APPENDICES. 349 
same part of the hind leg will be found simply rounded, and 
entirely without that broadened, flattened, and hollow character 
which distinguishes the hind leg of the honey-collector. This 
parasite, having neither the instinct to collect food for its 
expected progeny, nor, in fact, the means of carrying it home, 
even if the will existed, has been deemed by naturalists to be 
entirely devoid of those parental and home instincts which 
distinguish the recoltant or harvesting kinds. It is on that 
account that it has, ike the genus to which it belongs, re- 
ceived the name of Apathus; apathy in regard to the provid- 
ing protection or food for their young being the leading charac- 
teristic of parasites. It will be observed that the light band 
on the thorax, near the head, is less distinct in the Apathus, 
and also that the abdomen is not quite so profusely furred. 
Latreille termed these parasitic bees Cuculince, or cuckoo-bees, 
the term <Apathus having been substituted by an English 
naturalist. 
The resemblance of the third insect figured in the group above 
is still more curious. Although, at a glance, it so much re- 
sembles both the bees represented in the engraving as to cheat 
the careless observer, it will on closer examination prove itself 
not only far from being identical, but will be found so radically 
different as at once to show that it belongs to another and 
distinct order of insects, the Diptera, or two-winged order. 
It is, in fact, merely the general size and the colouring which 
deceive the eye untrained to appreciate anatomical form with 
accuracy. On examination, almost every part of the structure 
will be found to be exceedingly distinct from that of the bee : 
the eyes are differently placed and different in form, while 
their size and colour are nearly identical ; the antenne, instead 
of being horny and robust, like those of the bee, are delicately 
slender and feathered, like some kinds of moths—but these 
are not conspicuous appendages, and escape the attention of 
the ordinary spectator. The thorax, or fore part of the body, 
is, however, furred with orange hairs next the head, which 
become yellow near the abdomen, leaving the centre of the 
thorax black ; the segments of the abdomen nearest the thorax 
are clothed with yellow fur ; the central segments are black, 
