172 J. H. Emert07i — N'ew England Drassidm, 



Prosthesima l. Koch. 



Ceplialothorax widest in the middle and more than half as wide in 

 front. Eyes near together, occupying about half the width of the 

 head. The middle eyes of both rows smaller than the lateral and 

 nearer together than they are 'to the lateral eyes. Upper row 

 straight, or the lateral eyes a little farther back. Sternum large 

 and nearly as wide as long. Maxillae wide in the middle and but 

 little widened at the ends, PI. iii, fig. 6a. First and second legs with 

 flattened haii'S under the tarsus and part of the metatarsus. 



Prosthesima atra. 



Herpyllns ater Hentz. 



Prosthesima funesta Keyserling, speeiraens in Mus. Comp. Zool., Cambridf^e, Mass. 



Prosthesima melancholica Tliorell, Bull. Hayden's U. S. Geol. Survey, Yol. Ill, 1877. 



FL.A.TE III, FIGURES 6, 6c, Gcl. 



Female, 8""" long ; cephalothorax, 3™"\ Male smaller. Ceplialo- 

 thorax and abdomen both a little flattened above. Cephalothorax 

 narrow in front, about half as wide as in the middle. Plate iii, fig. 6. 

 Abdomen oval, the hinder half usually a little wider than the front. 

 Sternum very large, almost as wide as long, fig. 6a. Maxillae and 

 labium large and a little shorter and wider than in P. ecdesiasHca. 

 Feet 1 and 2 with flattened hairs under the tarsus and half the 

 metatarsus. Feet 3 and 4 with fine hairs in the same places. 



The whole body is black in most individuals, sometimes, especially 

 in the young, yellowish broAvn on the ends of the feet and under the 

 abdomen. 



Epigynum large and distinct with two small depressions in front 

 and large openings behind surrounded by a thick brown rim, fig. 6d. 



The male palpus is short with a very large tursus, as long as the 

 tibia and patella together and more than half as wide. The process 

 on the outside of the tibia is about as long as the tibia itself and 

 nearly straight. The palpal organ has a small fine tube and several 

 small hooks and processes all at the tip end of the palpus, fig. 6c. 



This spider lives under stones and leaves. The cocoon is flat on 

 one side, by which it is attached, and convex on the other. It is 

 white, or sometimes a little pink. 



Mt. Washington, N. H., Eastport, Me., Massachusetts, and in 

 N, Pike's Long Island, N. Y., collection. 



P. melancholica was found by Dr. A. S. Packard at Monitou, 

 Colorado, 1875. 



