AgalenidcB and Dysderidce. 177 



tarsus as long as both of tliem. The tibia has a short pointed pro- 

 cess extending forward over the tarsus, fig. 4c. The tarsus is curved 

 outward at the end. The tube of the palpal organ is slender and 

 extends along the outer edge of the tarsus for its whole length. At 

 the outer end of the palpal organ is a short process flat at the end 

 and curved downward, fig. 4c?. The epigynum has a long opening 

 on each side and a short transverse pit in front of them in the 

 middle, fig. 4e. In western specimens the opening at the hinder 

 part of the epigynum has the sides more nearly parallel, not diverg- 

 ing forward as much as in those from New England. 



It lives under stones and leaves. The cocoon is white and flat, 

 with its diameter as great or greater than the length of the spider. 

 The female stays near the cocoon, but makes no nest. 



All over New England, from the White Mountains, N. H., to New 

 Haven, Connecticut ; Adirondacks, N. Y. 



Thorell's specimens were collected by A. S. Packard in 1875. A 

 female with cocoon of eggs on Gray's Peak, Colorado, over 11,000 

 feet high, on fir, Kelso's cabin, Colorado, and a small one from 

 Idaho, all adult females and all smaller than most eastern specimens. 



Pythonissa Koch. 



Pythonissa imbecilla Keyserling, speeimen fioni Kentucky iu Mus. Coinp 



Zool., Cambridge, Mass. 



Plate IV. figures Ga, G?;, 6c, <6d. 



The male is about 4'""' long and the female 5""". The two rows 

 of eyes are nearly of the same length, the hindei" row almost straight, 

 with the lateral eyes only slightly farther back than the middle 

 ones. The lateral eyes of both rows are larger than the middle eyes. 

 The maxilhe are almost as wide as long and are curved inward so as 

 to touch in front of the lip. PI. iv, fig. 6«. The front edge of the 

 maxilhe is straight with the corners only slightly rounded. The 

 mandibles are small and the wide tooth under the claw, fig. 6^, can 

 be plainly seen just in front of the maxillae with another pointed 

 tooth on its inner side. The cephalothorax, both above and below, 

 and the legs are orange-brown with black hairs. The abdomen is 

 bluish black with a few v/hitish hairs at the hind end and around 

 the four muscular spots near the middle. The epigynum, as in fig. <od. 

 The patella and tibia of the male palpus are very short and not so 

 thick as the femur. The tarsus is as long as the patella and tibia 

 together. The palpal organ is large and complicated, the tube show- 

 ing plainly across the outer end, fig. 6c. 



