52 Families and Genera of 



Face tuberculate or arched, not carinate 47 



47. Thorax and scutellum very densely poUinose abovf. 



Ptekallastes 

 Scutellum not densely pollinose above 48 



48. Third joint of antennaj broad, thorax not vittate. . . 4!» 

 Third joint oval; thorax usually vittate above. Helopiiilus 



49. Thickly pilose. Mallota 



Thinly pilose 50 



50. Hind tibia; of male with an internal median spur. 



Teichocnemis 

 Hind tibiffi of male not with an internal median spur. Polvdonta 



51. Hind femora thickened, with a bifid spur below on outer end. 



Stenog.\stek 

 Hind femora not with a bifid spur below 52 



52. Slender species, abdomen narrowed on basal portion. Baccha 

 Abdomen in no wise club-shaped or narrowed basally. . 53 



53. Thorax with distinct yellow markings other than on the hu- 



meri. 02 



Thorax not with distinct yellow markings other than rarely on 

 the humeri 54 



54. Face transversely arched or carinate, not produced, not tuber- 



culate ; abdomen more or less elongate and nearly bare. 55 

 More or less thickly pilose species, often large. . . 57 



55. Hind femora extraordinarily thickened; anterior cross- vein rec- 



tangular Syritta 



Hind femora more or less tliickened ; cross-vein oblique. 56 



56. Face sharply carinate Tkopidia 



Face transversely arched Xvlota 



57. Scutellum, margin of the thorax, and the pleune with bristly 



hairs Chrysochlamys 



Thorax wholly without bristles. ...... 58 



58. Face short, not produced, concave from antenna^ to tip, not tu- 



berculate ; hind femora thickened. .... 59 



Face produced, long 60 



50. Abdomen elongate Brachvi'alits 



Abdomen very broad, thorax densely pilose, very large species. 



POCOTA 



