229 LONGICORNIA. [ Hylotrupes. 
HYLOTRUPES, Serville. 
This genus contains two species, one of which is widely distributed 
and occurs both in Europe and North America, and the other has been 
described from Australia. H. Kozicrowiczi, which has been considered a 
separate species, appears to be now regarded as a variety of the male of 
HI. bajulus ; the larva of the latter insect is found in dead pine and fir, 
and much resembles that of Callidium variabile, except that the ocelli 
are smaller and are three, instead of two, in number ; it sometimes does 
considerable damage to posts and rails. 
H. bajulus, L. Oblong, with the elytra much depressed, black, 
rather shiny, elytra often pitchy black or testaceons; head much 
narrower than thorax, rugosely punctured, antenne short, obscurely 
ferruginous ; thorax transverse, villose, with sides strongly rounded, 
closely punctured, with a smooth central line or space, on each side of 
which is a large and shining smooth tubercle ; elytra rugose, especially 
on posterior half, with an interrupted band of thick white pubescence 
before middle often forming four distinct patches ; under-side villose ; 
legs moderate, black, more or less pitchy. L. 14-20 mm. 
In the male the thorax is less transverse than in the female, and has 
the central portion more strongly punctured ; the fifth abdominal seg- 
ment, moreover, is truncate or slightly emarginate in the male and pro- 
duced in the female. 
In old posts, rails, &e. ; rare; Forest Hill (Marsh) ; Weybridge (Power); Belve- 
dere (T. Wood) ; Hammersmith, in orchard trees (S. Stevens); Epping; Hertford ; 
Suffolk ; Deal; I have specimens in my collection taken by Lady Maryon Wilson 
about the year 1795; this lady appears to have been one of the first of our British 
collectors. 
CALLIDIUM, Fabricius. 
This is a large and important genus, containing about ninety species, 
which are widely distributed ; they appear, however, to be chiefly 
confined to the Northern Hemisphere, although species have been 
described from Brazil and the Australian region ; fourteen are found in 
Europe, of which four occur in Britain ; they are very different in size 
and general appearance. 
The larva of C, variabile is described by Schiédte (Pars ix. p. 416); it is clothed 
all over with rather thick and short pubescence ; the head is twice as broad as long, 
with two ocellion each side, which are rather large, and comparatively long antenne ; 
the prothorax is about half as broad again as the eighth abdominal segment; the 
abdomen is furnished with scansorial tubercles; the legs are very short; this larva 
inhabits dead oak; that of C. violaceum sometimes does considerable damage to fir 
timber; before changing into a pupa it bores into the solid wood to a depth of several 
inches. 
The British species may be distinguished as follows ; one of them, 
C. sanguineum, is doubtfully indigenous. : 
