138 CALIFORNIA ACADEMY OF SCIENCES. 



palettes; the lateral margins of the head deeply con- 

 cave before the middle; temples swollen, the margins 

 convex; head widest across the posterior angles which 

 are not produced backwards, but rounding rectangular; 

 the inconspicuous eyes with conspicuous black flecks 

 are situated in the very apex of these angles; each 

 angle bears two longish hairs and one shorter one; pos- 

 terior margin nearly straight, feebly angulated in the 

 middle; whole head transparent whitish with faint 

 brownish tinge here and there. 



Prothorax large, lateral margins with lateral angles 

 broadly and bluntly rounded; posterior margin almost 

 semicircular, with four rather short hairs on each lat- 

 eral half; pale transparent whitish with faint brownish 

 at margins. Metathorax with rapidly diverging lateral 

 margins, straight posterior margin with two hairs and 

 a spine in region of posterior angles, three hairs near 

 posterior margin just inside of this region, and two 

 hairs and a spine anterior to these submarginal hairs. 



Abdomen broadly elliptical; posterior angles not pro- 

 jecting and without conspicuous hairs; on the lateral 

 portion of each segment a group of three hairs near the 

 posterior margin, and a hair and a spine near the 

 lateral margin and more anterior; pale transparent 

 whitish with a pale brown narrow submarginal longi- 

 tudinal band fading posteriorly. 



