24.6 THE CANADIAN ENTOMOLOGIST. 



i. Wings and legs ferruginous; hind spur finely serrate, with 12 or 

 more teeth parallehis. 



Wings and legs not ferruginous ; hind spur with about 6-8 teeth . . 2. 

 2. Cheek beneath produced into a strong tooth or dentiform 



angle ligatus. 



Cheek rounded Lerouxii. 



Males. 

 Dull greenish ; legs yellow fasciatus. 



Black , 1. 



1. Femora and wings yellow or ferruginous parallelus. 



B'emora black 2. 



2. Flagellum black ; mandibles usually black Lerouxii. 



Flagellum beneath and middle of mandibles yellow ligatus. 



Agapostemon, Guerin. 

 Females. 



Abdomen black viridulus. 



Abdomen green 1. 



1. Mesonotum with a distinct double punctuation Texanus. 



Mesonotum without a distinct double punctuation 2. 



2. Metathorax strongly longitudinally rugose, without enclos- 



ure radiatus. 



Metathorax coarsely reticulated, a triangular space finely 



rugose spleudens. 



Males. 



Abdomen with six yellow bands 2. 



Abdomen with five yellow bands 1. 



1. Ventral segment 4 thin, entire, 6 with a median carina. . . . viridulus. 

 Ventral segment 4 thickened, emarginate, margin depressed between 



the gibbous sides Texanus. 



2. Hind femora robust, their metatarsi carinate ; basal middle of 



abdomen ferruginous  • splendens. 



Hind femora less robust, their metatarsi simple ; basal middle of 

 abdomen black, with a greenish tinge radiatus. 



Augochlora, Sm 

 Segment 2 rather opaque, closely punctured, densely ciliate .fervida. 

 Segment 2 shining, sparsely punctured, hardly ciliate viridula. 



OXYSTOGLOSSA, Sill. 



Females. 

 Sides of mesonotum not reticulated ; cell III,+ 2 subappen- 

 diculate piira. 



