282 RHYNCHOPHORA. 
not reaching the posterior margin of the eyes, joint 2 of the funiculus slightly longer than 1. Prothorax 
a little longer than broad, cylindrical, constricted in front, densely, finely punctate; transversely 
furrowed and confluently foveolate, the disc with two longitudinally placed small, oblong, polished fovew. 
Scutellum small, transverse. Elytra broader than the prothorax, widened to the middle, acuminate 
at the apex, and strongly transversely depressed at the base; with rows of fine punctures placed upon 
extremely fine striz, the outer strie distinctly separate throughout, the interstices uneven, densely, finely 
punctate, 3, 5, and 7 broadly, and 6 more narrowly, costate. 
Length 164, breadth 54 millim. ( 9.) 
Hab. Mexico, Colonia (Lohr). 
One example, slightly worn. ‘This insect has the prothorax formed as in WM. gemi- 
natus, and the elytra sculptured and lineate somewhat as in Jf. bifoveatus. ‘The actual 
position of the locality is not indicated on the printed label. 
Group PLATYOMINA. 
Cyphina, Horn (part-). 
Cyphides (part.) and Eustylides, Lacordaire. 
Under this heading are placed various genera with the scrobes superior (in great 
part or wholly exposed from above), short (or if continued backwards becoming 
shallow and squamose behind), parallel or divergent; the eyes not strictly lateral ; 
the elytra 10-striate, the outer striz# coalescent from about the basal third or free ; 
the anterior tibie unguiculate or unarmed; the posterior tibia laminate at the apex 
(corbels closed); the tarsal claws free (except in Aphrastus) ; the wings fully developed 
(except in a few species of Hustylus) ; and the body densely squamose. 
The following genera belong here:—Platyomus, Compsus, Artipus, Brachystylus, 
Brachyomus, Eustylus, Synthlibonotus, and Aphrastus, Schonherr, Pseudocyphus, 
Schaeffer, Zemnoscapus, Chevrolat, &c. Aphrastus agrees with Phyllobius in having 
the tarsal claws connate and the scrobes superior; but in the last-named genus the 
scrobes are open behind, foveiform, and subapical, and the corbels are open. 
Pseudocyphus has the rostrum less widened anteriorly than in the allied forms 
({ Platyomus, &c.) and the scrobes sublateral; this genus would therefore seem to be 
better placed amongst the Cyphina, from which it differs, however, in having the eyes not 
strictly lateral. Hustylus and Brachystylus (with Aptolemus) were placed by Lacordaire 
in a separate Group, “‘ Eustylides,” near his “ Phyllobiides.” The six genera represented 
in our region may be separated thus :— 
a, Tarsal claws free. 
a’. Rostrum not widened anteriorly, the upper portion narrowed and deeply 
excavate towards the apex, the nasal plate squamose ; outer elytral striz 
free ; anterior tibiz unarmed at the apex* . . . 2. . ). . . . ~~. )»©Psrupocypnus. 
* Platyomus belongs to this section. 
