OPHRYASTES. 89 
1. Ophryastes latipennis, sp. n. (Tab. IV. fig. 2.) 
Latior, griseo-obscurus ; prothorace ad latera angulariter dilatato, grosse rugoso-sculpturato; elytris parum 
profunde striatis, interstitiis nullo modo convexis, striis fortiter punctatis. 
Long. 16 millim, 
Hab. Mexico, Chihuahua city, Villa Lerdo in Durango (Hage). 
Rostrum transversely impressed at the base; median groove very broad; lateral 
grooves short, abruptly terminated above by the transverse impression. Thorax very 
short and broad, with very coarse irregular sculpture; the lateral dilatation becoming 
gradually broader till near the base, where it ceases very abruptly, leaving an angular 
projection ; basal marginal band of tomentum very broad. The exposed apex of the 
scutellum broad and short. Llytra very broad at the shoulders, of a uniform dark grey 
colour, the sculpture consisting of series of rather large punctures, the interstices broad. 
Tarsi stout, scaly beneath, the angles of joints 1-3 forming short horny projections. 
Two specimens. 
This species may be readily distinguished by the very broad elytra, the angular 
form of the lateral projection on the thorax, and the very coarse sculpture of the latter 
part. 
2. Ophryastes strumosus. 
Dystirus strumosus, Pasc. Journ. Linn. Soc., Zool. xi. p. 447, t. 18. fig. 103. 
Hab. Mexico!, Arroyo Zarco (Sal/é). 
We have received only one example that I can refer to this species. It has a 
depression, though only a slight one, at the base of the rostrum; the thorax coarsely 
and irregularly sculptured, the lateral expansion feebly bilobed, not angular behind ; 
the elytra not striate, but with rows of deep, remarkably definite, broadly separated 
punctures. 
3. Ophryastes basalis, sp. n. . 
Angustus, fusco-griseus, submaculatus; prothorace ad latera bilobo-dilatato, parcius sculpturato; elytris pro- 
funde sat fortiter remote punctatis, interstitiis subconvexis. 
Long. 104 millim. 
Hab. Mexico, Arroyo Zarco (Saillé). 
This species bears a general resemblance to 0. strwmosus, but differs by some very 
important characters: there is no constriction or depression at the base of the rostrum 
and the shoulders of the elytra do not stand out at all laterally. The base of the 
thorax has the marginal part less definite than usual, and considerably extended in the 
longitudinal direction. The median groove on the rostrum is moderately deep, and 
terminates abruptly without extending on to the head; the lateral grooves are quite 
short. The fimbrie of the ocular lobes are scanty. One example. 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 3, October 1891. NN 
