EPITRAGUS. 25 
rather coarsely punctured, the epistoma emarginate in front and not produced ; prothorax almost as long as 
broad, convex, widest at the base, the sides rounded and strongly narrowed in front, the hind angles not 
acute, the front angles obtuse, finely, very closely, and equally punctured, with a smooth narrow central 
line, and a shallow transverse impression near the base in front of the scutellum; elytra a little broader 
than the thorax at the base, rather short, and strongly convex, with regular rows of coarsish punctures, 
the interstices very closely, finely, and confusedly punctured. 
Length 10 millim. 
Hab. Panama, Tolé (Champion).—Cotomsta, Carthagena (coll. F. Bates). 
One example from each locality. This species may be known by its short, broad, 
convex form, its dark colour, and the very fine close punctuation of the thorax and of 
the interstices of the elytra. 
Sect. 2. Epistoma produced and rounded in front. 
a, Sexes dissimilar ; the disc of the thorax in the female flattened or excavated, and 
often with a ridge on each side. 
5. Epitragus bicarinatus. (Tab. I. figg. 212, 22 4.) 
Oblong ovate, rather broad, brassy with a cupreous tinge, somewhat densely clothed with yellowish pubescence. 
Head long, closely and finely punctured, the epistoma produced and rounded in front,—in the female trans- 
versely impressed behind the eyes, the vertex raised in the middle and longitudinally convex, and the 
eyes feebly carinated within; prothorax—in the female smooth, shining, scarcely pubescent, very sparingly - 
and finely punctured, broader than long, narrowing from the base forwards, the lateral margins thickened 
and reflexed and a little sinuate towards the front, the anterior angles very prominent, acute and parallel, 
the hind angles acute, prominent, and outwardly directed, the base bisinuate, the disc with a prominent 
oblique ridge on each side extending to the anterior margin and enclosing a long scutiform depression, on 
each side, a little before the middle, between the elevations and the lateral margin a deep rounded 
impression, the anterior margin a little raised and emarginate between the elevations,—in the male 
closely and finely punctured, not smoother or less pubescent than the elytra, about as long as broad, the 
lateral margins not thickened, the angles acute and prominent, with an indistinct central channel, the 
disc flattened in front, and with a shallow impression at the base in front of the scutellum ; elytra broader 
than the thorax, scarcely narrowing behind, very closely and finely punctured. 
Length 124-133 millim. (¢ 9.) 
Hab. Mexico, Vera Cruz (Sallé), Almolonga and Jalapa (Hége). 
Sent in plenty by Hége, and labelled E. dicarinatus, Chev., in the Sallé collection. 
The sexes of this species are so dissimilar, that I, at first, felt some hesitation in 
considering them as of one species; Hége sent numbers of each from both localities. I 
have dissected a large number of examples, and find that those with the thorax ridged 
are females, and those with the thorax simple males. The males of the allied E. acutus, 
Lec., E. arundinis, Lec., and E. canaliculatus, Say, are stated by Leconte to have the 
thorax ridged; but in the allied Central-American species I find the reverse to be the 
case. The female of EZ. dicarinatus may be known at once from its allies by the structure 
of the long exserted head, and by the smooth, shining, acute-angled and ridged 
thorax. 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 1, August 1884. EE 
