Il8 CALIFORNIA ACADEMY OF SCIENCES. 



abdominal markings, by the different character of the 

 last segment of the male, and by other less obvious char- 

 acters. Its dark color and large size make it a conspicu- 

 ous object on the birds. 



Description of female. Length 3.37 mm., width .7 

 mm.; body everywhere brown, the accentuated markings 

 black, sides of head, thorax and abdomen subparallel. 



Head, length 7. mm., width .5 mm.; sides nearly par- 

 allel ; clypeus narrowly rounded in front with six lateral 

 short hairs of which four are located along the margin at 

 nearly equal distances apart, one arising from the dorsal 

 surface near the anterior marginal hair, and one near the 

 antennae; trabecular wanting; temporal margins weakly 

 convex with one long hair; antenna? with segments 1—2 

 about equal in length, segment 3 but little shorter, seg- 

 ments 4-5 shorter and feebly colored ; whole head chest- 

 nut brown; clypeal signature wide anteriorly, short, and 

 acuminate posteriorly; the pronounced antennal bands 

 projecting inward at their basal extremities; the irregular 

 orbital blotches, the narrow temporal marginal bands, 

 and the distinct occipital bands much expanded at occip- 

 ital margin, black or strongly dark brown. 



Prothorax short, quadrangular, slightly wider poster- 

 iorly; chestnut brown, paler in the middle; lateral bor- 

 ders black. Metathorax widest at posterior angles ; brown ; 

 lateral margins broadly and irregularly bordered with 

 black; four long hairs arising from an uncolored spot. 

 Sternum almost completely brown, showing a broad long 

 median blotch abruptly pointed behind, set off by narrow 

 uncolored lines from the broad lateral bands. Legs with 

 coxa?, femora and tibia? dark brown; femora paler on 

 inner side and at distal extremity ; trochanters uncolored; 

 tarsi pale brown. 



Abdomen with sides nearly parallel; segment 8 nar- 



