Vol. XXX I ] ENTOMOLOGICAL XK\YS Si 



2 Anterior ocellar cicatrix placed in a oit; seventh tergite of male without 

 lateral spines; middle femora without curved tooth below near distal 

 end; eighth sternite ending in three spines, and in many species bearing 

 a fourth discal spine Sticheila. 



3 Posterior surface of thorax concave, its lateral angles prolonged, com- 

 pressed and wedge-like Bicyrtes. 



3 Posterior surface of thorax flat or convex, its lateral angles rounded . .4. 



4 Mandibles toothed; apical end of radial cell of anterior wing on costal 

 border Be m bix . 



4 Mandibles not toothed; apical end of radial cell of anterior wing not 

 on costal border Microbembex. 



KEY TO SPECIES OF STICTIELLA. 



Males 



I Middle femora smooth beneath: wings clear pictifrons. 



I Middle femora not smooth beneath, toothed; wings cloudy. . . .serrata. 



Females 



I Pulvilli distinct; band on scutellum sometimes interrupted narrowly 



on the median line pictifrons. 



I Pulvilli indistinct; no band on scutellum serrata. 



Stictiella pictifrons Smith. 



The markings are lighter on the male than on the female and are not so 

 well developed. Length 12-15 mm. 



Parker records this species from North Carolina in his paper, 

 no specific locality being given. We have no specimens in 

 our collection. 



S. serrata Handlirsch. 



As the specific name signifies, this species has prominent saw-like teeth 

 beneath the middle femora of the male. Both sexes are generally smaller 

 than are those of S. pictifrons. Length 11-13 mm. 



No specific locality record is given for this species; it is re- 

 corded from North Carolina by Parker. We have no speci- 

 mens in our collection. 



KEY TO SPECIES OF BEMBIX 

 Males 



I Intermediate femora distinctly saw-toothed or toothed 2. 



I Intermediate femora smooth, not distinctly saw-toothed or toothed. .3. 



2 Process on under side of the sixth abdominal segment a transverse 

 ridge, not sharply pointed but slight ly curved on cither side of the mid- 

 line belrii" 



