XYLOPHILUS. 187 
the pubescence (except on the elytral spots) is so dense as to completely hide the punc- 
tuation ; the antenne are slender and subfiliform, with the second joint short and the 
apical joint a little stouter and longer than the tenth; the legs are long and quite 
slender, the hind femora neither dilated nor grooved and the front tibie not hooked 
at the tip (in the male). The large lateral mark on the elytra is very sharply defined. 
Narrower and more elongate than X. singularis, the antenne much shorter and more 
filiform, the head somewhat similarly shaped. 
Apparently allied to X. quercicola, Schwarz, from Florida. 
32. Xylophilus singularis. (Tab. VIII. fig. 24, ¢.) 
Moderately elongate, black, opaque, very densely clothed with fine, silky, closely appressed, bluish-white pubes- 
cence; the labrum and oral organs testaceous ; the elytra each with a somewhat rounded, sharply defined 
spot close to the suture at the base and a much larger one near the suture just below the middle, these 
spots densely clothed with dark fulvous-brown pubescence. Head large and broad, sparsely and minutely 
punctured ; eyes comparatively small, very widely separated, feebly emarginate, finely granulated, distant 
from the base of the head, the sides of the latter obliquely converging behind them; antenne ( 3) long 
and quite slender, the apical three joints somewhat abruptly larger, black, the two basal joints testaceous, 
joint 1 comparatively elongate, as long as 2 and 3 united, 2 more than half the length of 3, 3-8 elongate 
and subequal, 9 and 10 wider and subtriangular, each about as long as 8, 11 stouter and much longer 
than 10, ovate, acuminate; prothorax about as long as broad, narrower than the head, somewhat flattened 
on the disc, dilated at the sides before the middle and a little wider here than at the base, the sides com- 
pressed behind this (viewed laterally, with a deep transverse groove extending from the flanks upwards), 
the base feebly sinuate on either side, the surface closely and minutely punctured ; elytra rather short, 
nearly twice as wide as the prothorax, widest at the middle, parallel in front, broadly transversely 
depressed below the base, the space occupied by the basal spots a little raised, the surface very closely and 
minutely punctured; beneath black, densely pubescent; legs very long and slender, black, the tarsi and 
the anterior tibie fusco-testaceous; the hind femora ( ¢) slender, very little stouter than the others, 
emarginate on the inner side some distance before the apex (appearing subangularly dilated*), and 
grooved beneath ; the tibie almost straight. 
Length 23 millim. (¢.) 
Hab. Guatemata, San Lucas Toliman 5000 feet (Champion). 
One male example. This is one of a group of species somewhat numerously repre- 
sented in Central America, from the State of Panama to the Los Altos region of 
Guatemala. X. singularis possesses a very different facies from any other member of 
the genus: in the peculiar dense bluish-white submetallic pubescence it approaches 
X. argentatus. The eyes are almost entire and distant from the base of the head ; 
the antenne are very slender and elongate, and have the apical three joints stouter 
than the rest ; the thorax is dilated in front and compressed at the sides; the legs are 
very slender and elongate. 
83. Xylophilus suturalis. (Tab. VIII. fig. 25.) 
Elongate, parallel, moderately broad, black, densely clothed with fine pruinose pubescence, opaque (when 
denuded of pubescence shining) ; the head brownish in front, with a triangular olivaceous patch at the base 
(divided down the middle by a greyish line), for the rest grey; the prothorax with a sinuous olivaceous 
* Our artist has omitted to show this in the figure. 
2BB2 
