100 HETEROMERA. 
1. Centronopus suppressus. (Tab. V. fig. 9, ¢.) 
Tenebrio suppressus, Say, Boston Journ. Nat. Hist. i. p. 187 (1835)'; Lec. Complete Writings 
of Thomas Say, i. p, 659. 
Centronopus extensicollis, Sol. Studi Ent. p. 260, t. 11. f. 4-8 (1848) ; Chevr. Dej. Cat. p. 226. 
Hab. Mexico ! (coll. F. Bates), San Antonio de Arriba, Orizaba (Sailé), Las Vigas, 
Cordova (Hége). 
Captured in great abundance by Herr Hoge. The specimen figured by Solier is 
probably a female; we now figure the male. 
2. Centronopus grandicollis. 
Centronopus grandicollis, Sturm, in litt. 
Elongate oval, depressed, black, slightly shining. Head finely and very closely punctured,—in the male the 
anterior margin rounded and reflexed, in the female the epistoma is truncate in front and the anterior 
margin scarcely reflexed; prothorax broad, transverse, the basal and lateral margins prominent and 
reflexed, the sides rounded, slightly narrowed and sinuate before the base, the hind angles very 
prominent (owing to the broad emargination of the base) and subacute, the disc broadly but feebly im- 
pressed before the base, finely, closely, and shallowly punctured ; elytra long, depressed, feebly rounded 
at the sides, widest about, or a little behind, the middle, the sides abruptly narrowed just before the base, 
finely punctate-striate, the interstices flat and with exceedingly fine scattered shallow punctures or smooth, 
the strize sometimes obsolete. 
Length 144-16 millim. (¢ @.) 
Hab. Mzxico (coll. F. Bates, Sallé, ex coll. Sturm), Jalapa (Hoge), Hacienda de San 
Miguelito (Dr. Palmer). 
Found in some numbers by Dr. Palmer. Smoother and duller than C. suppressus, 
the elytra very finely or obsoletely punctate-striate. 
PYRES. 
Near Centronopus, Sol. Mentum (as in that genus) trilobed, small, feebly transverse, longitudinally convex and 
raised in the middle infront; antenne short, joints 7-11 wide and in the form of a club, sixth and seventh 
joints triangular and wider than the preceding, eighth to tenth broad and transverse, eleventh large and 
broad and rounded at the apex; head much as in Centronopus but narrower, the sides of the front 
less divergent, and the eyes not so widely separate, the anterior margin in the male rounded and 
reflexed, in the female the epistoma truncate and the margin slightly swollen; prothorax strongly 
transverse, the lateral margins reflexed and prominent, closely embracing the elytra, hind angles sub- 
acute and prominent ; scutellum large, scutiform; elytra wider than the prothorax, subparallel, punctate- 
striate; epipleure narrowing gradually from the base, obsolete before the apex; legs much as in 
Centronopus :—in the male the anterior tibize have on the inner side a triangular tooth near the middle, 
between which and the apex emarginate, the apex only (not the whole of the emargination as in 
Centronopus) clothed with hair, the intermediate tibie strongly curved inwardly and swollen at their 
apices, the posterior tibiee slightly swollen a little before the middle, the outer edge of all the tibie 
rounded, the basal half of the posterior femora beneath not densely clothed with short hair (as in 
Centronopus), almost glabrous; in the female the tibiz are simple and almost glabrous beneath; 
prosternum declivous behind, longitudinally grooved on each side, the centre convex; intercoxal process 
narrower than in Centronopus, pointed and not rounded in front; upper surface highly polished and of 
bright metallic colours. 
