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Show 562 JNSECTA. dage, somewhat dentated along its edges, and terminated by a small tooth( 1 ). DmoLIA, Lat.-olim .flltitarsus. Where the gt·eater part of the .head is sunk in the thot·ax, and the posterior tibice are terminated by a forked spine(2). In Altica pro. per ot· ALTioA, Lat. The head is salient, and the posteriot· tibice are truncated at their extremity and without any particular prolongation or forked spine; the tarsus originates from this extremity, and its length is not equal to half that of the tibia . .fl. oleracea; Cltrysomela oleracea, L.; Oliv., Col., VI, 93, bis, i", 66. About two lines in length; oval, elongated; green or bluish; a transverse impression on the thorax; elytra finely punctured. On vegetables. It is the largest of the European species. .11. nitidula; Chrysomela nitidula, L.; Oliv., lb., V, 80. Green; head and thorax golden; legs fulvous.-On the Willow(3). LoNGITARsus, Lat. All the characters of Altica proper or of the preceding subgenus, but the posterior tarsi are at least as long as the tibice to which they are attached( 4 ). FAMILY VII. CLAVJPALPI. The Insects of our seventh and last family of the Tetramera are distinguished from all those of the same section, having, ( 1) The ninth family, or the Jlltitarsi, Illig., comprising the following species of Gyllenhall: chrysoceplwla, napi, hyosciami, dulcamarm, affinis. Those, which he calls dentipes, m·idella, and some others in which the posterior tibia: arc dilated near the middle of their posterior bide in the form of a tooth, with a canal beneath, longitmEnal and ciliated along the edges, might constitute a scp:trate subgenus. (2) The eighth family, the .11. Echii, Oliv., and the .11. occultans, Gyll. ( 3) The 3, 4, 5, 6, families of the same. (4) The seventh, such as the .11. lurida, atricilla, quadripustulata, dorsalia, hol· satica, parvula, anchusre, atrot, of Olivier, Gyllenhall, &c. t:OLEOPTERA, 563 like ·t hem, th·e h u nder part of the three first J· 0•m t s of tl 1e tarst. fur~Ished Wit br~shes , and the penultimate bifid(!), by the1r .a ntennro, wluch are terminated in .... ve ry d't st·m ct and p. erfoha.t ed club, as .w ell as by their m'a x·1)]o~n, armc d on the m..n er side by a . nad or .c orneous tooth · In ·s o me ~•' ew, t 11 e · JOintS of the tars1 a.re entire, but they are removed fr·om the other Tetramera With analogous tarsi by their body, which is almost globular and contracts into a ball. Their body is most commonly of a rounded form, and frequently even very convex and hemispherical; the antennre are shorter than the b?dy, the mandibles emarginated or d 1 entat~~ at thhe 1ext~·e~mty, and the pal pi terminated by a arge JOint; t e ast JOint of the maxillary pal pi is very large, transversal, compressed, and almost lunate. The form of their organs o~ m.an~ucation shows them to be gnawers, and in fact the speCies md1genous to Europe are found in the Boleti which grow on the trunks of trees, under their bark, &c. Some have the penultimate joint of the tarsi bilobate, and do not contract themselves into a ball. They may be reunited in the single genus EROTYLus, Fab. Here, the last joint of the maxillary palpi is transversal, and almost lunate or securiform. EROTYLus, Fab. In the Et·otyli properly so called, and from whic.h the .JEgithi, Fab., do not appear to us to be essentially distinct, the intermediate joints of the antennce are almost cylindrical, and the club, fot·med by the last ones, is oblong; the interior and corneous division of their maxillce is terminated by two teeth. They are peculiar to South America(2). (1) The last has a knot at base, a character also ob.servecl in the Coccinel1a:. (2) See Oliv., Col., V, 89; Schcenh., Synon.Inscct., II, genera JEgithus, Erotylu8; and the Monograph of this genus by M. J)uponchel, who has continued the work of Godart on the Lepidoptera of France, inserted in the M~moires du Museum d'Histoire Naturelle. |
