92 CALIFORNIA ACADEMY OF SCIENCES. 



Head, length .47 mm., width .44 mm.; broadly conical, 

 front broad, slicrhtlv convex with a shallow median emar- 

 gination; a hair arising from the dorsal surface near the 

 obtuse anterior angle projects forward beyond the margin; 

 behind this two short hairs (not marginal and showing 

 through as in n. sp. a) and behind these a rather long 

 hair ; two short marginal hairs ; trabecular long and 

 rather slender, acutely-tipped; antennas long; temporal 

 angles with three hairs, also one hair just behind the eye, 

 and one in anterior angle of eye; occipital border slightly 

 convex; forehead much paler colored than hind head; 

 signature short with slightly concave anterior margin and 

 obtusely angled hinder margin ; antennal and internal 

 bands pale, temples and widely separated occipital bands 

 darker. 



Prothorax subquadrangular ; rounded posterior angles 

 with one hair; posterior border straight; distinct, regular, 

 colored lateral borders. Metathorax pentagonal; with two 

 non-pustulated hairs in lateral angle and five pustulated 

 hairs ranged along each latero-posterior margin ; uniform 

 lateral colored border. Legs pale colored except tarsi 

 and claws. 



Abdomen, elongate ovate, without angulated lateral pro- 

 jections, with a few pustulated hairs on surface, and one 

 or two rather longish hairs in posterior angles; segments 

 i_7 with lateral trangular blotch bearing three or four 

 pustulated longish hairs ranged along posterior border of 

 blotch; an uncolored stigmatal spot in each blotch; the 

 lateral margins of segments 1 and 2 (less distinctly in 2) 

 bordered with dark brown like the thoracic segments; 

 segment 8 with transverse blotch extending entirely across 

 the segment; and segment 9 uncolored or faintly colored, 

 with slight emargination and only a few very short hairs. 



