ANDRENA. 
201 
and the terminal segment having a triangular central 
plate, its sides rigidly setose. 
The male differs in having the head rather wider than 
the thorax, the vertex where the ocelli are placed more 
protuberant, the mandibles very large and more acutely 
bidentate, sometimes largely forcipate and with but one 
acute tooth ; the males in most species greatly differ 
from their females. 
None of these insects exhibit any positive colouring of 
the integument, excepting in some upon the abdomen, 
which exhibits red bands, and is disposed to vary con¬ 
siderably in intensity and breadth, and in some the 
clypeus and face are of a cream-colour, but which occurs 
chiefly among the males. They are very dissimilar in 
general appearance, some being densely pubescent all 
over, others merelv so on the head and thorax; others 
are banded with white decumbent down, and some are 
wholly unmarked upon the abdomen. These pecu¬ 
liarities help to group them, and thus facilitate their 
recognition. 
NATIVE SPECIES. 
§ Banded ivith red on the abdomen , the segments of which are more or 
less fringed. 
1. Hattorfiana, Fab., f $ . 6-7 lines. 
Lathamana, Kirby, $ . 
haemorrhoid alis, Kirby, $ . 
2. zonalis, Kirby, <f $ . 4J-5 lines. 
3. florea, Fabricius, £ ? . 5-6^ lines. 
Rosae, Kirby, var. 
4. Rosae, Panzer, f ? . 4-6 lines. (Plate III. fig. 
lc??0 
Rosae , Kirby, $ . 
