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Show 568 INSECTA. 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 seventh, common to both, underneath the scutellum. The most common species in France. C. 2-punctata, L.; Oliv., lb., vii, 104. All black, with a short, red, transverse band on the elytra( 1 ). Thete, the body is much flattened, in the form of a shield, and the head is concealed under an almost semicircular thorax. The antennre present distinctly but nine joints, and terminate in an elan. gated club. The joints of the tarsi are entire. The prresternum forms a sort of chin-cloth anteriorly. Such are the characters of the genus CLYPEASTER, Andersch.-Cossyphus, Gyll. They are found under the bark of trees, and under stones(2). FAMILY III. PSELAPHII(s). 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 particularly to the Aleocharre. This last part of their body, however, is much shorter, wide, very obtuse and rounded posteriorly. The antennre, terminated by a club or thicker towards the extremity, sometimes consist of but six joints. The maxillary palpi are usually very large, (1) For the other species, see Oliv., lb.; Schcenh., Synon. Insect., II, P· 151, and Gyllenh., Insect. Suec. The genera Scymnus and Cacidula, separated from the preceding: one, do not appear to me to be sufficiently distinct from it. (2) See Schcenherr and Gyllenhall. One species, the C. pusillus, Dej., is figured by Ahrens in his Faun. Insect. Europ., fascic., VIII, t. X. (3) 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 Gyllenhalllnsect. Suec., IV. COLEOPTERA. 569 and all the joints of the tarsi are entire. th fi . than the following ones, is scarcely v' '.bl e rsth, much shorter • lSI e at t e first I and the last IS most commonly terminated b . g ance, They are found on the ground under th ydabsi~ple hook. bl tt • · h b' e e r1s of vegeta-e ma ers , . some m a 1t certain ant-hills. Those whwh have eleven J. oints in the an t enn~ form the genus PsELAPHus, Herbst.-Stanhylinus LI"n .f:J. th. F '.1' ' ·- n zeus, ab. In some few the tarsi are furnished with hooks. CHENNIUM, Lat. ~here the ten first joints of the antennce are almost equal and lenticular, and the eleventh or last is large1• d 1 I . . an near y globular The pa pi do not proJect( 1 ). · DIONix, Dej. \Vhere the third joint of the antennce and the £,,'0 ur 1£' 01 1 ow·m g ones ~re very small,_ transversal and granose; the eighth and three follow-mg ones are thicker than those which precede them ' cy 1m' d n·c a1 , and as lo. ng as the first seven taken together•, the two pen u It1' mates are co~tcal and equal; the last is ovoid, elongated, pointed, and the thickest of all. The maxillary palpi are very salient-but shorter ~h~n the head a~d thorax united-and consist of four cylindrical JOmts. The labtals are short, directed forwards and c · t r • • • , onSIS 0 three JOints with a point at the end(2). The others have but a single hook at the extremity of the tarsi. Here, the maxillary palpi, flexed or geniculated, are at least as long as the head and thorax; their second and fourth joint are much elongated, narrowed at base, and terminated in a club. Sometimes the antennre, evidently longer than the head and thorax terminate in a club formed by the three last joints, which are mani: featly larger than the preceding ones, the last being almost ovoid or ovoido-conical. PsELAPHus proper.-PsELAPHus, Herbst.(3) (1) Lat., Gener. Crust. et Insect. m, p. 77; a single species-bitubercu/atumextremely well figured in the atlas of the Diet. des Sc. Nat. (2) Jn this family, two of the palpi at least, are thus terminated. For this genus, see MM. Lepeletier and Serville, Encyc. M~thod., Entom., X, p. 221. (3) The Pselaphii Herbstii, Hieni, kmgioollia, dresdenns, &.c. of Reichenbach or his first family of this genus; the thorax is elongated. v OL. III.-3 w |
