Rhynchophorous Coleoptera of Japan. 119 
I have not seen X. fallax, Eichh., to which this 
species is allied in the structure of the elytra; but the 
former differs according to the description in several 
points. Itis more elongate, with the posterior half of 
the prothorax very finely punctured, the apical emargi- 
nation of the elytra deep, and the impressed surface 
rugosely punctured. 
Xyleborus exesus, sp. 0. 
Fem. Elongata, cylindrica, nitida, pares pubescens, piceo- 
nigra, antennis pedibusque ferrugineis ; prothorace oblongo, parum 
gibboso, postice distincte ac discrete punctato, linea media laevi ; 
elytris lineato-punctatis, interstitiis subtilius uniseriatim punctatis 
subrugulosis, apice oblique declivi, fortiter excavato-retuso, 
margine elevato utrinque bispinato, infra subcirculatim emargi- 
nato. Long. 3°6 mm. 
Two examples, Miyanoshita. 
Cylindrical, pitchy-black. Head dull, convex, with long thin 
pubescence, mouth ciliate, front punctured at sides, with an 
elevated smooth space widened behind and impressed in middle, 
eyes broad oval, anteriorly emarginate, antennz ferruginous. 
Prothorax about one-half longer than broad, base slightly rounded, 
basal angles obtusely rounded, sides subparallel behind becoming 
rounded gradually and more strongly towards apex; surface 
cylindrical behind, declivous in front, but without median elevation, 
its pubescence thin, rather long at apex and sides, absent over 
basal area, anterior half with fine imbricate asperities, posterior 
half shining, distinctly punctured, with a smooth central line, the 
punctures stronger and more scattered towards the base. Scutel- 
lum small, rounded, not depressed. Elytra as wide as prothorax, 
and rather more than half as long again, base truncate, shoulders 
subrectangular rounded, sides parallel to behind middle, thence 
gently rounded to apical border, which is strongly and almost 
abruptly rounded, with the median third subcircularly emarginate ; 
surface shining, gently convex from base to apex, with a few 
hairs, distinctly punctured in rows, first stria with punctures 
stronger towards base, but not impressed ; interstices rugose, 
with a row of fine scattered punctures, the first widened postericrly 
with two or three fine tubercles before declivity, which is very 
oblique, beginning at the base of the posterior third of the elytra, 
and excavate; the excavation smooth, impunctate, and shining, 
with the suture narrowly ‘elevated, its lateral margins sharply 
