COLEOPTERA. 14] 
the Chrysomele, Galerucee, &c. expel a yellow mucilaginous 
humour of a penetrating and disagreeable odour, from the arti- 
culation of the thighs with the tibiz. They feed on Aphides, 
their larvee, which in form and their metamorphoses greatly re- 
semble those of the Chrysomele, employing the same aliment. 
According to the observations of M. Leon Dufour, they are pro- 
vided with salivary vessels. 
Individuals, very different as to colour, are sometimes found 
in coitu—the result of this intercourse, however, has never been 
observed. 
C. 7-punctata, L.; Oliv., Col. VI, 98, i, 1. Length, three 
lines; black; elytra red, with three black dots on each, and a se- 
venth, Goranion to both, underneath the scutellum. The most 
common species in France. 
C. 2-punctata, L.; Oliv.,Ib., vii, 104. All black, with a short, 
red, transverse band on the elytra *. 
There, the body is much flattened, in the form of a shield, and the 
head is concealed under an almost semicircular thorax. The antennz 
present distinctly but nine joints, and terminate in an elongated club. 
The joints of the tarsi are entire. The presternum forms a sort of 
chin-cloth anteriorly. 
Such are the characters of the genus 
Criypraster, <ndersch.—Cossyruus, Gyll. 
They are found under the bark of trees, and under stones f. 
FAMILY III. 
PSELAPHII f. 
These Insects, which constitute our third and last family of the 
Trimera, in their short, and truncated elytra that only cover part of 
the abdomen, bear a certain resemblance to the Brachelytra, and par- 
ticularly to the Aleocharee. This last part of their body, however, is 
much shorter, wide, very obtuse and rounded posteriorly. The an- 
tennz, terminated by a club, or. thicker towards the extremity, some- 
times consist of but six joints. The maxillary palpi are usually very 
large, and all the joints of the tarsi are entire ; the first, much shorter 
* For the other species, see Oliv., Ib.; Scheenh., Synon. Insect., II, p. 151, and 
Gyllenh., Insect. Suec. The genera Scymnus and Cacidula, separated from the pre- 
ceding one, do not appear to me to be sufficiently distinct from it. 
+ See Schenherr and Gyllenhall. One species, the C. pusillus, Dej., is figured by 
Ahrens in his Faun. Insect. Europ., fascic., VIII, t. X. 
+ But few Insects are now so well known as these. For this knowledge we are 
chiefly, indebted to the zeal and labours of MM. Reichenbach (Monog. Pselaph.), 
Muller (Mag. Entom. Germ.), Leach (Zoolog, Misc.), and Gyllenhall—Insect, 
Suec., IV, 
