96 HETEROMERA. 
formed as in that species, but duller and more convex; the thorax narrower, more 
rounded at the sides, and not widened anteriorly; the elytra more narrowed towards 
the base and more finely punctate-striate ; the head coarsely punctured between the eyes. 
7. Argoporis costipennis. 
Cerenopus costipennis, Lec. Ann. Lyc. New York, v. p. 143°. 
Argoporis sulcipennis, Horn, Rev. Ten. N. A. p. 825°. 
Hab. Nort America, Oregon, California, and Arizona ?, river Gila *. 
Found on our northern boundary. 
AMMOPHORUS. 
Ammophorus, Guérin-Ménéville, Voyage Coquille, Ent. ii. p. 94 (1830); Lacord. Gen. Col. v. 
pp. 132, 725. 
Selenomma, Solier in Dej. Cat. 2nd edit. p. 183. 
This is a genus containing some few species found in Peru, Chili, and the Galapagos 
Islands; one species is recorded from Panama, and another from the Sandwich Islands. 
It is probable, however, that there is some mistake about these last-named localities. 
1. Ammophorus denticollis. 
Ammophorus denticollis, Bohem. Res. Eugén. Ins. p. 89°. 
Hab. * Panama 4, 
Group EUTELIDES. 
This group will contain Diceroderes, a genus peculiar to Mexico and Guatemala ; 
some not very closely allied forms are found in South Africa. 
DICERODERES. 
Diceroderes, Solier, Ann. Soc. Ent. Fr. x. p. 46 (1841) ; Lacord. Gen. Col. v. p. 356. 
Prosomenes, De}. Cat. 3rd edit. p. 216. 
A single species only is known of this genus; D. elongatus, Redt., from Java belongs 
to the group Boletophagides. 
1. Diceroderes mexicanus. 
Diceroderes mexicanus, Sol. loc. cit. p. 49, t. 2. f. 16-21; Lac. loc. cit. p. 357. 
Hab. Mexico (coll. F. Bates), Orizaba (Sallé), Jalapa (Hége); GuaTemata, San 
Gerénimo (Champion). 
This remarkable species may be known at once by the rough upper surface, and the 
thorax produced into a stout curved horn on each side in front ; it is found under loose 
bark. 
