SPIDERS OF THE FAMILY ATTIDAE FROM AMES 229 



WALA Keyserling 1884. 



Tlie eephalothorax is flat with the sides rounded. The ocular 

 quadraiii^le occupies aliout two-fifths of the eephalothorax. The 

 abdomen is nearly twice as long as the eephalothorax. Tlie first 

 pair of legs is longer than the others. 



WaJa palmuriim. Hentz 1846. 



A single female identified by Banks: in 1891 is in th.e ooUeetion. 

 The eephalothorax is l)rown with a narrow white stripe extend- 

 ing its length on each side. The eyes are on dark spots. The 

 clypeus is thinly eovered with white liairs. Dorsally the ab- 

 domen has two white stripes on each side and a central notched 

 dark stripe extending lengthwise. The sternu n and mouth parts 

 are brown and the ventral surface of the abdoiuen is white. The 

 first pair of legs is dark l)rown and the others are white. 



This spider ranges througliout the eastern i:nd southern half 

 of the United States and is found during tlie summer on trees 

 and bushes. 



MARPISSA Koch 1846. 



This g"enus is one of the most common which has been observed 

 around Ames. These spiders have been tictive until early 

 November. During the early part of ]March several were ob- 

 served moving aliout and many adult males ynd females which 

 wintered under the bark of trees were collected. Tlie' distin- 

 guishing characteristics of this genus are that the tibia:' of the 

 first pair of legs are armed with three pairs of spines beneath, 

 and a laree gray, angular central band on the abdomen. It is a 

 very small genus represented by but three speues in our fauna. 

 Large numbers of one of these have been collected at Ames by 

 the writer. 



Marpissii uHdata DeGeer 1778. 



This .><pecies is very easily recognized by the uniform gray 

 eephalothorax and the angular gi^ay central stripe on the ab- 

 domen l>ordered with lilack. Its length is from ten to thirteen 

 millimetres. It ranges from the east coast as far west as Utah. 

 SALTICUS Latreille 1804. 



The eephalothorax is about one and a half times as long as 

 wide and slightly wider in the middle than at either end. The 

 anterior eyes are very unei[ual in size. Thv^ middle eyes are 

 located about halfway between the anterioi- lateral and the 

 posterior eyes. 



