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 ; antennas 
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 tibiae, exter¬ 
nally and internally. 
Abdomen subclavate .... 
Curved hair fringing the edge only 
Chelostoma (21) 
Heriades (22). 
Osmia (24). 
Megachile (19). 
Anthidium (20). 
Panurgus (9). 
Eucera (10). 
Antiiophora (11) 
Saropoda (12), 
h 
Ceratena. (13). 
