PTEROCYCLON. oe 275 
teeth small and numerous. It is, perhaps, the male of one of the three following 
species, but the locality is different, and does not admit of its being associated with 
any of them. 
6. Pterocyclon umbrinum, sp. n. 
Fem. Oblonga, cylindrica, vix nitida, capite et prothorace nigro-piceis, elytris piceis posterius infuscatis, 
antennis pedibusque fusco-testaceis, earum clava late ovata, fimbriata; prothorace medio transverse 
subelevato, posterius obsolete punctato ; elytris postice angustatis, ad apicem singulatim rotundatis, medio 
haud profunde marginatis, supra subtilissime reticulatis et confuse punctatis, declivitate obliqua, ad 
suturam impressa, punctata, ad latera callose elevata, immarginata, callo singulo bituberculato, sparsim 
setoso, suturee marginibus elevatis, subtiliter tuberculatis. 
Long, 3:2 millim. 
Female. Oblong, cylindrical, somewhat robust, scarcely shining. Head pitchy-black, subconvex in front, 
shining glabrous, strongly and closely punctured near the mouth and sides, the punctures weaker towards 
the median impunctate line; epistoma dull, transversely subimpressed; mouth scarcely fringed; eyes 
narrow, deeply emarginate ; antenne testaceous-brown, the club broad oval, subtruncate at the tip, with 
a fringe of long sets arising from the inner face and upper border of the basal joint, its sutures curved. 
Prothorax rather longer than broad, circularly rounded in part to before the middle, thence parallel-sided 
to the slightly bisinuate base, the hind angles obliquely rounded; surface piceous-black, with a median 
transverse subelevated line, obliquely declivous, in front asperate and very sparingly pubescent, its hinder 
half rather dull, very obsoletely punctate. Scutellum small, transverse, rounded triangular, black. 
Elytra narrower at base than the prothorax, and rather less than one-half longer, their basal borders 
slightly rounded, the shoulders obtuse, the sides parallel to the middle, thence narrowed in an oblique 
curve, the apices strongly rounded (when seen from behind), with a rather shallow median emargination ; 
surface subcylindric, but slightly shining, pitchy-brown, lighter towards the base, with fine close 
reticulation, minutely punctured in the interspaces, without distinct rows ; declivity convex longitudinally, 
impressed along the suture, rather widely below, the impression prolonged vaguely above, distinctly and 
closely punctured, the sutural margins subelevated and finely tuberculate, sides not margined but callose, 
the callosities rather wide, bearing each two small tubercular teeth, of which the upper tooth is situate 
near the suture, and a few sete on their outer part. Underside fuscous. Legs testaceous-brown ; 
marginal serration of the anterior tibie fine and very close. 
Hab. Guarema.a, Purula in Vera Paz (Champion). 
One specimen. ‘The difference in the tibial structure justifies the separation of this 
form from P. hoegei, at least for the present. 
7. Pterocyclon consimile, sp. n. 
Fem. P. umbrino 2 colore, statura approximata, sed robustior ; fronte rufescente, minus nitida, subtiliter 
subeequaliter punctata, elytris ad latera per totum subrotundatis, yix perspicue sculpturatis, utrinque 
juxta suture basim impressis, declivitate minus obliqua, minus impressa, vix punctata, suture marginibus 
haud tuberculatis, cautissime distinguenda. 
Long. 3°1 millim. 
Female. Closely allied to P. umbrinum, but rather more robust. Head rufescent in front, rather dull, with 
fine uniform punctuation, median line not shining, slightly elevated ; antennal club triangular, with the 
apex nearly truncate, its lower angle not rounded, fringe thin, arising from the basal joint only. 
Prothorax a little more obtuse, rather broader, its disc not quite so black, with the transverse line 
less distinct and farther from the apex. Elytra with the sides distinctly though slightly rounded from 
the base, their apices less strongly rounded, appearing subtruncat~ from above; surface with similar 
QNN 2 
