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Show 386 INSECTA. but very slightly in both sexes; the length of the last joint is never much gt·eater than that of the preceding ones. C.e rtain species do . gt·eat injury among furs, and devastate our col. lectwns of natural histor.y . De Geer. calls them dissectors , an d.t n fact the Dermestes lardarzus cuts to pieces the Insects of the cab' ·m to whi· c h I· t has penetrate d • Th e others devour the dead bodiemsoetf all kinds of animals. D.lardarius, L.; Oliv., Col., II, 9, 1, 1. Black; baseofthe ~lytt·a .cinereous and dotted with black. The larva is elongated, msensibly tapered from head to tail, of a chesnut-bl'own above white beneath, furnished with long hairs and two squamou; horns on the last annulus. Its excrements resemble long threads( 1 ). MEGATOMA, Herbst. Lin. Geoff. Fab. The Megatomre only differ from Dermestes in the club of their antennre, which is much more elongated in the males than in the females; the terminal joint is lanceolate or forms an elongated tri· angle. M. pellio; Dermestes pellio, L.; Oliv., lb., II, ii. But two lines and a half in length; black; three white dots on the thorax, and one on each elytron, formed by down. The larva is greatly elongated, of a glossy reddish-brown, and covered with reddish hairs, those of the posterior extremity forming a tail. It moves hy sliding, and as if by jerks, which is also the case with the perfect Irisect, and the Dermestes(2). In others, such as LIMNIOHus, Zieg. Dej., . The antennre become gradually thicker, and terminate in a larger and ovoid joint; they are granose, and received under the anterior angles of the thorax. The maxillre are terminated by two lobe~ the exterior of which is narrow and palpiform. The labial palpi are very small; the last joint of those of the maxillre is larger than the preceding ones and ovoid(3). In all the following subgenera, the antennre, or at least their club, are received into particular and lateral cavities in the under partof (1) Add D. vulpinus, murinus, ajfinis, laniarius, tesselatus, trifaJciatua, Gyll, Insect. Suec., I, p. 145, et seq. ( 2) Add the Dermestes megatoma, Fab., of which his macellarius appears to be the fema1e ;-D. emarginatus, Gyll. ;-D. undatus, Fab. The pr~sternum in th~ latter species projects over the mouth. (3) Byt·rhus sericeus, Duft.; B. pygmte'U8, Sturm. COLEOPTERA. 3B7 the thorax. The prresternum is always dilated or projected forwards in the manner of a chin-cloth. Here, the antenna! club is perfoliaceous and not ~olid. In ATI'AGENUS, Lat.-Megatoma, Lat.-Dermestes, Fab. The club is very large, almost serriform, and composed of three joints, of which the first and last, particularly in the males, are the longest. The body is ovoid, short, and but slightly convex. The last joint of the maxillary pal pi is larger and ovoid( 1 ). TRoGODERMA, Lat., Dej.-.Onthrenus, Fab. Antenna! club quadriarticulated at least; body ovoid and oblong; palpi filiform(2). The antenna! club is now solid or formed of crowded joints. The body is ovoid, short, and completely covered with little deciduous scales. The thorax is lobate posteriorly. In ANTHRENus, Geoff. Fab.-Byrrhus, Lin. The antennre, terminated by a club in the form of a reversed cone, are received into short cavities under the anterior angles of the thorax. These Insects are very small, living on flowers in their perfect state and in that of larvre devouring desiccated animal matters, insects particularly. The larvre are oval anu furnished with hairs, some of which are dentated, forming tufts; the last are prolonged posteriorly into a kind of tail. Their final exuvium serves as a cocoon for the chrysalis. .fl. verbasci; Byrrhus vet·basci, L.; Oliv., Col. II, 10, 1, 2, Grey above, reddish-yellow beneath; the two angles of the thorax, two transverse bands on the elytra, and a spot near their extremity, grey(3). GLoBIOORNis, Lat. The antennre terminating in a globular club, and received into fossulre extending to near the posterior angles of the thorax( 4). (1) Dermutes &erra, Fab.; .!J.ttagenu& serra, Lat., Hist. Nat. des Crust. et des Insect, IX, p. ~44; Megatoma serra, Id., Gener. Crust. et Insect., I, viii, 10; .!l1Jthre· n11.1 viennen8is, Herbst., Col. VII, cxv, 10, k. (2) /lnthrenus elongatus, Fab.; JJ.. ruficornis, Lat. Gen. Crust. et Insect. • II, P· 59;-/1.. versicolor, Creutz., }~nt. Vers., I, ii, 21, a;-Dermestu subfaaciatua, Gyll., Insect. Suec., J, p. 155. (3) See 01iv., lb., and Fabricius, Syst. E1eut., I, p. 106. (4) Megatoma rufitarsis, Lat., Gener. Crust. et insect., II, p. 35; Dermestes 1'Ufi· tar1ia, Panz., :Faun. Insect. Germ., xxxv, 6. |