HETEROMERA. 503 
38. Asida ingens. (Tab. XXII. fig. 20.) 
Very broad and robust, moderately elongate, black, the head and prothorax opaque, very sparsely pubescent, 
the elytra slightly shining, glabrous. Head deflexed, rugosely punctured ; eyes small, transversely oval, 
not extending beneath the head ; prothorax transversely convex, much broader than long, only a little 
wider at the base than at the apex, widest before the middle, greatly dilated at the sides, the latter 
strongly rounded anteriorly, obliquely converging behind, and abruptly narrowed in front, the margins 
crenate and raised, the apex moderately emarginate, the base truncate, the anterior angles distinct but 
obtuse, the hind angles obtuse, the entire surface very rugosely punctured; elytra narrower than the 
prothorax at the base, rapidly widening to beyond the middle, abruptly narrowed and abruptly declivous 
behind, truncate at the base, and produced at the apex, with an undulating marginal carina extending 
from the outwardly-directed dentiform humeri to about one-fourth from the apex, and two coarse very 
sinuous carine on the disc, the interspaces with very coarse, transverse, irregular elevations, those along 
the suture more regularly arranged, the flanks with numerous granular elevations; beneath coarsely, 
shallowly, rather closely punctate ; prosternum very broad, declivous behind; legs very stout ; anterior 
tibize with a moderately long tooth at the outer apical angle. 
Length 253-264, breadth 143-15 millim. 
Hab. Mexico, San Isidro in Coahuila (ége). 
Two specimens of this very large species have been obtained. The elytral sculpture 
resembles that of A. sordida. The thorax is very strongly, arcuately dilated anteriorly 
and obliquely narrowed behind; the elytra are narrowed and truncate at the base, 
the humeri dentiform and outwardly directed. In its small, transversely-oval eyes, 
deflexed head, stout limbs, &c., A. ingens approaches A. (Tisamenes) truquii. 
MICROSCHATIA (p. 66). 
Microschatia punctata (p. 66). 
Var. The elytra each with three irregular raised lines or coste, the punctuation much coarser and partly 
confluent ; the sides and apex of the abdomen sparsely, coarsely punctate. 
Hab. Mexico, Zimapan in Hidalgo (Hoge). 
Sent in abundance by Herr Hége. MUM. punctata has been recorded by Dr. Horn 
(Rev. Ten. of Am. north of Mexico, p. 282) as from Lower California, but it is not 
improbable that his insect belongs to another species; neither in the typical form nor 
in the above-described variety can the thorax be described as “smooth,” the disc 
being always very coarsely, sparsely punctate. 
ASTROTUS (p. 66). 
1(a). Astrotus regularis. 
Astrotus regularis, Horn, Rev. Ten. of Am. north of Mexico, p. 290°. 
Hab. Norra America, Texas 1.—Muxico, Nuevo Laredo in Tamaulipas (Hoge). 
Six specimens, agreeing perfectly with others from Texas in Mr. F. Bates’s 
collection. 
3 TT 2 
wa 
