MADARUS. 367 
3. Madarus heterosternus, sp.n. (ab. XVIII. figg. 27, 274, 9.) 
Oblong-rhomboidal, broad, flattened above, glossy-black, glabrous. Head very finely punctate; rostrum 
stout, arcuate, rather longer than the head and prothorax, the antenne inserted at about the middle, the 
antennal club oblong-ovate. Prothorax conical, feebly constricted in front, deeply sinuate at the base, 
the median lobe rounded at the apex and greatly produced ; sparsely, very finely punctate. Scutellum 
arcuate. Elytra depressed before and behind the swollen humeri, faintly lineato-punctate, the sutural 
and outer strive alone visible, the interstices with scattered excessively minute punctures. Pygidium 
coarsely punctate. Beneath with fine widely scattered punctures. Prosternum somewhat tumid between 
the coxe anteriorly, and with a very deep transverse subapical fovea, in the centre of which is a trans- 
verse tubercle, the basal process (fig. 27 «) deeply triangularly emarginate behind and completely bare. 
Femora clavate, unarmed. 
Length 84, breadth 4,4, millim. (2.) 
Y 
Hab. GuateMata, Cerro Zunil, Pacific slope (Champion). 
One female. Extremely like M. corvinus, and only separable therefrom by the 
obliquely narrowed prothorax, with longer median lobe, the distinct sutural stria, the 
glabrous prosternal process, and the more coarsely punctured pygidium, the subapical 
fovea of the prosternum enclosing a transverse tubercle. 
4, Wadarus cornix. (Tab. XVIII. figg. 28, 28a, ¢.) 
Madarus cornix, Kirsch, Berl. ent. Zeitschr. 1869, p. 219°. 
3. Fifth ventral segment sinuato-truncate at the apex (leaving the pygidium narrowly exposed beneath) ; 
antenne inserted beyond the middle of the rostrum. 
Q. Fifth ventral segment rounded at the apex (the pygidium scarcely visible from beneath); antenn inserted 
at about the middle of the rostrum, the apical portion slightly narrowed. 
Hab. Mexico, Misantla (Godman); Nicaragua (Sallé), Chontales (Belt); Panama, 
Bugaba, Volcan de Chiriqui (Champion).—CotomB1a, Bogota *. 
Of this species we have obtained nine specimens from within our limits. It is 
smaller and narrower than JZ. corvinus; the median lobe of the prothorax is truncate ; 
the scutellum is smaller; the elytra are less dilated at the shoulders, obsoletely 
punctate-striate, and with scattered excessively minute punctures in the interstices ; 
the prosternum is, at most, feebly bifoveate near the apex, and the basal process is bare 
and not so deeply emarginate. The type (2) has been kindly communicated by 
Dr. Heller for comparison. 
5. Madarus chiriquensis, sp. n. (Tab. XVIIL figg. 29, 29a, 2.) 
Elongate, somewhat fusiform, glossy-black, glabrous. Head finely punctate, transversely depressed between 
the eyes; rostrum strongly arcuate, a little longer than the head and prothorax, abruptly thickened and 
closely punctate in its basal fourth, for the rest slender and almost smooth, the antenne inserted near 
the base. Prothorax transverse, rather convex, constricted and much narrowed in front, the sides 
strongly rounded anteriorly and parallel at the base; very sparsely, minutely punctate. Scutellum 
concave. Elytra gradually narrowing from the base, transversely depressed anteriorly; very finely 
lineato-punctate, striate at the apex, the interstices each with a single row of excessively minute 
punctures. Pygidium densely punctate, rounded at the tip, nearly as long as broad. Beneath sparsely 
and rather coarsely punctate, a broad space down the middle much smoother. Prosternum deeply bifoveate 
