220 LONGICORNIA, [ Cerambycide. 
I. Clypeus shorter; an‘erior coxa subglobose, not or only slightly 
prominent ; eyes nearly always strongly emarginate. . . . . CERAMBYCINA. 
II. Clypeus longer, often subquadrate; anterior coxx conical, 
strongly prominent; eyes almost entire or feebly emarginate 
(in ‘our genera) ergs) 5... LEITH re, | =: ote pel ie he A 
CERAMBYCINA. 
This family is represented in Europe by thirty-eight genera and about 
one hundred and thirty species; only eight genera and fourteen species 
are found in Britain; the formation of the clypeus and the anterior coxe 
seem to be the chief characters which distinguish them from the suc- 
ceeding tribe; our genera may be separated as follows:— 
I. Thorax with strong lateral spines. . . . . + . - » ABOMIA, Serv, 
Il. Thorax without lateral spines. 
i. Anterior coxal cavities open behind. 
1. Antennz inserted just above base of mandibles ; femora 
not or scarcely clavate; form stout and robust . . . ASEMUM, Lsch. 
2. Antenne inserted at some distance from base of man- 
dibles; femora more or less distinctly and strongly 
clavate, and often strongly petiolate. 
A. Anterior coxze widely separated . . . . . . . HyYLorrupss, Serv. 
B. Anterior cox contiguous or almost contiguous. 
a. Third joint of antenne evidently longer than 
fourth; thorax scarcely, if at all, longer than 
broad ; size larger. 
a*. Anterior coxal cavities rounded, not angulated 
externally) “.. <> 2atat tp ee eee . CALLIDIUM, F. 
b*. Anterior coxal cavities transverse, very strongly 
angulated externally . Si ED? 1 (dh ea pon DC 
b. Third joint of antennz almost shorter than fourth ; 
thorax plainly longer than broad, subcyiindrical ; 
eizewvery small se es dw ee 8 GRACILIA, Serv. 
ii. Anterior coxal cavities closed behind. 
1. Abdomen with the first segment elongate; elytra 
covering abdomen . Sertich oi ms ee Aris 
2. Abdomen with the first segment not elongate; elytra 
Abbreviated 2 A) edie Gaile) Ate ets e) s+ ae, MIODOROBDE, T, 
Critus, Laivh. 
Osrium, Latr. 
AROMIA, Serville. 
This genus contains one species, which is widely distributed in Europe, 
and is not uncommon on willows in various parts of Britain; it is remark- 
able for the strong-scented odour which it emits, on account of which it 
is called the “‘musk beetle;” this name, however, is erroneous, as the 
fragrance is much sharper and pleasanter than musk, to which, in fact, 
it bears very little resemblance ; it is the only member of the sweet 
scent-emitting group that is found in Britain; the allied genus Cadli- 
chroma contains a large number of exotic species, in some of which the 
odour is very strorg; it is apparently more or less of a sexual character, 
and exercises a mutually attractive power, as it is present in both sexes, 
although it is believed, as a rule, to be more powerful in the female. 
