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ADVERTISEMENT. 
With the issue of the first yolume of “ American Spiders and their Spinningwork,” the 
author (who is necessarily the publisher also) announces the withdrawal of the special terms 
offered to subscribers in the prospectus of August Ist, 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 yolumes 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 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 deyoted 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 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 alone containing 
three hundred and fifty-four figures. The Third Volume will be devoted to descriptions of 
the Orbweaying 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 SPINNINGWORK,” 
Acapremy or Naruran Scrences, 
LoGan Square, PHmapELpHta. 
The author’s published works upon the ants may be had on the following terms :— 
“The Natural History of the Agricultural Ant of Texas.” Octavo, bound in cloth, 
ile nsec Neminian Rieu idehc' war nip Madign savas e1 sqa) Psion se ans mee OO 
“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 XITJ............... 41650 
“The Mound Making Ants of the Alleghenies. Paper, pp. 06, OlSteS Vinee ao | LO 
These will be mailed to any address for the above prices, or the three works for. 5 00 
Address, “ AcApremy or Naruran Scrences,” 
? S| 
LoGan Square, PHmApELPHIA. 
