HETEROMERA. 491 
Hab. Nortn America, Arizona 1.—Mexico, Northern Sonora (Morrison), Villa Lerdo 
in Durango ( Hége). 
2. Arzoschizus simplex. 3 
Areoschizus simplex, Casey, Ann. N. York Acad. v. p. 369 (Nov. 1890)’; Horn, Trans. Am. Ent. 
Soc. xvii. p. 341°. 
Hab. North America, Arizona!, El Paso1, Texas ?.—Merxico, Paso del Norte 
(Hoge). 
3. Arzoschizus mexicanus. (Tab. XXII. fig. 3.) 
Obscure castaneous, subopaque. Head considerably longer than broad, dilated in front, parallel at the sides 
for a short distance behind the eyes, and then gradually, arcuately narrowed to the base, obliquely 
grooved on either side behind the eyes (the intraocular space appearing longitudinally convex), the intra- 
ocular carina short and not extending beyond the eyes, the surface densely, coarsely punctate, and 
sparsely. clothed with coarse scale-like hairs; antenne very stout, clothed with very coarse scaly hairs ; 
prothorax very much narrower than the head, similarly punctured, slightly longer than broad, the sides 
a little rounded anteriorly and obliquely converging behind, very feebly sinuate towards the base, the disc 
with a broad median groove limited on either side by a row of short, coarse, scaly, yellowish hairs, the 
base, apex, and sides coarsely fimbriate ; elytra subparallel from a little below the base to beyond the 
middle, broadly, obliquely rounded at the shoulders, obliquely narrowed behind, quadricostate, the inter- 
stices each with a double row of very coarse impressions, the costs each with a row of short, coarse, 
semi-erect, scaly, clavate hairs at their summit; flanks of the prothorax very coarsely, thickly punctate ; 
legs sparsely clothed with coarse scales; femora unarmed. 
Length 4 millim. 
Hab. Muxico, Tepetlapa (/ohr). 
One specimen. Closely allied to A. sulcicollis, Horn, and A. jimbriatus, Casey. It 
differs from the former (numerous examples of which are before me) by the shorter 
thorax, the sides of which are very feebly sinuate and coarsely fimbriate, the grooved, 
more parallel head, and very stout antenne ; and from the latter by the longer head, 
narrower thorax, shorter elytral hairs, &c. 
ASIDA (p. 52). 
Of this genus we have received a very large amount of additional material, chiefly 
from Northern Mexico; and numerous additional species have to be added to the 
Mexican list. Zisamenes, Ucalegon, Poliorcetes, and Zamolxis*, each containing a 
single species, are connected with Asida by intermediate forms, and they can only be 
treated as sections of that polymorphous genus. If they are retained as distinct, 
A. elata, A. ingens, &c. would also have to be separated. Ologlyptus has the middle 
coxal cavities partly closed externally and the trochantin small; it is also connected 
with Asida by intermediate forms. 
* Preoccupied in Hemiptera. If retained as distinct, the name Zaleucus can be substituted for it. 
