XYLEBORUWS. 211 
23. Xyleborus imbellis, sp. n. 
Fem. Hlongata, cylindrica, subnitida, dilute testacea, prothoracis apice nigricante, densius equaliter pubescens ; 
prothorace latitudine longiore, apice rotundato, dorso haud gibboso, posterius sat fortiter punctato ; elytris 
illo sesquilongioribus, postice subangustatis, striato-punctatis, interstitiis irregulariter seriato-punctatis, 
apice oblique declivi, parum convexo, confuse punctato, inermi. 
Long. 4°7 millim. 
Female. Elongate, cylindric, moderately shining, pale testaceous-brown, with the extreme apical margin of the 
prothorax blackish, completely clothed with rather close fine suberect pubescence. Prothorax longer than 
broad, widest before the middle, narrowed and strongly rounded anteriorly, the apex a little more obtuse 
in the middle, the sides straight behind, the hind angles subrectangular, the base subtruncate ; dorsum 
curved throughout from base to apex, slightly behind, strongly declivous in front, with the cephalic 
opening longitudinally oval and nearly horizontal, without trace of any gibbous elevation, thickly 
pubescent at the apex, more thinly behind, its anterior half with fine dense asperities, the hinder half 
with close strong punctuation, weaker towards the middle. Scutellum minute, rounded, infuscate. 
Elytra rather less than one-half longer than the prothorax, truncate at base, the shoulders rounded, the 
sides feebly curved throughout, widest before the middle, and very slightly narrowed posteriorly, apex 
rather abruptly and obtusely rounded; surface longitudinally convex, obliquely declivous behind the 
middle, with shallow irregularly punctured striz; interstices flat, the inner ones with irregular double 
series, the outer ones with single series of finer piliferous punctures; declivity somewhat flattened, 
irregularly punctured, without trace of strie or tubercles. Underside and legs light testaceous, pubescent ; 
spines of the tibize strong, not numerous. 
Hab. Guatemata, San Juan in Vera Paz (Champion). 
One example. This species is exceptional in that the prothorax has no sign whatever 
of the usual median elevation, and the elytra are entirely without apical tubercles. 
The head in the type is completely retracted into the prothorax and cannot be 
described ; nor can the structural characters be fully made out, but, as far as observable, 
they show no cause for separating it from this genus. The pubescence is dense and 
somewhat downy, resembling that of X. pelliculosus, Eichh., and some other Oriental 
species. Iam inclined for the present to place it in the genus near the latter species. 
24. Xyleborus intersetosus, sp. n. 
Fem. Oblonga, cylindrica, piceo-fusca, pedibus testaceis, breviter erecte griseo-pilosa: prothoracis dorso ante 
medium transverse elevato, postice subopaco, sparsim piloso et minute punctato; elytris subparallelis, 
subtilissime lineato-punctatis, lineis brevissime, interstitiis longius uniseriatim setosis, horum setis e punctis 
subasperatis, post medium ex tuberculis parvis egredientibus. 
Long. 1°8 millim. 
Female. Oblong, cylindric, piceo-fuscous, the base of the prothorax and elytra a little lighter and more reddish, 
with short erect griseous pubescence. Front flattened, finely reticulate, punctured towards the sides, 
sparsely hairy, the mouth ciliate. Prothorax rather longer than broad, the sides slightly curved, but not 
narrowed from the base to the anterior third, the apex strongly rounded, the hind angles broadly and 
obtusely rounded, the base subtruncate ; disc with a slight antemedian transverse subcarinate elevation, 
asperate in front, its posterior half obscurely shining, with a delicate reticulation and fine scattered 
piliferous punctures. LElytra as wide at base as the prothorax and one-half longer, with subrectangular 
shoulders, the sides subparallel, not narrowed behind, the apical margin strongly rounded ; surface sub- 
cylindrical to the hinder third, thence obliquely declivous, moderately shining, with non-impressed rows 
of fine punctures bearing very short semi-decumbent hairs, interstices flat, with a single row each of larger 
erect sete arising from small subasperate punctures, which become developed behind the middle into 
2 EK 2 
