ADVERTISEMENT. 



With tlio issue (if tin- first volume of " American Spiders and their Spinningwork," the 

 author (who is necessarily the pu])lislier also) announces the withdrawal of the special terms 

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



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

 $10, as it is delivered. No volume will be sold sei)arately. 



The several volumes will be mailed at the i)ublisher's expense, bound in st(nit doth siiitalile 

 for ordinary library use, l)ut with uncut edges for the acconniiodation of those who wish 

 special library l)iiidiug. 



"The Author's Edition" is strictly limited to two hundred and fifty copies, which will l^e 

 numbered consecutively in tlu' 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 tril)es. The First Volume treats particularly of Snares and Xests. The Second 

 \'olume will treat of the Cocooning Industry, ^Maternal Instinct.s, and (ieneral Habits. These 

 volumes are lil^erally illustrated by drawings from Nature, the First Volume alone containing 

 three hundred and fifty-four figures. The Third Volume will be (k'voted to descrijitions of 

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

 plates, painted l)y hand in the colors of Nature. 



All ])usiness communications and subscriptions may be addressed directly to the author or to 



"AmERKAX Sl'IDEUS AM) THEIR SpINNINGWORK," 



Academy of Natural Sciences, 



Logan Square, Philadeli'iiia. 



The author's published works u]ion the aiits may be had on the (nllowing tei-nis: — 

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



pp. :512, plates XXIV ^W m 



"The Honey Ants of the (iardeii of tlie (iods, and the Occident Ant.-^ of the Ami-r- 



iean Plains." Octavo, bound in cloth, pp. 188, plates XllI 1 •')<-) 



"The Mound Making Ants of the AUeghenies. Paper, pi>. 5(5, plates \'I ~r\ 



These will be mailed to any address for the above i>rices, or tlu- three works for . ."> (Ml 



Address, " Acaukmy <>k Nati hai. Scibkcex," 



Logan Square, Puiladelimha. 



