PREPODELLUS.—CYPHINA. 221 
Found in numbers at Pefia Blanca, these specimens (somewhat immature) having the 
antenne ferruginous, the club excepted. Very like P. nigriclava, Kirsch (the type of 
which, as well as that of P. ruficornis, has been communicated by Dr. Heller for 
comparison), but with the antenne inserted a little nearer the tip of the rostrum, 
the scrobes more sinuate and partly visible from above, the elytral setze much shorter. 
P. ruficornis has a longer rostrum, the prothorax rounded at the sides, and the elytra 
maculate. 
Group CYPHINA. 
Under this group are placed the various genera with a broad, subquadrate or 
oblong-subquadrate, flattened, narrowly sulcate rostrum; the scrobes lateral, sinuate, 
and descending; the eyes convex and strictly lateral (thus being always separated above 
by the full width of the rostrum); the scutellum minute or depressed; the humeri 
prominent; the tarsal claws free; and the body winged. The eyes are often so 
prominent that they might almost be described as subpedunculate. ‘The rostral 
groove terminates at the base of the subapical plate (never extending across it, as in 
Artipus, &c.), and the apical emargination is sometimes so deep that no definite bare 
nasal plate is visible. ‘The outer strie of the elytra are coalescent or approximate 
posteriorly in Cyphus, &c., and free in other genera, and the posterior tibiz may have 
open or closed corbels, according to the development of the apical portion of the tibia. 
The Cyphina, as defined above, include Cyphus, Germar, Hadropus, Mimographus, 
Naupactus (the winged forms only), Plectrophorus, Apotomoderes, and Megalostylus, 
Schonherr, Hoplopactus, Chevrolat (= Diaphorus, Faust), various new genera described 
below, &c.; it is therefore not based on the characters used by Lacordaire or 
Horn*. Pseudocyphus and Compsus approach Cyphus, but neither of these genera 
has the eyes strictly lateral. 
The Central-American genera of Cyphina may be tabulated thus :— 
a. Antennal scape gradually or moderately clavate at the apex. 
a’. Legs (the femora excepted) slender. 
a’. Prothorax narrowly margined and feebly sinuate or truncate at the 
base, short, subcylindrical, sometimes conical in 9. 
a’, Antenne long and slender, joint 2 of the funiculus much longer 
than 1 (shorter in S. cinereoguitatus) ; elytra without long erect 
bristly hairs. 
a‘, Humeri less prominent; outer strie free. . . . . . . . SVEIFRARRHINUS. 
6*. Humeri more prominent; outer strie coalescent . . . . . MuimoGrapnopsis. | 
b°. Antenne shorter and stouter, joint 2 of the funiculus not much 
longer than 1; elytrasetose . . . . . . . . . . . . Mimocrapuus. 
* Cyphopsis, Roelofs, from Brazil, must be related to Ewophthalmus. 
