106 CALIFORNIA ACADEMY OF SCIENCES. 



body with a few hairs on margins, general surface glab- 

 rous. 



Description of male. Head, length .75 mm., width .62 

 mm.; conical, front produced and narrowly rounded, al- 

 most angulated; sides of forehead with five hairs, and one 

 short one between the first two which rises on upper sur- 

 face of clypeus at some distance from the margin ; be- 

 tween second and third marginal hairs a short hair rising 

 from surface of head so far inward that its tip does not pro- 

 ject over the margin ; temporal margins rounding, with few 

 short hairs ; occipital margin slightly and broadly concave ; 

 trabecular wanting; eyes distinct; antennae with first and 

 second joints longest, each as long as third and fourth, 

 fifth longer than fourth, uncolored ; clypeus uncolored; 

 margins of forehead with a short, interrupted, dark brown 

 line; an irregularly shaped dark brown orbital blotch; a 

 small occipital signature; mandibles chestnut brown. 



Prothorax rectangular, angles obtuse, glabrous, uncol- 

 ored, with broad transparent margin. Metathorax trape- 

 zoidal, widest at posterior angles; lateral margins slightly 

 concave, deepest before the middle; posterior margin 

 weakly concave; a slender hair at each posterior angle, 

 and in the angular area four long, strong hairs set closely 

 together in a circular, uncolored spot; by each lateral 

 margin just before the middle a conspicuous black trian- 

 gle with apex directed inwards, situated in a marginal 

 transparent space; no sternal markings. Legs uncolored 

 except distal extremity of tibia and tarsus, which are dark 

 brown; with a few scattered hairs. 



Abdomen, third, fourth and fifth segments broadest 

 and of about equal width, eighth much narrower than 

 seventh, ninth very narrow and small; posterior angle of 

 second segment with two hairs; posterior angles of seg- 

 ments 3-6 with three hairs, of seventh with at least four 



