110 SERRICORNIA. [ Corymbites. 
CORYMBITES, Latreille. 
This genus contains about two hundred species, which are chiefly 
confined, as is the case with several of our other genera of the Elateride, 
to Europe, Northern Asia, and North America; several, however, have 
been described from the Cape of Good Hope and Natal, and a few from 
Ceylon, Australia, and New Zealand, so that it is probable that the 
genus will prove to be a very extensive one; the genus is allied to 
Campylus, but differs in having the eyes only moderately prominent, and 
the margin of the front not reflexed; the intermediate coxze are not 
approximate, and the prosternal sutures are occasionally, but very 
rarely, excavate in front; in some species the antenne in the male are 
strongly pectinate or even flabellate, and some are conspicuous by 
reason of their strong metallic colouring, in which they differ from the 
great majority of the Elateride. 
The larva of C. @neus is described and figured by Schiédte (Part v. p. 519, pl. 
vill. fig. 8); it is pale ferruginous with the mandibles and frontal margin pitchy, 
and the scuta marked with very fine longitudinal ferruginous lines; the thoracic 
segment is slightly narrowed in front, but the whole insect is linear and parallel, and 
does not call for any particular comment; the larva of C. castaneus is also figured 
by Schiédte on the same plate (fig. 10); in general shape it resembles that of C. 
eneus, but the abdominal segments have a large dark patch on each side, and the 
ninth segment is more square, with the upper surface more deeply sculptured, and 
more divergent cerci. 
There are forty-five species found in Europe, of which ten occur in 
Britain ; these may be distinguished as follows :— 
I. Antenna serrate from the third joint inclusive, often 
pectinate in the male. 
i. Thorax villose, with posterior angles not carinate ; 
antennw deeply pectinate in the male and serrate in 
thefemalerrs el ft eu tes ees on tious CO CASDANEUS aie 
ii. Thorax more or less distinctly pubescent, but not 
villose, with posterior angles carinate. 
1, Antenne strongly pectinate in male and serrate 
in female; thorax strongly channelled longitu- 
dinally. 
A. Processes of the joints of the antennew in male 
twice as long as the joints ; punctuation of thorax 
less close; colour, as a rule, bronze-green . . C, PECTINICORNIS, L. 
B. Processes of the joints of the antenna in male not 
much longer than the joints ; punctuation of tho- 
rax very close; elytra with basal portion more or 
less broadly yellow, or upper surface entirely 
coppery reddish or violet, very seldom greenish . C. cuprrus, F. 
(v. eruginosus, Germ.) 
2. Antenne obtusely serrate; thorax very obsoletely 
channelled, 
A. Form larger and less parallel-sided ; punctua- 
tion of thorax coarse and strong. . . . . 
B. Form smaller and more parallel-sided ; punc- 
tuation of thorax vury close and fine . . . . C. Quercus, @yll. 
C. TESSELLATUS, F. 
