278 RHYNCHOPHORA. 
11. Pterocyclon glabrifrons, sp. n. 
Cylindricum, subnitidum, fusco-piceum, elytrorum basali dimidia parte plus minusve testacea; antennis et 
pedibus testaceis; fronte punctata, glabra; prothoracis apice obtuse rotundato, dorso medio indistincte 
elevato, postice subopaco obsolete punctato; elytris posterius angustatis, ad apicem singulatim rotundatis, 
medio emarginatis, distincte subconfuse punctatis, in declivitate ad suturam impressis, utrinque callosis et 
bituberculatis. 
Long. 2°6-2°8 millim. 
Mas. Fronte supra os opaca, haud impressa; clava antennali ovali, breviter pilosa. 
Fem, Fronte equaliter subopaca, supra os subimpressa; clava antennali latiore, pilorum fasciculo 
ornata. 
Cylindrical, moderately elongate, not very shining. Head piceous-black, the front feebly convex, subopaque, 
glabrous, punctured ; in the male more opaque over the mouth, not impressed, the median line obsolete ; 
in the female not more opaque over the mouth but subimpressed on either side and with a short, 
longitudinal, subelevated, smooth line towards the vertex, oral fringe almost wanting ; antenne testaceous, 
the club oval, with nearly straight sutures, in the male shortly pilose, in the female slightly wider and 
furnished with a scanty fasciculus of hairs on the superior border, about half as long again as the club. 
Prothorax about one-fourth longer than broad, the sides subparallel from the base to before the middle, 
then slightly narrowed, the apex rounded in an obtuse curve, hind angles rounded, the base subsinuate ; 
disc gently declivous in front with traces of a median transverse elevation, piceous, with the apex some- 
times lighter, glabrous, the apical half asperate in front, the asperities obsolete before the middle, the 
basal half dull, finely shagreened and obsoletely punctured, subimpressed before the hind angles. 
Scutellum rounded-triangular, black. LElytra scarcely as wide as the prothorax, and about one-third 
longer, the basal margins suboblique, the shoulders obtusely rounded, the sides subparallel, the hinder 
third thence slightly narrowed to the apex ; apical margins separately rounded and hence emarginate at the 
suture ; surface lighter or darker fusco-piceous, blackish, the basal half (except the side-margins) more or 
less testaceous; surface cylindrico-convex, declivous from the hinder third, not very shining, finely 
reticulate, with close irregular punctuation here and there in rows; declivity rather widely but not 
deeply impressed along the suture, laterally subcallose and bituberculate on each side. Underside piceous ; 
legs testaceous. 
Hab. GuateMaLa, Quiché Mountains (Champion). 
Two pairs. This species is allied to and may possibly be identical with P. levigatum, 
Eichh., from Brazil, of which no specimen has been procurable for comparison. The 
points in which the description of the latter species does not tally chiefly concern the 
sexual characters: P. levigatum exhibits differences in the structure of the elytral 
declivity in the two sexes, and is described as having the apical margin of the 
prothorax crenulate in one sex ; neither of these features is observable in P. glabrifrons. 
12. Pterocyclon punctifrons, sp. n. 
Fem. Oblonga, subnitida, subglabra, fusco-testacea, elytris ad basim dilutioribus; P. glabrifronti Q affinis, 
differt fronte nitida, lateraliter fortiter punctata, supra os profunde impressa et medio carinata, elytris 
postice minus angustatis, levioribus, indistinctius punctatis. 
Long. 2°7 millim. 
Female. Oblong, cylindrical, rather dull, dirty testaceous-brown (the type perhaps immature), the elytra lighter 
towards the base. Head piceous, the front subconvex, very shining, glabrous, strongly and deeply 
punctured at the sides, impunctate in the middle, deeply impressed over the mouth, the impression 
interrupted in the middle by a short vertical carina; mandibles with a small lobe at the tip, separated 
by two notches from the outer and inner borders respectively; antenne as in P. glabrifrons 2. 
Prothorax circularly rounded in front, its disc scarcely so convex as in that species and with no distinct 
