500 SUPPLEMENT. 
of the marginal one; the fine, conical, irregularly arranged elevations on the elytra 
resemble punctures at first sight. 
23 (z). Asida latissima. (Tab. XXII. fig. 18.) 
Very broad, oblong-oval, black, shining, almost glabrous. Head deeply, transversely impressed in front, 
sparsely, rather coarsely punctate ; prothorax broader than long, strongly rounded at the sides, moderately 
narrowed in front, deeply emarginate at the apex, the disc transversely convex, sparsely, minutely punc- 
tate, the lateral margins crenulate, broadly expanded, rather thin, and very deeply grooved and trans- 
versely wrinkled within, the anterior angles sharply triangular, the hind angles almost rounded, the base 
transversely depressed in the middle and somewhat rounded; elytra the width of the prothorax at the 
base, rounded at the sides, widening to the middle, transversely convex, with a very sharply raised 
marginal carina extending from the obtuse but prominent humeri to a short distance from the apex, the 
base shallowly emarginate, the entire surface sparsely, coarsely punctate ; beneath sparsely, finely punctate, 
the ventral surface also longitudinally wrinkled; prosternum grooved in the middle between the coxe, 
declivous behind; anterior tibie sharply toothed at the apex. 
Length 23, breadth 13 millim. 
Hab. Mexico, Villa Lerdo in Durango (Hége). 
One example. Belongs to the Euschides-group, but broader than any of the allied 
species known to me. ‘The lateral margins of the thorax are broadly expanded, and 
very deeply grooved and transversely wrinkled within. 
24 (as). Asida horrida. (Tab. XXII. fig. 13.) 
Oblong-oval, rather broad, pitchy-brown, opaque, thickly clothed with yellowish decumbent hairs, the elytra 
with intermixed long, erect, bristly hairs. Head thickly, coarsely punctate; prothorax broader than 
long, narrower at the apex than at the base, the sides strongly rounded at the middle, obliquely con- 
verging in front and behind, the apex deeply emarginate, the anterior angles produced in front, the 
hind angles distinct but not prominent, the base rounded, transversely depressed in the middle, the 
disc strongly transversely convex, coarsely, rather thickly punctate, and with indications of an impressed 
median line, the lateral margins reflexed and crenulate, rather broadly expanded, somewhat deeply 
grooved within ; elytra a little wider than the prothorax, flattened on the disc, subparallel in their median 
third, slightly narrowed in front and abruptly narrowed behind, emarginate at the base, with a sharp 
lateral carina, which bifurcates a little below the shoulder, and extends to within a short distance of the 
apex, and two shorter, parallel carine on the disc—the inner carina faint, the others surmounted by a 
series of tubercular elevations, each of which bears an erect bristly hair,—the interspaces with scattered 
rather coarse punctures and small conical elevations, the former bearing decumbent hairs and the latter 
erect bristles, the humeri thickened and reflexed, but obtuse; the entire under surface very coarsely, 
thickly punctate, each puncture bearing a decumbent bristly hair; prosternum declivous behind; legs 
very roughly punctured ; anterior tibiee with a very long curved spine at the apex, denticulate on their 
outer edge. 
Length 123-16, breadth 63-83 millim. 
Hab. Mexico, Nuevo Laredo in Tamaulipas (/ége). 
Five specimens, from just within our northern boundary. . This insect is very distinct 
from any other Mexican species of the genus known to me; it comes nearest to 
A. villosa*. A. puncticollis, Lec. (nec Sol.), is an allied form, but it has not costate 
elytra. 
* Specimens of A. horrida, A. feda, A. obliterata, A. moricoides, and A. geminata have been examined by 
Dr. Horn, who informs me that they are all unknown to him. 
