THE LAMELLICORNIA, OR “ CHAFERS.” 
147 
however, possess these latter, as well as, and distinct 
from, the thoracic mass. 
They exhibit, also, a difference in their respiratory 
organs from the other Goleoptera, in the possession of 
a multitude of vascular tracheae annexed to the main 
canals of the ordinary tracheal tubes. It is (as M. 
Lacordaire remarks) doubtless owing to these reserves 
of air that these insects, in spite of their heavy build, 
take so easily to the wing. 
Their larvae, — which are found in dung, at the roots 
of plants, in decaying vegetable matter, or rotten 
mould in old trees, — are fleshy, cylindrical, recurved 
behind in an arch, with the last segment much 
enlarged ; so that, except when very young, they can- 
not extend themselves into a straight line, but lie on 
their sides. They are usually yellowish or bluish- 
white, with a transparent skin, through which the 
dark intestinal canal cau often be seen, especially at 
the apex ; and the segments exhibit very evident 
transverse folds, and have the anal orifice also trans- 
verse, except in tho Lucctnidse, wherein these folds 
are almost entirely absent, and the orifice is longi- 
tudinal. 
Their head is brownish or yellow, horny, rounded, 
with the forehead directed forwards, and the mouth 
on the lower surface ; the mandibles are robust and 
arched ; the antennae five - jointed ; and the eyes 
entirely wanting, except in tho instance of Trichius 
fasciatus, which (according to the observations of 
M. Perris, a distinguished French entomologist) pos- 
sesses a smooth, spherical, reddish eye a little behind 
each autenna. The legs are rather long, and com- 
posed normally of five joints, of which the coxa is 
l 2 
