XYLOPHILUS. 185 
and much longer than 10, ovate, acuminate; prothorax about as long as broad, convex, narrower than 
the head, the sides rounded and converging in front, almost straight behind, the surface punctured like 
that of the head; elytra short and broad, widest about the middle, a little rounded at the sides, feebly 
transversely depressed below the base, closely and finely punctured; beneath black, densely pubescent ; 
legs very slender, moderately long, piceous-brown, the extreme base of the four hinder tibie, the anterior 
tibie entirely, and the tarsi testaceous, the hind femora slender and only a little stouter than the 
others. 
Length 13 millim. 
Hab. Panama, Los Remedios (Champion). 
One example, of uncertain sex. X. corticarioides has somewhat the facies of a small 
Corticaria; it is about the same size as X. sericeus, but has the head and antenne very 
differently formed, the legs much more slender, and the elytra broader behind, the 
general shape being obovate. 
29. Xylophilus sericeus. (Tab. VIII. figg. 21,¢; 21a, hind leg.) 
Short and broad, rather convex, piceous-brown, opaque, uniformly clothed with exceedingly fine, sericeous, 
ashy, pruinose pubescence. Head large and broad, densely and minutely punctured ; eyes (¢) black, 
pubescent, very large, occupying the whole of the side of the head (the head not at all extended behind 
them), narrowly separated, coarsely granulated, deeply emarginate; antenne ( 3) very pubescent, long 
and slender, filiform, extending to beyond the middle of the elytra, testaceous, joint 2 exceedingly short, 
globose, not half the length of 3, 3 a little longer than 4, 4 shorter than 5, 5-10 elongate, becoming a 
little shorter outwardly, 11 about twice as long as, and stouter than, 10, ovate, acuminate ; prothorax 
convex, much narrower than the head, as long as broad, narrowing a little in front, the disc very finely 
and obsoletely canaliculate, and with an oblique groove on either side, the grooves confluent just before 
the base and together forming a U-shaped depression, the surface densely and exceedingly minutely 
punctured (the punctuation only visible under a powerful lens); elytra rather short, comparatively convex, 
very much broader than the prothorax, subparallel in their basal half, the surface densely and finely 
punctured (the punctuation coarser than that of the prothorax), and without sutural or posthumeral 
depression ; beneath coloured as above; legs slender and moderately long, testaceous ; the hind femora 
(3) very little stouter than the others and deeply grooved on the inner edge, the part of the femur on 
either side of this a little extended and densely fringed with short fulvous hairs; all the tibie moderately 
curved. 
Length 14 millim. (¢.) 
Hab. Panama, Bugaba (Champion). 
One male example. This minute species possesses a different facies from most of 
the other Central-American members of the genus ; the upper surface is piceous-brown, 
and uniformly clothed with exceedingly fine, silky, pruinose pubescence; the punctua- 
tion of the head and thorax is very minute, and that of the elytra very fine; the 
antenne are very pubescent, long and slender, with the second joint exceedingly short 
and the apical joint longer and stouter than the tenth; the hind. femora (in the 
male) are grooved on the inner edge and ciliate. In this last-mentioned character 
X. sericeus approaches X. fragilis and X. unifasciatus. 
30. Xylophilus femoralis, (Tab. VIII. figg. 22, ¢; 22a, hind leg; 224, 
antenna.) 
Oblong ovate, rather narrow, black, densely clothed with short, silky, appressed brownish pubescence, the 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 2, August 1890. 2BB 
