bo 
(ona | 
CO 
CORTHYLUS. 
Corthylus redtenbacheri. 
Mas. Pseudocorthylus redtenbacheri, Ferr. Borkenk. p. 60 (nec var.) *. 
Fem. Pseudocorthylus castaneus, Ferr. Borkenk. p. 59, 3 (lege 2 ) nec 2”. 
Similar in colour to C. castaneus, but smaller, with the elytra less elongate, more narrowed behind, and 
gradually incurved to the more rounded apical margin, the declivity more convex, not impressed on each 
side of the suture nor tuberculate. Head (¢) concealed in the type, the antennal club oval, with 
transverse sutures; head (@) with a circular frontal impression, margined with a ring of stout, erect, 
curved hairs and more thinly pubescent in the middle, antennal club very transverse, trigonate, its apical 
border sinuate, with a thin flagellum of recurved hairs rather longer than the width of the club, the 
sutures sinuately curved. Prothorax transverse, subcircularly rounded in front, parallel-sided behind, 
transverse and finely bordered at base, apex ( ¢) bituberculate ; surface convex, the transverse elevated 
line fine, moderately shining behind the middle and very feebly punctured. Elytra one-third longer 
than the prothorax, more finely punctured than in C. castaneus, with the apex different in structure ; 
declivity just perceptibly flattened on each side, with two rows of punctures. 
Long. 2°7 millim. 
Hab. Vunuzunta!? (Mus. Vind. Ces.). 
I have little hesitation in associating together as sexes the above forms. In the type 
of the female the flagellum is curved so as to touch the inner angle of the club; 
Ferrari has consequently described the club as being furnished with a semi-lunar 
fenestra in the last joint! 
Corthylus letzneri (Pseudocorthylus letzneri, Ferr.), represented by three male examples 
in the collection of the Vienna Museum, is very like the above species, but is blackish- 
piceous, with the apex of the prothorax not tuberculate, the elytral punctures tending 
to form rows, the apex more obtuse, the declivity slightly impressed on each side and 
with only a single row of weak punctures close to the suture. | 
Division II. 
Antennal club in the female smaller, not transverse, apparently triarticulate, at most with a few longer hairs 
on the upper limb of the inner face (C. panamensis and C. rubricollis). 
To this division belong C. punctatissimus (Zimm.) and C. columbianus, Hopk., 
which do not occur in our region. 
6. Corthylus panamensis, sp. n. (Tab. VIII. fig. 8, 2, antenna.) 
Oblongo-ovalis, nigro-piceus, antennis pedibusque ferrugineis ; prothorace semielliptico, antice rugulis elongatis 
in lineas concentricas ordinatis ornato, postice subopaco ; elytris nitidis, tenuiter lineato-punctatis, apice 
convexe declivi, sparse piloso, vix distincte tuberculato, stria suturali impressa. 
Long. 3 millim. 
Mas. Fronte subconvexa, punctata; prothoracis apice bituberculato. 
Fem. Fronte impressa, punctata, pube brevi vestita, linea media levi; antennarum clava majore, marginibus 
superiore et apicali conjunctim rotundatis. 
Oblong-oval, piceous or piceous-black, the antenne and legs ferruginous. Head ( ¢) subconvex, rufescent 
above, somewhat dull, punctured ; eyes rather small; antennal club oval, with nearly straight sutures. 
Head (2) impressed in front, punctured and covered with short erect pubescence, the median line 
shining, sometimes subelevated ; eyes larger; antennal scape rather short, flattened, and dilated; the 
2LL2 
