COLEOPTERA. "^49 



Rhaghim, Dahl. [and the three following-, having wings in both sexes], lias the antennae simple, not more than half 

 the length of the body, and the last joint of the palpi forms a triangular mass. The head is large, nearly square, 

 with the eyes entire ; the sides of the thorax have a triangular tubercle. \_R. hifasciatum, and two or three other 

 British species.] 



Rhamnusium, Meg., has the antenna; rather shorter than the body, serrated, with the third and fourth joints 

 shorter than the following; the eyes are evidently emarginate. R. Salicis, Fab., [an European species]. 



Tojro/i/* (and Prtc/rv<a, Dej.), has the antennjB at least as long as the body, simple, with the basal joint much 

 shorter than the head ; the eyes are entire, or very slightly emarginate. 



Euriptera, Serv. & Lep., has the antenn£e 12-jointed. [A Brazilian insect.] 



Distenia and Cometes, Serv. & Lep., have the thorax spined at the side, palpi short, antennae villose. The 

 former has the elytra narrowed and terminated by a spine, in the latter they are linear and unarmed. Both are 

 Brazilian. 



Stenoderus, Dej., has the antennae long, the basal joint at least as long as the head, and the body long, narrow, 

 and linear ; the eyes are entire. [Kxotic insects]. 



In the other species the head is suddenly narrowed immediately behind the eyes; the antennae, inserted near 

 the anterior extremity of their internal notch, are wide apart at the base ; the two prominences from which they 

 spring are nearly on the same plane ; the thorax is mostly entire at the sides. Tliese form the genus — 



Leptura proper, some of which have the thorax conical, as in Lept. aniiata, Gyll. (L. calcarata, Fab.), [a very 

 common British species, of a black colour, with yellow marks in the elytra], whilst in others the thorax is nearly 

 globular, as in L, tomentosa, [another common British species, of smaller size and black colour]. 



THE FIFTH FAMILY OF THE COLEOPTERA TETRAMERA,— 

 The Eupoda, — 

 Is composed of insects, the first of which (the Donacice) so closely approach the last of the Longicornes, 

 that Linnffius and Geoffrey united them together, and the last of which are so close to the Chrysomelae, 

 the types of the following family, that the first of these naturalists placed them in this genus. The 

 parts of the mouth exhibit the same relations : thus, in the first, the tonguelet is membranous, bifid, 

 or bilobed, as in the Longicornes ; the maxillae also greatly resemble theirs ; but in the terminal 

 EupodcC the tonguelet is nearly square or rounded, like that of the Cyclica. The lobes of the maxillae 

 are however membranous, or but slightly coriaceous, whitish, or yellowish ; the exterior is dilated at the 

 tip, and has not the appearance of a palpus, which thus more nearly resembles that of the Longicornes 

 than of the CycUca. The body is more or less oblong, with the head and thorax narrower than the 

 abdomen ; the antennae are filiform, or thickened at the tips, and are inserted in front of the eyes, 

 which in some are entire, round, and prominent, and in others slightly notched; the hind part of the 

 head enters into the thoracic cavity ; the thorax is cylindrical or transversely square ; the abdomen is 

 larger compared to the other parts of the body, oblong, or in the form of a long triangle ; the joints of 

 the tarsi, except the last joint, are cushioned beneath, and the penultimate joint is bifid or bilobed ; 

 the hind legs are thickened in a great number, whence the origin of the family name. All these insects 

 have wings, and fix themselves to the stems or leaves of plants, more especially to the Liliaceae in respect 

 to many of our native species; the larvaj of some (DonacicB), devour the interior of the stems of water 

 plants, upon which the perfect insect is found ; those of others feed externally, but covered with their 

 own excrements, which forms a kind of mantle, as in the Cassidae. 



We divide this family into two tribes, [Sa^rides and Criocerides]. 



The first, Sagrides, is composed of the genus — 



Sagra, — 

 The mandibles of which terminate in an acute point. The tonguelet is deeply bilobed. Some have 

 tiie palpi filiform, the eyes emarginate, and the hind thighs very thick, with the tibiae curved. 



Megalopus, has the front of the head produced into a muzzle ; the mandibles strong and crossing each other ; 

 the antenna; are thickened at the tips. Handsome Brazilian beetles. See the monographs of Klug, !\lannerheini, 

 [andGistl]. 



Sagra, Fabr. [first named Aliirnus], is exclusively confined to South Africa, Ceylon, [Java], and China, and 

 has the palpi terminated by an ovnid joint, the antennas nearly filiform, and the four anterior tibiae straight ; they 

 are splendidly coloured, being golden, green, or copper-coloured. 



The others have the palpi thickened at the tips, the eyes entire, and the thighs of nearly eijual thickness ; the 

 body is narrow and depressed. 



Orsodachna, Latr., has the antennae filiform, composed of reversed-conical joints; the last joint of the palpi alone 

 is rather larger than the preceding, and nearly of an ovoid truncate shape. [Several small British species.] 



Psainmoecus, Boudier [Cri/pta, Kirby], has the antenna' composed of short joints, thickening to the tips, and 



