CORTHYLUS. 251 
Venezuela and now in the Vienna Museum. It is not pleasant to apply terms of 
condemnation to the work of another writer; but that of Ferrari, pretentious as it is, 
is a mine of errors of judgment and observation. Though it was almost neglected by 
Eichhoff, who clearly never saw the types, it contains too many generic and specific 
descriptions to be wholly disregarded. 
By the courtesy of Herr Ganglbauer, I have examined Ferrari’s types, and, so far 
as the scope of the following pages admits, I have attempted to assign his genera 
and species to their proper positions. None of the former, other than Brachyspartus, 
is adopted; but Cosmocorynus, here regarded as a subgenus of Péterocyclon, will 
probably be accepted as a distinct genus on the examination of more abundant 
material. 
For reasons before specified, a table of the genera is difficult to construct, and in 
cases of doubt the fuller generic diagnoses should be consulted. 
Elytra not explanate or produced at apex, at most emarginate or divaricate 
at the extremity of the suture; prothorax anteriorly gradually convex 
and declivous. 
Antennal club acuminate or elongate. 
Club acuminate or cheliform ; funiculus 1- or 2-jointed . . . . . . Brachyspartus. 
Club elongate; funiculus 8-jomted . . 2 6. ee ee ee ee 6 Glochinocerus. 
Antennal club variously constructed, but neither acuminate nor elongate. 
Apical border of elytra entire ; funiculus 1-jointed. 
Anterior tibiz not serrate throughout; tarsi not elongate . . . . . Corthylus. 
Anterior tibiz closely serrate throughout; tarsi long and slender. . . Metacorthylus. 
Apical border of elytra emarginate or divaricate at the extremity of the 
suture. 
Funiculus 2-jointed ; prothorax cylindrical behind the middle. . . . Pterocyclon. 
Funiculus 3-jointed ; prothorax curved from base to apex . . . . - Tricolus. 
Elytra explanate or produced at apex; prothorax (except in 4. collaris) 
strongly declivous at apex, covering the head, or produced forwards ; 
funiculus 8- (rarely 2-) jointed; form elongate . . . . . . + + + Amphicranus. 
CORTHYLUS. 
Corthylus, Erichson, Wiegm. Arch. ii. 1, p. 64 (pars) '; Eichhoff, Berl. ent. Zeitschr. 1868, 
p- 2797; 1869, p. 297°; Rat. Tom. p. 421*; Leconte, Rhynch. N. Am, p. 347 - 
Corthylus, subgen. Pseudocorthylus, Ferrari, Borkenk. p. 59°. 
Morizus, Ferrari, Borkenk. p. 69’. 
Crypturgus, Zimmermann, Trans. Am. Ent. Soc. 1868, p. 142°. 
Cryphalus (group A, subgroup 2), Leconte, Trans. Am, Ent. Soc. 1868, p. 154°, 
This genus was founded by Erichson! in 1836 for two species, Bostrichus 
compressicornis, Fabr., and JB. fasciatus, Say, the latter of which has since been 
removed to Pterocyclon. Much uncertainty formerly existed as to the limits of this 
2KK2 
