders, both separately and in their relations to the 

 spinning economy of other Aranead Tribes. The first volume treats particularly 

 of Snares and Nests. The second volume will treat of the Cocooning Industry. 

 Maternal Instincts and General Habits. 



These volumes are liberally illustrated by drawings from Nature, the first 

 volume containing three hundred and litty-tour figures. The third volume will 

 be devoted to descriptions of the Orbweaving fauna of the United States, ac- 

 companied by a large number of lithographic plates, painted by hand in the 

 colors of Nature. All business communications and subscriptions may be ad- 

 dressed directly to the author, or to "American Spiders and their Spiningwork," 

 Academy of Natural Sciences, Logan Square, Philadelphia. 



TAXIDERMIST AND DEALER IN ENTOMOLOGICAL SUPPLIES. 



Fine Carlsbader Insect 

 Pins a specialty. Price- 

 list sent on application. 

 78 Ashland Place, 

 Improved Entomological Forceps. Brooklyn, N. Y. 



