248 CALIFORNIA ACADEMY OF SCIENCES. [PROC. 3D Ser. 



It has much resemblance to a small T. grallator, but has 

 shorter mandibles, and there is a tooth between the large 

 one above and the inner margin (which is not seen in T. 

 grallator) . 



Three males; Tepic, Nov., and a few young ones. 



138. Tetragnatha atriceps, sp. nov. 



Plate XV, Fig. 13. 



Length $ 7 mm.; femur I 6.5 mm. long. Mandibles three-fourths as long 

 as the cephalothorax, dark red brown, almost black, stout, outer margin 

 rather sinuous, large tooth above, another almost as large nearer to inner 

 margin, the long one on inner margin more erect than in other species; fang 

 short, evenly curved; tibia of palpus much longer than patella, which is very 

 short, whole palpus short; P. M. E. rather far apart. Cephalothorax yellow- 

 ish; sternum pale; abdomen gray-brown, dotted with silvery, slender, cylin- 

 drical; head infuscated. 



One male; El Taste. Easily known by its dark man- 

 dibles and the two large teeth above. 



139. Eugnatha pallida Banks. — Male and female from 

 Tepic, Oct. 



140. Eugnatha orizaba, sp. nov. 



Plate XV, Fig. 16. 



Length & 5 mm.; femur I 4.2 mm. Mandibles two-thirds the length of the 

 cephalothorax, pale, large tooth above is stout and blunt at tip; tibia of palpus 

 barely longer than patella, palpus very short. Length of 2 7.5 mm.; femur I 

 4.2 mm. long; abdomen 1.6 mm. wide. Cephalothorax yellowish; abdomen 

 rather silvery above (discolored). Mandibles one-half as long as the cephalo- 

 thorax, no tooth on outer side of fang, which is nearly evenly curved. Eyes 

 of the posterior row at equal distances; S. E. equal in size, and full as far 

 apart as the M. E. ; abdomen cylindrical. 



One pair from Mt. Orizaba. 



141. Glenognatha minuta, sp. nov. 



Plate XV, Fig. 15. 



Length 6 3 mm.; femur I i.S mm. long. Cephalothorax reddish, with a 

 black stripe in the middle, and spots each side; eyes on black spots; man- 



