on the Scolytide of Japan. 577 
up to the base from punctures which have at least the 
anterior margin elevated, so as to be subtuberculate. I 
have seen over a hundred examples of X. validws without 
finding any intermediate forms between the two species. 
The next species should follow Trypodendron quercus, 
on p. 124 :— 
Trypodendron sordidum, sp. u. 
Fem. Cylindrica, subelongata, parum nitida, sordide dilute 
testacea, capite, prothoracis antica dimidia parte medio, elytrorum 
lateribus et apice infuscatis, sat dense pilis subtilibus erectis 
adspersa ; antennarum clava breviter ovali, obtusa; prothorace 
longitudine breviori, anterius fortiter rotundato, apice bituber- 
culato, supra mox post medium obscure transverse elevato, basi 
reticulata, punctata ; elytris dense confuse punctatis, punctis hinc 
illinec in lineas ordinatis, apice convexo, substriato, ruguloso, 
densius piloso. Long. 3°8 mm. 
Hab. Japan; one specimen (coll. Lewis). 
Fem. Somewhat elongate, cylindrical, obscurely shining, 
dirty yellow testaceous, the head, the middle part of the anterior 
half of the thorax, the sides and apex of the elytra infuscate, the 
latter less deeply. Head rugosely punctured in front with a 
median smooth line, with thin erect pubescence, denser over the 
mouth ; antennal club short oval, obtuse in front, with rather thin 
pubescence, chiefly at the sides and apex. Prothorax broader than 
long, widest at the base, the sides strongly rounded from behind 
the middle to the apex, its anterior margin nearly circular, with 
two prominent median tubercles ; surface with an obscure trans- 
verse elevation just behind the middle, asperate anteriorly, the 
asperities forming fine transverse lines, posteriorly finely reticulate 
and rather dull, with fine punctures, subasperate in the middle line 
to the base, pubescence fine erect and short, thinner over the 
median area. Scutellum small, rounded, infuscate. Elytra 
two-thirds longer than the prothorax, and narrower than its base, 
their basal margins separately convex, the shoulders rounded, the 
sides parallel, the apex subcireularly rounded; surface cylindric, 
strongly declivous behind, with rather dense fine semi-erect pubes- 
cence, and close irregular punctuation very indistinctly lineate near 
the suture, apical declivity subconvex, more densely pilose, with 
closer subrugulose punctuation and traces of impressed strie. 
Underside and legs pale testaceous. 
This species is very like 7’. pubipenne, Blandf., but is 
more elongate and cylindrical. The club of the antenna 
