SPIDERS OF THE FAMILY ATTIDAE FROM AMES 223 



several envelopes and usually furnished with ^wo openings.'- "i * 

 "The egg-sacs are frail. As they are made within the sae- 

 like nest, there is not the necessity for a dense cocoon that there 

 is with most other spiders. The cocoon is usually lens-sha,ped 

 and suspended, like a hammock, from the v: alls of the nest. 

 There may be several .cocoons within a single nest ; but usually 

 there is only one. With the species that we liave observed, the 

 eggs are laid early in the season, and the young soon hatch. They 

 are guarded by the parent female until they disperse. On the 

 approach of winter the young make the sac-l'ike nests in which 

 to paas the winter. ' ' 



ATTIDAE IN THE AMES COLLECTION. 

 P'HIDIPPUS 

 P. (indajn Hentz. P. cnstrensis Koch. P. eJectus Roch. P. insolens 

 Hentz. P. poclog7-osus Hentz. P. rufus Hentz. . 



DENDRYPHANTES 

 D. militaris Hentz. D. octavus Hentz. 



HABROCESTUM 



H. pulcx Hentz. 



T. sylvanus Hentz. 



I. elegans Keyserling. 



W. palmarum Hentz. 



M. undata DeGeer. 



S. sccnicus Clerck. 



ZYGOBALLUS 

 Z. ncrvosus Peckham. Z. sexpunctatus Hentz. 



THIODINA 



ICIUS 



WALA 



MARPISSA 



SALTICUS. 



K. nelli Peckham. 



NEON. 

 SYNEMOSYNA 



/S'. formica Hentz. 



DESCRIPTIONS OF GENERA AND SPECIES. 

 PHIDIPPUS Koch 1846. 

 The representatives of this genus are large and usually very 

 hairy. The cephalothorax is high and widened across the. mid- 

 dle. The first legs are very stout, and are thickly covered, with 

 hairs. The oeular quadrangle is a little wider than lou,gj and is 

 confined to the anterior two-fifths of the cephalothorax.. The 

 anterior row. of eyes is curved and the eyes are but Uttlp. 

 separated. The small median eyes are clo.v^r to the anterior: 



