154 CALIFORNIA ACADEMY OF SCIENCES. 



the margin between them a hair arising from the dorsal 

 surface, a long hair, a very short weak hair, and beyond 

 the apex of the angle two flattened spines, the second one 

 longer, and a long hair; the front half of the convex 

 margin of the antennal fossa bears one very long hair 

 and four shorter hairs, and the hinder half three weak, 

 equal hairs arising close together and projecting back- 

 wards ; the temporal margins bear two long hairs and more 

 than a dozen short, equal ones ; occipital margin concave ; 

 eyes double, inconspicuous; antennae concealed in fossa? 

 but showing through, fourth segment subgdobular ; labial 

 palpi, with thick segments of about equal length, third 

 and fourth segments with a short hair at anterior 

 outward angle; mandibles pale brown with teeth dark 

 brown; ocular flecks black; antennal fossae rimmed with 

 brown and a curved band, convex behind, across the head 

 between middle points of antennary fossae ; a narrow, long, 

 pale brown triangle projecting back from middle of trans- 

 verse curving band just described; no occipital bands; 

 in front of mandibles a rounding, pointed, crescent-shaped 

 fossa, convex anteriorly. 



Prothorax, subquadrangular, with a narrow anterior 

 neck-like portion which fits into the occipital concavity of 

 the head, sharply set off by a constriction; the posterior 

 margin deeply and broadly emarginate, leaving the pos- 

 terior angles as obtusely pointed, backward projecting 

 processes underlying the metathorax; behind the frontal 

 constriction the margin is angulated and a long hair and 

 a short one rise from the angle ; two black flecks on the 

 frontal margin, a black fleck on each side of the constric- 

 tion, and a brown lateral marking extending a little way 

 along the middle of the margin. Metathorax and meso- 

 thorax continuous in outline with the abdomen; meso- 

 thorax indicated by a very slight narrowing near the front 



