CORTHYLUS. 255 
C. excisus (Ferr.), described from a single male specimen, may also be conjecturally 
referred to this section. It is sufficiently defined and recognizable by Ferrari's 
description. 
In C. comatus the club appears to be triarticulate, is less transverse, and is pilose 
on the inner face, the hairs not being aggregated into a marginal flagellum. This 
species forms a link with those of Division IL. 
1. Corthylus compressicornis, (Tab. VIII. figg. 1, 2; la, antenna, @.) 
Bostrichus compressicornis, Fabr. Syst. El. 11. p. 388°. 
Corthylus compressicornis, Er. Wiegm. Arch. ii. 1, p. 64 (sine descr.) *; Eichh. Rat. Tom. p. 422°. 
Hab. Panama, Bugaba (Champion).—Souta America !. 
Mr. Champion took three females at Bugaba, which have been compared both with 
the Fabrician type of the genus and species, now in the Berlin Museum, and the 
example in Chapuis’s collection, fully described by Eichhoff. It is the only Corthylus in 
which the elytra have the apex retuse and bordered with a complete circular margin, 
as in several species of Xyleborus. The inner face of the antenna, beyond the second 
suture, is covered with a sensitive patch *. The male is unknown. 
2. Corthylus flagellifer, sp. n. (Tab. VIII. figg. 2, ¢; 2a, antenna, ¢; 
3, antenna, @ .) 
Oblongus, subglaber, sat nitidus, niger, prothoracis apice et elytris nonnumquam piceis, antennis et pedibus 
ferrugineis ; prothorace postice subopaco; elytris subtilissime lineato-punctatis, apice fortiter deflexo, 
punctato, utrinque impresso, glabro, marginibus suturalibus elevatis. 
Long., § 2°2-2°4 millim., 2 2°3-2°9 millim. 
Mas. Fronte subconvexa, glabra, antennarum clava ovali, prothoracis apice bituberculato. 
Fem. Fronte concava, ad verticem pilis flavis dense fimbriata, antennarum clava subsecuriformi, marginibus 
rotundatis, flagello longissimo ornato. 
Oblong, glabrous, rather shining. Front (¢) subconvex, reticulate, punctured, glabrous, except for a thin 
oral fringe ; antenn ferruginous, the club obovate, its sutures a little curved, the inner face slightly 
concave ; front ( 2+) concave, thinly hairy below, the sides above and vertex with a close fringe of curled 
shining yellow hairs, parted in the middle. Antenne ferruginous, the scape triangular, flattened, truncate, 
fringed, the club broad, subsecuriform, the superior and apical margins conjointly rounded, the inferior 
margin nearly straight, the inferior apical angle rounded but evident; the superior margin with a 
flagellum of hairs curled inwards and more than twice the length of the club. Prothorax as broad as 
long, subcircularly rounded in front, the apex rather more prominent and bituberculate in the male, the 
sides parallel behind the middle, the base subtruncate and finely margined; disc with a transverse 
median elevated line, black, usually with the apex rufescent, its anterior third asperate, the asperities 
not strongly transverse, the remainder rather dull, with indistinct scattered punctures. Scutellum 
rounded triangular, shining black or piceous. Elytra as wide as the prothorax and rather less than one- 
half longer, the sides subparallel, not narrowed posteriorly, strongiy inflexed apically, with rounded 
* Tn the Plate the inner face of the antenna is represented in each case, and the sutures are indicated only 
so far as they can be made out in the specimen figured. The representation of these antenne has been 
attended with difficulty, and some amount of foreshortening may exist in certaio figures, although this has 
been overcome as far as possible. 
