Coleoptera. Vol. I. [Longicornia. Part I.]

26 CERAMBYCID.i;.are undoubtedly, as M. Lanieere maintains, a primitive group, buthave not, in my opinion, any direct or close relationship with theOantharocnemini. The latter I consider to be somewhat secondarilymodified forms of true Prionince, and as such I place themhere. The group is almost entirely confined to the African region,the only species known to occur outside Africa being a very rareone found near Bombay and also in Ceylon.Genus CANTHAROCNEMIS.Cantharocncims, Serville, Ann. Soc.Ent. Fr. i, p. 132 (1832) ;Lucord.Gen. CoUopt. viii, p. 32 (1869).Type, C spondyloides, Serv., an African species.Range. Bombay, Ceylon and Africa.In form rather short and robust. Head broad, with the frontvery short and obliquely sloped, the clypeus transversely depressed,the eyes transverse, scarcely emarginate in front ; mandiblesstrong, sometimes falciform and emarginate at the apex inthe male. Antennse robust, variable in length, but generallymuch shorter than the body in both sexes, 11-jointed ; first jointthick, rather short, slightly curved, thickened towards the end ;joints third to tenth subequal, angulate at the apex, eleventhlonger than the tenth. Prothorax transverse, its lateral edgesproject in an angle at a greater or less distance from the baseand converge thence more or less gradually towards the a])ex.Elytra rather short, convex, rounded at the apex, broader in frontthan the base of the prothorax. Legs stout, somewhat compressed ;femora a little broader in the middle ; tibiae enlai-ged at tlie distalend, with very prominent dentiform outer angle, especially in theanterior two pairs, the external margin of each armed with avariable number of teeth ; tarsi moderately long, with the firstjoint rather narrow, glabrous underneath at the base and alongthe middle, third biiobed but with the lobes very short in someof the species. Intercoxal part of prosternum strongly iirehedin front, sloped posteriorly with its end resting in a depression ofthe mesosternum ; mesosternal process narrow.This genus of Prlonincn may be readily distinguished from allothers occurring in the Indian region by the exceptional form ofthe tibiae, which, with their prominent dentiform outer angle andtoothed external border, somewhat resemble those of the Lncanidce.Apart, however, from this character and the tendency to a greatabbreviation of the antennae, the genus conforms with the normalPrionid type and there appears to be no good reason forregarding it as a particularly aberrant member of the family.:23. Cantharocnemis downesi, Pasc Trans. Eat. Soc. (2) iv, p. 236(1858).Reddish brown, varying to a some\\-liat darker tint. Headsparingly punctured on the vertex, closely and rugosely on the