128 CALIFORNIA ACADEMY OF SCIENCES. 



nature large, broadly triangular with rounded angles, front 

 margin parallel with margin of clypeus ; antennae with 

 first segment uncolored, the remaining four brown, seg- 

 ment 2 longest, segments i and 3 about equal, segment 

 5 shorter than segment 4, each segment with a few short 

 hairs; angles of antennary fossae not projecting; eyes 

 prominent; temporal margin with a few very short bristles; 

 head broadly margined, widest posteriorly, with dark 

 brown; a dark brown band across the head immediately 

 behind the clypeal signature. 



Length of thorax 2.5 mm., width 1.9 mm.; prothorax 

 forming a parallelogram a little wider than long, the angles 

 weakly rounded ; lateral borders dark brown, extending 

 inward along the front and hind margins toward the 

 middle, but not reaching it, leaving the middle third of 

 the segment uncolored. Metathorax expanding posteri- 

 orly; lateral margins with some small, uneven, rounded 

 projections about the middle; posterior margin slightly 

 concave, angles acute; near each angle near the posterior 

 margin a single pustulated hair, and a little further in 

 seven long pustulated hairs grouped in a small, 'elliptical, 

 uncolored space; the whole metathorax strongly brown 

 except narrowly along the posterior margin and behind 

 and at the sides of a central longitudinal brown quadrangle 

 (the sternal blotch showing through). Legs strong, with 

 elongate coxa 1 , very short thick tarsi, with short thick 

 claws; everywhere dark brown, except at the basal and 

 distal extremities of coxa; and femora and the tarsi; a few 

 scattered hairs. 



Abdomen, length 4.5 mm., width 2. mm.; widest at 

 sixth segment, tapering sharply to posterior extremity; 

 posterior lateral angles of one segment projecting over 

 anterior lateral angles of succeeding segment; segment 

 1 shortest, segment 7 longest; color mostly dark brown, 



