36 ENTOMOLOGICAL SOCIETY 



Mandibles small and weak, vertical, not much arched in front, 

 obliquely truncate at the inner side of apex ; claw weak. 



Maxillce not quite twice as long as broad, inclined over labium, at the 

 outer side a little emarginate, at apex obliquely truncate. 



Labium triangular, a little longer than broad, rounded at the tip, and 

 about two-thirds as long as the maxillae. 



Sternum flat, triangular, longer than broad. 



Legs i. 2. 4. 3. very long and slender, without spines, but sparsely pro 

 vided with fine hairs ; three tarsal claws. 



Abdomen globose, four stigmata at the ventral side ; spinnerets short 

 and equal. 



Usofila gracilis, Keyserling, nov. species. Plate I, fig. 6. 



tf Cephalothorax loug,o, 5 mm. ; abdomen long, 0.6 mm. ; total length, 

 i.i mm. 



Leg i Femur 1.2 Patella and Tibia 1.4 Metatarsus and Tarsus 1.4 Total 4 mm. 



i " 1.2 " i " 3.2 mm. 



0.8 " 0.9 " 0.8 " 2.5 mm. 



i.i " i.o " 1.2 " 3.3 mm. 



Cephalothorax, palpi and legs yellow ; abdomen dirty white, with a 

 few long darker hairs at the dorsum. 



Cephalothorax hardly longer than broad ; in front about half as wide 

 as in the middle ; posteriorly broadly rounded. Seen from the side the 

 dorsum is highly arched, and the highest point is a little behind the 

 eyes ; the median fissure absent ; clypeus as high as the length of the 

 mandibles. 



Eyes in pairs, forming two rows, the anterior row a little recurved ; 

 the two median eyes contiguous and not much more than their diameter 

 separated from the also contiguous i,. E. 



Mandibles diverging, rather porrected and weak ; obliquely truncate 

 on' the inner side near apex. Claw in the male long and thin. 



Maxilla about two-thirds longer than broad, curvatedly inclined, 

 partly embracing the triangular labium.. 



Sternum triangular ; narrower in the male than in the female. 



Legs very long and slender, sparsely provided with short pubescence. 

 Three tarsal claws. The patellar joint of the male palpi shorter than 

 the tibial joint, and both together longer than the very slender and 

 slightly bent femur. The tarsal joint emarginate at the underside, near 

 the base, shorter than the pyriform prominent bulbus, which terminates 

 in a curved projection. 



Abdomen hardly longer than broad, globose, projecting a little over 

 the spinnerets, of which the inferior pair seems to be a little thicker than 

 the superior. 



