184 J. II. Emerton, 



as narrow at the base as in P. pumilus. The tarsus is oval and 

 less pointed than in riparius, with the notch smaller and not as 

 near the tip. At the base of the palpal organ is a long hook turn- 

 ing out at right angle to the tarsus, PI. I, rig. 13. The female is 

 of the same size as the male. The epigynum is elongated, a third 

 as long as the abdomen. At the front end close behind the fourth 

 coxa; is a small, dark colored, sharp point directed forward a little 

 behind which the round spermathecae show through the skin, and 

 behind these two parallel dark lines extend backward and meet at 

 the base of a short, pale, blunt appendage directed backward. 



This species is found under leaves in company with riparius and 

 pumilus. Clarendon Hills and Waltham, Mass. 



Argyrodes cancellatus. (Plate I, figures 10 to 10c.) 



Theridion cancellatum, Hentz. 



LasiBola cancollata, Emerton, N. E. Therididae. Trans. Conn. Acad, 



1882. 

 Argyrodes larvatus, Keyserling. Spinnen Amerikas. 



This species, found in Connecticut, is abundant on Long Island 

 and farther south. It is sometimes found in webs of its own and 

 often in webs of larger spiders, especially in those of Epeira strix. 

 The colors are light gray and brown, with silvery spots on the 

 abdomen, and when it is motionless with the feet drawn up, it is 

 hard to distinguish from a piece of leaf or bark dropped by accident 

 into the web. 



The female is 2.5 mm. long, with the cephalothorax 1 mm. long. 

 The head is higher, and more vertical in front than in trigonum 

 and the front middle eyes project slightly on the front of the head. 

 The lower part of the head is rounded and extends forward a little 

 beyond the mandibles. The abdomen is as high as wide, rounded 

 above and narrowed toward the spinnerets, which are in the middle 

 of the under side. At the end of the abdomen is a double tubercle 

 with the lower half largest, and on each side of the abdomen a 

 little farther forward another tubercle. The epigynum has a wide 

 oval opening, partly covered and divided by a projection of the 

 front edge. 



The male is 3 mm. long and the cephalothorax 1.5 mm. The 

 lower part of the front of the head extends forward and downward 

 in front of the mandibles in a nose-shaped process, above which 

 there is a round pit on each side of the head. The abdomen is 

 smaller and narrower than that of the female, and covered above 

 with silvery spots mixed with gray and black. The male palpi are 



