98 CALIFORNIA ACADEMY OF SCIENCES. 



protruding; temples convex, hind-head widest about 

 half way between the eyes and the posterior angles; 

 margin with no long hairs, but with a short curving 

 hair and a few prickles; occipital margin straight; 

 head all brown, except small, nearly uucolored part of 

 clypeal front, and antennai, of which the first three 

 segments are uncolored, last two pale brown; narrow 

 marginal antennal bands; small signature, widest ante- 

 riorly and extending posteriorly in a fading, acum- 

 inate point; indistinct occipital bands and temporal 

 borders blackish; anterior horns of the prothorax show- 

 ing through, producing the effect of black triangular 

 blotches at the base of the occipital bands. 



Prothorax quadrangular, straight in the middle third 

 on the metathorax; one very short hair in the posterior 

 angle; general color transparent whitish, with distinct, 

 even black lateral borders. Metathorax with lateral 

 margins slightly convex before the middle; longer than 

 broad; posterior margin slightly angulated upon the 

 abdomen; three long hairs and two shorter hairs in the 

 posterior angles; general color pale transparent brown- 

 ish, with irregular lateral bands of black, expanding 

 near the anterior angles into conspicuous triangular 

 blotches, narrower below these blotches than the lateral 

 bands of the prothorax. Legs long, slender, trans- 

 parent, with black bands on femora and tibire; tibiae 

 and tarsi brown, a few scattered hairs on the legs. Pro- 

 sternum with curving intercoxal lines; a medial, meta- 

 thoracic, sternal blotch oblong, darker on the posterior 

 half. 



Abdomen slender, elongate, slightly widening to seg- 

 ment 4, then tapering gradually to segment 9; segment 

 2 longer than the other segments, while segments 4 and 

 5 are narrow, especially in the middle; posterior angles 



