Cerambyzx.| LONGICORNIA. 229 
(CERAMBYX, L. (Hammaticherus, Meg.) 
As one or two species belonging to this genus have been found in 
Britain, it may perhaps be as well to shortly point out its characters : 
the specimens taken, however, have undoubtedly been imported in the 
larval state in timber; they are very large and conspicuous inseets with 
the antenne longer than the body, clothed with silky pubescence, and 
subserrate, with the third to the fifth joints clavate at apex; the anterior 
coxal cavities are open behind; the thorax is rugose, and armed with a 
lateral spine on each side ; the elytra are convex and rugose, and the 
legs are long, with the intermediate tibiw simple; the larva of C. heros 
is very large, thick, and fleshy, and has been supposed by some authorities 
to be the Cossus of the ancients, which was much esteemed as a delicacy ; 
it bores into solid oak, to which it often does great damage, and ‘is 
therefore easily exported in the logs. 
The genus is not a very extensive one, but is very widely distributed 
in both tropical and temperate countries; two, apparently, have been 
found in Britain. 
I. Elytra narrowed towards apex, with the sutural angles mu- 
CLOHMDEs ae enas ol ee a oe een hme ale Wa allo off OseReROS cap: 
II. Elytra not narrowed towards apex, with the sutural angles 
DOG PMUCTONALE! SPS t Tee ae at ep acne ech oe ge) oy ae OE CER DOM TZ: 
C. heros, Scop. Oblong, gradually narrowed behind, black or pitchy 
black, upper surface almost glabrous; head with a deep channel; thorax 
with a spine at sides; elytra rugose, with the apex smoother, and with 
two obsolete elevated lines on each; the colour of the elytra is some- 
times lighter than that of the head and thorax, and the apex is usually 
lighter; antenne and legs black. L. 30-40 mm. 
Male longer, with the antenne almost twice as long as the body. 
Female smaller, with the antenne a little shorter than the body. 
In oak; recorded from Devonshire, Colney Hatch, and Portsmouth Dockyard ; 
Deal, Aug. 18&2 (C. G. Hall). 
C. cerdo, L. Very like the preceding, but differs in having the 
elytra slightly pubescent, not narrowed towards apex, with the apex 
concolorous, and with no raised lines; the sutural angle is not mucro- 
nate; the mandibles, which in the former species are sinuate on their 
lower margin before the apex, are in this species not sinuate; in the 
female the antennz are slightly longer; the general size is smaller. LL. 
20-33 mm. 
On willows, and also on hawthorn blossom ; recorded from Deptford and the Isle 
of Ely; it will be noticed that both species have occurred in dockyards, but have 
been found also in other localities ; if all the species that bave been found in dock- 
. P . 
yards were recorded, they would be found to amount to a considerable number.) 
