NEW ARRANGEMENT OF BRITISH BEES. 
167 
(Nudipedes), by reason of their parasitism, they not re¬ 
quiring organs to collect what they have no occasion 
to use. Their parasitism extends both upwards and 
downwards, those with three submarginal cells being 
parasitical upon all the brush-legged bees, whether sub¬ 
normal Andrenidce or the Scopulipedes, those with two 
submarginal cells being restricted in their parasitism to 
the Dasygasters. 
These Dasygasters, or hairy-bellied bees, form the 
next very natural group. Their general peculiarity of 
structure I have had occasion to advert to, in treating, 
in a former section of the work, upon the structure of 
the imago, and to which I now refer to avoid repetition. 
This group contains the majority of the artisan bees, 
whose habits I shall particularize when I speak of the 
genera specially; but we find carpenters amongst the 
Scopulipedes, and essentially builders amongst the Ceno- 
bites, which form a further and the last of our natural 
groups. A true cuckoo-bee ( Apathus) consorts amongst 
these Cenobites, and properly so, from many causes. 
The anomaly would have been too great to have removed 
it to a place amongst the Nudipedes, for although in 
obsolete paraglossie, and in a deficiency in the normal 
number of the joints of the maxillary palpi, it resembles 
some of these, its general habit and general structure, 
bating that controlled by its parasitical habits, are so 
like Bombus, that it cannot well be separated far from 
the latter,—especially as we know too little of its habits 
to say that it does not regularly dwell in the nest of its 
sitos, which may well mistake it for one of its own com¬ 
munity, it resembling the species it infests so closely; 
it therefore consistently associates systematically with 
the temporarily social societies. 
