ADVERTISEMENT. 



With the issue of the rirst volume of " American Spielers and their Spinningwork." the 

 author i who is necessarily the publisher also) announces the withdrawal of the special terms 

 offered to subscribers in the prospectus of August 1st, 1889. 



The price will be $30 for the set of three volumes. Payment is expected for each volume, 

 $10, as it is delivered. No volume will be sold separately. 



The several volumes will lie 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 library binding. 



"The Author's Edition" is strictly limited to two 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 Orb- 

 weaving spiders, both separately and in their relations to the spinning economy of other 

 aranead triljes. The First Volume treats particularly of Snares and Xests. 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 alone containing 

 three hundred and fifty-four figures. The Third Volume will be devoted to descriptions f 

 the Orbweaving fauna of the United States, accompanied by a large number of lithographic 

 plates, painted by hand in the colors of Nature. 



All business communications and subscriptions may be addressed directly to the author or to 



"AMERICAN SPIDERS AND THEIR SPIXNIXGWORK." 



ACADEMY OF NATURAL SCIENCES. 



LOGAN SQUARE, PHILADELPHIA. 



The author's published works upon the ants may l>e had on the following terms : 

 "The Natural History of the Agricultural Ant of Texas." Octavo, bound in cloth, 



pp. 312, plates XXIV $3 00 



" The Honey Ants of the Garden of the Gods, and the Occident Ants of the Amer- 

 ican Plains." Octavo, bound in cloth, pp. 188, plates XIII 1 50 



" The Mound Making Ants of the Alleghenies. Paper, pp. 56, plates VI 7o 



These will be mailed to any address for the above prices, or the three works for . 5 00 



Address, "ACADEMY OF NATURAL S ( IK 



LOGAN SQUARE, PHILADELPHIA. 



