J. H. Emerton — New England Attidce. 23V 



front of the head of the bhiek variety are three tufts of long hairs 

 which are entirely wanting in lighter colored males. Fig. \a. 

 Althougli males of both kinds pair with the same female their 

 behavior Avhen mating is different, for an account of which see 

 Peckham's article in Occasional Papers of the Nat. Hist. Hoc. of 

 Wisconsin, vol. i, 1888. 



The cephalothorax of the female is widest behind the middle and 

 is there two thirds as wide as long. It is narrowed to half that 

 width at the hinder end and slightly narrowed toward the front, the 

 head being not much more than half as wide as the cephalothorax is 

 long. Fig. 1. The top of the cephalothorax is flat, rising a little 

 between the dorsal eyes and the front row of eyes is straight on the 

 upper edge. The comparative length of the legs is 4, 1, 3, 2 and the 

 fourth pair is as long as the body. 



The male palpi are long. The tibial hook is straight and blunt 

 and about as long as the tibia itself. The tarsus is short and wide 

 and turned outward at the tip. The palpal organ is oval with a long 

 tube bent around the end of the bulb with its point in the groove on 

 the outer corner of the tarsus. Fig. \c. 



The epigynum has a small oval opening very far farward and a 

 slight notch on the edge of the transverse fold. Fig. \d. 



This is an active species, living on plants in summer. 



Eastern Massachusetts and New Haven and Meriden, Connecticut. 



Marptusa familiaris Peckham. 



Attvs familiaris Hentz. 



The female is 10"^'" long and the male nearly as large. The fourth 

 pair of legs is longest in the female and the first pair in the male. 

 The cephalothorax and abdomen are both much flattened. The 

 cephalothorax is rounded at the sides and nearly twice as wide in the 

 middle as in front. The abdomen is twice as long as wide, widest 

 in the middle and truncated at the front end and sometimes at the 

 hinder end also. In the latter case the spinnerets are so far under 

 the abdomen that they cannot be seen from above. The legs are 

 long and stout, the fourth pair one and a half times as long as the 

 abdomen. 



The general color is gray, covered with long gray and white hairs. 

 The cephalothorax has a dark brown band along the edge each side 

 which is larger and darker in the _ males. The abdomen has in the 

 middle a yellowish white marking, covering half its Avidth, the front 

 half straight and the hinder half notched at the sides. PI. XIX, fig. 



