260 RHYNCHOPHORA. 
club not very large, oblique oval, the superior and apical margins rounded in a common curve, the 
inferior margin sinuate, the sutures curved, fringe short and inconspicuous, inner surface (except for 
a streak on the apical joint) sensitive. Prothorax broader than long, almost parallel-sided behind, 
broadly rounded in front, the anterior opening slightly sinuate, apex bituberculate in the male, the basal 
margin scarcely sinuate ; surface with a postmedian transverse subelevated line, anteriorly with very 
long transverse imbricate wrinkles, shorter in the male, arranged almost in concentric lines, posteriorly 
finely reticulate and slightly dull. Elytra similar in shape to those of C. ptyocerus, but with 
the sides gradually flexed into the more rounded apex; surface finely punctured in rows, the interstices 
with an occasional setiferous puncture; declivity very slightly flattened from side to side, sometimes 
with one or two shallow strix along the suture, and with scattered sete arising from scarcely perceptible 
tubercles. 
Hab. GuaTeMaLa, Zapote, Volcan de Atitlan (Champion); Panama, Bugaba, Volcan 
de Chiriqui (Champion). 
Mr. Champion took seven examples of this species on the Volcan de Chiriqui and 
one at Bugaba, all females; and three males in Guatemala. . 
As males and females have never been found in the same locality, the fact of their 
being sexes of the same species is not proved, but it cannot be doubted when the 
specimens are examined side by side. 
The specimens vary in the distinctness of the strie found on the declivity, which are 
obsolete in some examples, and best marked in those from Zapote. 
The female is separable from C. comatus, 2, by the absence of the thick hairs on the 
inner face of the antennal club, and of the dense frontal pubescence, 
7. Corthylus rubricollis, sp. n. (Tab. VIII. fig. 9, 2, antenna. ) 
Oblongus, nitidus, rufo-ferrugineus, scutello nigro-marginato ; elytris nigris, subtiliter sine ordine punctatis, 
declivitate subglabra, vix impressa, sutura subelevata. 
Long. 2°7-3°1 millim. 
Mas. Fronte subconvexa, prothoracis apice bituberculato. 
fem. Fronte concava, pube tenui flava vestita ; antennarum clava subreniformi. 
Oblong, ferruginous-red, the elytra black. Forehead ( ¢) subconvex, dull, punctured, the mouth fringed, the 
mandibles black; antennal scape blackish, the club ferruginous, rather broad, with straight sutures. 
Forehead ( Q ) impressed, not deeply, covered with fine erect yellow hairs ; antenne pitchy-red, the scape 
moderately widened, the club not very large, obliquely subreniform, with bisinuate inferior border, 
apparently three-jointed, shortly pubescent, and with a few cirri springing from the upper border of the 
inner face and not longer than the club; inner face reticulate, with no porous patch. Prothorax as long 
as broad, truncate and finely margined at the base, the sides slightly converging behind, regularly rounded 
forwards from behind the middle, anterior margin bituberculate in the male; surface with an indistinct 
postmedian elevated transverse line, in front with not very transverse asperities, behind smooth and 
rather dull. Scutellum triangular, rufous, with black side-margins. Elytra at base a little narrower 
than the prothorax and less than one-half longer, slightly curved at the sides and gradually rounded behind 
to the obtuse apical border; surface shining, with fine irregular punctuation ; declivity convex, less 
shining, scarcely impressed, and with two rows of punctures on each side of the suture. Underside behind 
the prothorax somewhat infuscate. 
Hab. Panama, Volcan de Chiriqui (Champion). 
Five examples. This species, easily distinguished from most others by its colour, 
