THE THERIDID/E 



131 



long curved horn projecting forward near the base of each 

 mandible (fig. 311). The legs are very slender and trans- 

 parent, slightly colored brown, with 

 darker rings at the ends of the femur 

 and tibia. There is a dark mark 

 around the eyes and head, forming 

 behind them a middle line that widens 

 toward the hinder end of the cephalo- 

 thorax. The abdomen is gray, marked 

 on the upper side with three or four 

 pairs of darker spots and behind with 

 lighter spots, somewhat like Theridium 

 tepidariorum. 

 Scy t ode s 

 thoracica. — 

 This is a very 

 peculiar 

 spider, prob- 

 ably imported 

 from Europe, and found 

 It is about quarter of an qJi 

 inch long when full grown. The cephalothorax 

 and abdomen are both round and nearly of the 

 same size. The cephalothorax is low and nar- 

 row in front and slopes upward to the highest 

 point opposite the third legs (fig. 313), and from 

 there falls abruptly behind. The eyes are six in 

 number, in three pairs, the middle pair lowest 

 and the lateral pairs wide apart at the sides of 

 the head (fig. 312). The front of the FlGS . 3I2j 3I3 

 head below the eyes projects forward 

 beyond the mandibles. The legs are 

 slender and tapering, the tarsus and metatarsus not more than 



311 310 



Figs. 309, 310, 311. Pholcus cor- 

 nutus. — 309, side of female 

 enlarged four times. 310, back 

 of female. 311, front of man- 

 dibles of male, showing the 

 curved horns. 



in cellars and closets. 



Scytodes thora- 

 cica. — 312, female enlarged eight 

 times. 313, side of cephalothorax. 



