HETEROMERA. 459 
tatus, X. anthicoides, &c.; but it differs from all these in its large eyes and slender 
antennz, the latter with very short second joint. ‘The coloration of the elytra is different 
from that of any of the other species of the genus here described. 
30 (s). Xylophilus canescens. (Tab. XXI. fig. 11, 2.) 
@. Moderately elongate, slightly shining ; piceous, the antenne and legs obscure testaceous ; the upper surface 
somewhat thickly clothed with rather long ashy pubescence, the pubescence partly hiding the dense 
punctuation, the latter very fine upon the head and prothorax, coarser upon the elytra. Head consi- 
derably wider than the prothorax, narrowly extended on either side behind the eyes, the latter moderately 
large, separated by a space about equal to the width of the eye as seen from above; antennz scarcely 
extending to the middle of the elytra, slender, thickening a little outwardly, joints 1 and 2 stout, 2 much 
shorter than 1, 3 slender, considerably longer than 2, 3-10 gradually increasing in width, but almost 
equal in length, 11 ovate, very much longer than 10; prothorax a little broader than long, rather convex, 
slightly narrowed in front, the disc canaliculate anteriorly, and with a very deep, arcuate depression 
behind and a transverse groove on either side about the middle; elytra moderately long, about twice as. 
wide as the prothorax, widest beyond the middle, parallel anteriorly, depressed along the suture at the 
base, and with a shallow oblique groove on the disc extending from the shoulders inwards; legs very 
slender, moderately long. 
Length 2 millim. 
Hab. Mexico, Real del Monte 9300 feet (Lohr). 
One female example. This species comes near the preceding, X. odliquus, but has 
the first and second joints of the antenne stouter, the second not so short, the third not 
twice the length of the second. The insect is of a uniform piceous colour, clothed 
with rather long ashy pubescence. The slender limbs, deeply foveate thorax, &c., 
separate it from X. funereus and its allies. 
Xylophilus argentatus (p. 186). 
Mr. Flohr has sent us the fragmentary remains of a Xylophilus from Jalapa, Mexico, 
which belong to X. argentatus or to a closely allied species. This insect has a brown 
spot on the disc of each elytron close to the base (of which there is no trace in 
X. argentatus) and a triangular blackish-brown patch beyond the middle, this patch 
very deeply excised in the middle behind; the rest of the upper surface very densely 
clothed with bluish-white pubescence. 
31 (a). Xylophilus lactineus. (Tab. XXI. fig. 12.) 
Elongate, rather narrow, parallel, black, very densely clothed with fine, scale-like, closely appressed, bluish- 
white pubescence; the elytra each with a rounded black patch on the disc beyond the middle, this patch 
slightly excised in the middle behind; the upper surface thickly and finely punctured, the punctuation 
hidden by the pubescence. Head as in X. argentatus; antenne thickening a little at the apex, black, 
the two basal joints testaceous in one example, joint 2 scarcely shorter than 3, 5-10 subtriangular, 
decreasing in length, 9 and 10 about as broad as long, 11 much longer and stouter than 10, ovate, 
acuminate; prothorax as broad as long; elytra elongate, subparallel; legs slender, piceous, the tarsi 
paler, the femora and tibi clothed with bluish-white pubescence. 
Length 24-23 millim. (9.) 
Hab. Mexico, Amecameca in Morelos (fohr). 
3NN 2 
