304 
BRITISH BEES. 
dorsal segment triangular, and its ventral plate straight 
at its apex with the lateral angles reflected, making it 
concave beneath and subcarinated longitudinally in the 
centre, or also triangular and the sides of the prominent 
angle deflected. 
The male differs in having the antennse slightly 
longer, in being rather more pubescent, more highly 
and rather differently coloured, and its terminal segment 
merely rounded. 
NATIVE SPECIES. 
3. campestris, Panzer, <f $ . 6-9 lines. (Plate XV. 
fig. 2. The fig. marked <$ by mistake for $ .) 
campestris, Kirby, $ . 
Rossiella, Kirby, <$. 
Leeana , Kirby. 
Franciscana, Kirby. 
subterranea, Kirby. 
2. Barbutellus, Kirby, $ ? . 6-9 lines. 
3. vestalis, Fourcroy, $ ? . 6-10 lines. (Plate XY. 
fig. 2 ? .) 
vestalis, Kirby, $ . 
4. rupestris, Fabricius, $ $. 6-10 lines. (Plate XY. 
fig- 1 S ? •) 
albinella, Kirby, <$. 
GENERAL OBSERVATIONS. 
Named from a, privative, irdOos, affection; that is 
to say, without affection, from their habit of leaving 
their young to be nurtured by others, in allusion to 
their parasitical instincts, for the young of these bees 
are brought up in the nests of the Bombi. They form 
the only instance in bee-parasitism of the parasite 
