Superfamily Argiopoidea 



Chemmis unicolor (C. u-ni-co'lor). — Only the female of this 

 species is known. It measures a little more than one half inch 

 in length. The cephalothorax is reddish brown; the abdomen, 

 pale brown, darkest near the tip. The anterior median eyes are 

 about the same size as the anterior lateral eyes. The lower 

 margin of the furrow of the chelicerae is armed with three teeth. 



Genus APOSTENUS (A-pos'te-nus) 



In this and in the three following genera the claws of the 

 posterior tarsi are not covered with bundles of spatulate or 

 truncate hairs; but in this genus there are two long, spatulate 

 hairs beneath the claws. The posterior row of eyes is slightly 

 recurved; and the anterior median eyes are smaller than the 

 anterior lateral eyes. 



There are only two described American species. One of 

 these, A. cinctipes, was described by Mr. Banks from a single 

 specimen taken at Olympia, Wash.; the male of the other, 

 A. acutus, was recently described by Mr. Emerton ('09) from 

 specimens taken in Connecticut and on Long Island. In each 

 case the spiders are about one sixth inch in length. 



Genus AG RCECA (A-groe'ca) 



This genus is closely allied to Apostenus but differs in lacking 

 the two spatulate hairs beneath the claws of the hind tarsi and 

 in having both rows of eyes procurved. The eyes of the anterior 

 row are close together; those of the second row are more widely 

 spaced. 



Only two, or perhaps three, American species are known. 

 One of the supposed species, A. ornata, is believed by Emerton 

 to be the same as A. pratensis. 



Agrceca pratensis (A. pra-ten'sis). — This spider is about 

 one fourth inch in length. The cephalothorax is widest and 

 highest behind the middle, the head a little more than half as 

 wide as the thorax; the abdomen is widest across the hinder 

 third and not much pointed behind. The cephalothorax is light 

 brownish yellow; it has a narrow dark edge on each side and a row 

 of radiating dark lines each side forming two broken dark longi- 

 tudinal bands. The abdomen has two rows of gray oblique 

 markings on a light ground. 



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