178 



BRITISH BEES. 



Abdomen subclavate. 



First three joints of labial palpi 

 continuous, terminal joint in- 

 serted before apex of third . 

 [First two joints of labial palpi 

 continuous, two last inserted 

 before the apex of the second 

 Abdomen obovate, rounded at apex 

 Abdomen truncated at base. 

 Segments slightly constricted, 

 and not spotted with colour . 

 Segments not constricted, 

 spotted with yellow . . . 

 Pollen conveyed on the posterior legs. 

 Two submarginal cells to the wings. 

 Abdomen lanceolate ; antennae 

 clavate; posterior legs covered 



with long hair 



Abdomen obovate ; antennae fili- 

 form ; posterior legs covered 

 densely with short hair . . . 

 Three submarginal cells to the wings. 

 Short dense hair on the whole pos- 

 terior tibiae externally. 

 Abdomen obovate ; first joint of 

 labial palpi twice as long as 



second 



Abdomen subrotund; first joint 

 of labial palpi six times as 



long as the rest 



Long hair, but loose, on the en- 

 tire posterior tibise, exter- 

 nally and internally. 

 Abdomen subclavate .... 

 Curved hair fringing the edge only 



CHELOSTOMA (21). 



HERIADES (22). 

 OSMIA (24). 



MEGACHILE (19). 

 ANTHIDIUM (20). 



PA^URGUS (9). 

 EUCERA (10). 



ANTHOPHORA (11). 

 SAROPODA (12), 



CERATINA (13). 



