HETEROMERA. 495 
13 (s). Asida tenebrosa, (Tab. XXII. fig. 12.) 
Oblong-oval, rather broad, depressed, dull black, almost glabrous. Head sparsely, finely punctate between 
the eyes, more coarsely so in front; prothorax much broader than long, wider at the base than at the 
apex, the sides rounded at the middle, obliquely converging in front, and converging behind, the disc 
feebly transversely convex, sparsely, finely punctate, the base, apex, and lateral portion coarsely punctate, 
the margins horizontally expanded, thin, the apex deeply emarginate, the anterior angles sharply produced 
in front, the base broadly subtruncate, feebly emarginate in the middle, the hind angles subrectangular ; 
elytra a little rounded at the sides, widest at the middle, the width of the prothorax at the base, with a 
marginal carina extending from the obtuse humeri to about one-third from the apex, and three indistinct 
longitudinal ridges on the disc, the rest of the surface with very shallow, scattered, coarse punctures and 
shallow, irregular, transverse or oblique wrinkles, each puncture with a yellowish scale, the base broadly 
truncate, the sutural region flat ; beneath very sparsely punctate, the ventral surface finely scabrous, 
distinctly punctured at the sides and apex; prosternum grooved between the coxs, declivous behind ; 
anterior tibie denticulate on their outer edge, and with a long spine at the apex. 
Length 154, breadth 73 millim. 
Hab. Mexico, Saltillo in Coahuila (Hége). 
One specimen. Allied to A. spinimanus. ‘The surface is glabrous, except that each 
puncture bears a yellowish scale. 
14(a). Asida fasciculata. (Tab. XXII. fig. 21.) 
Black, opaque, thickly clothed with pale brown, appressed scaly hairs, the elytra with scattered fascicles of 
short, coarse, dark brown erect hairs. Head coarsely, confluently punctate ; prothorax feebly transversely 
convex, broader than long, not wider at the base than at the apex, the sides rounded at the middle, 
obliquely converging in front, and strongly sinuate behind, the anterior angles prominent, the apex deeply 
emarginate, the hind angles produced behind and overlapping the elytra, the base truncate in the middle 
and slightly sinuate on either side, the lateral margins thickened and a little raised, the surface coarsely, 
confluently punctate, the disc with a sharp median carina; elytra much wider than the prothorax at the 
base, widening to beyond the middle, abruptly narrowed behind, with a stout, undulating, marginal 
carina extending from the obtuse humeri nearly to the apex and a shorter very sinuous carina near the 
middle of the disc, the latter curving inwards towards the suture behind, and with an oblique ramus on 
the inner side at the base, the space between the suture and the dorsal carina flattened, the lateral 
portion uneven, the surface with coarse, scattered punctures and scattered fascicles of erect darker 
hairs; beneath coarsely, sparsely punctate, each puncture with a bristly decumbent hair; prosternum 
exceedingly broad, slightly produced, declivous behind ; legs very roughly punctured, the anterior tibie 
with a short tooth at the apex. . 
Length 12-153 millim. 
Hab. Mexico, Cuernavaca (Flohr, Hoge). 
Four examples. Closely allied to A. guanajuatensis, and, like that species, almost 
as well placed in Ologlyptus as in Asida, the trochantin of the middle coxe being 
moderately prominent. The thorax is more constricted at the sides behind than in 
A. quanajuatensis and has a sharp median carina; the elytra are carinate at the sides 
and have a sinuous, irregular, dorsal carina, the surface being clothed with scattered 
fascicles of dark brown hairs, which towards the sides are placed upon transverse or 
oblique elevations connected with the carine. <A. fasciculata closely resembles Astrotus 
regularis. 
38S 2 
