524 CALIFORNIA ACADEMY OF SCIENCES. 



lying in the angle of the emargination, the smaller and 

 posterior part lying apparently on the dorsal surface of 

 the temple: ocular fringe distinct, composed of longish 

 hairs: temporal margins with slightly rounded anterior 

 and posterior angles, and slightly convex lateral margin 

 which bears five longish hairs; occipital margin weakly 

 sinuous and concave, with four hairs; fuliginous with 

 black uneven occipital border; small black ocular blotches, 

 and four small circular uncolored spots on forehead, from 

 each of which arise one or more hairs. 



Prothorax with bluntly rounded lateral angles, slightly 

 concave latero-posterior margins, and convex posterior 

 margin, the segment produced backward so as to very 

 materially narrow the median part of the mesothorax, 

 with a spine and a long hair in the lateral angles and two 

 separated hairs on the concave lateral margins, the ante- 

 rior hair being short and weak. Mesothorax separated 

 from metathorax by an uncolored suture, but with ex- 

 tremely slight lateral emargination; no hairs. Metatho- 

 rax larger than mesothorax, with straight posterior mar- 

 gin, a spine, a weak hair and a strong hair in posterior 

 angles, and posterior margin not with a marginal series 

 of hairs; all the thoracic segments very dark, the ground 

 color same as that of head and darker than that of abdo- 

 men ; the lateral borders darkest. Le£>;s concolorous with 

 body, robust. 



Abdomen long-ovate, segments of equal lengths, a few 

 long hairs in posterior angles, and dorsal surface with 

 posterior margins of segments with single series of hairs 

 set in faint pustulations; ventral surface with series of 

 short fine hairs in small but distinct pustulations; last 

 segment narrowly, flatly convex, with a fringe of fine un- 

 colored hairs; whole abdomen smoky but lighter than 

 head and thorax; black lateral bands paling inwardly. 



