XYLEBORUS. 199 
narrower, the hind angles very obtusely rounded, the apical margin more convex, with only four prominent 
tubercles, the punctuation of the hind half a little finer and sparser. Scutellum short triangular, sub- 
convex, black. Elytra ample, about one-fourth longer than the prothorax and a little wider than its 
base, their basal borders separately rounded, the shoulders rectangular, the sides slightly rounded, little 
narrowed behind, the apical angles more abrupt and the apex more truncate than in X. godmani ; surface 
convex from the base to the summit of the excavation, punctured as in X. godmani, the inner interstices 
with one or two tubercles on the margin of the excavation, the outer interstices with short rows of small 
piliferous tubercles at their apex; excavation beginning at the anterior third, shallow, not sharply 
margined, rather shining, very finely rugulose, the side-margins obtusely elevated, preceded by a small 
sharp tooth at the apex of the second interstice and bearing about their middle an acute conical spine 
directed backwards and inwards, lower margin with a small tubercle on each side of the apex. Underside 
behind the prothorax fuscous, legs brown-testaceous, 
Hab. Panama, Bugaba (Champion). 
One specimen. This pretty species resembles X. celebs in the position of the 
elytral spines, but they are much more acutely conical and their base is much smaller 
than in the latter species, in which it extends forwards so as to be continuous with the 
upper border of the callosity. Bostrichus ruficollis, Fabr., may well be this species if, 
as is possibly the case, it is not an Amphicranus. 
4. Xyleborus sharpi, sp.n. (Tab. VII. fig. 12, apex of elytra.) 
Fem. Oblonga, subovalis, sat nitida, piceo-nigra, antennis pedibusque fuscis, parcissime pilosa; prothorace fere 
ut in X. godmani constructo; elytris prothorace tertia parte longioribus, apice oblique excavatis, 
excavatione ante medium incipiente, sat profunda, lateribus callosis et spina singula acuta in parte calli 
superiore armatis. 
Length 3°8 millim. 
Female. Oblong, subovate, rather shining, piceous-black with a few fuscous hairs round the sides of the 
prothorax and apex of the elytra. Front dull, reticulate and punctured, with traces of a median elevated 
line. Prothorax a little broader than long, its hind angles subrectangular, not broadly rounded, the sides 
parallel to the middle, the apex strongly but somewhat obliquely rounded, feebly bisinuate, with four or 
five small tubercles in the middle; surface as in X. godmani, FElytra a third longer than the prothorax, 
shaped as in X. sanguinicollis, but less ample, especially behind ; surface punctured as in that species ; 
excavation beginning before the middle, its fundus narrow and deep, subconvex longitudinally, rugulose, 
the sutural borders elevated, the sides strongly callose, the anterior border furnished between the suture 
and the lateral calli with two or three pointed tubercles, the largest at the apex of the second interstice, 
the calli with a sharp triangular spine at their anterior extremity, the lower margin more or less crenate 
or tuberculate, with a larger tubercle at the outer angle of the apical truncation. Underside piceous ; legs 
fuscous. ; 
Hab. Mexico, Toxpam (Sallé), Atoyac in Vera Cruz (7H. H. Smith) ; GUATEMALA, 
Paraiso (Champion). 
One specimen has been obtained from each locality. They differ slightly inter se in the 
rugosity and amount of gloss over the elytral excavation, and in the degree of tubercu- 
lation of its lower margin, which in the specimen from Atoyac is almost serrate, though 
much less strongly so than in the allied X. insignis, Eichh., from Cayenne. It is to 
X. sharpi among this group that X. insignis most approximates ; but it is a smaller 
and more cylindrical insect, with the elytral punctuation stronger than in any Central- 
American species, the excavation and its lateral calli very dull, coarsely and rugosely 
