Rhynchophorous Coleoptera of Japan. 89 
narrower than prothorax, and half as long again ; base truncate, 
its angles obtuse, sides weakly rounded to middle and subdilated, 
thence more strongly rounded to apex; surface with rows of 
rather small punctures, separately impressed and not striate, 
becoming weaker from base and nearly obsolete on declivity ; 
interstices slightly rugose, with one or two punctures at base ; apex 
obliquely declivous, convex and not impressed, with traces of one 
or two asymmetrical tubercles near suture. Underside piceous, 
scantily pubescent. Legs infuscate. 
This insect agrees with H. initans in its antennal 
structure, but is separable by the absence of distinct 
pubescence and the sparseness of the punctures on the 
hinder half of the thorax. The entire absence of any 
thoracic constriction and the antennal structure will 
distinguish it from the Pityophthori. 
Tomicus, Latr. (1807). 
The Japanese fauna appears to be poor in this genus ; 
perhaps other species remain to be discovered. 
Tomicus cembrae, Heer. 
Bostrichus cembrae, Heer, Obs. Ent. 1836, p. 28. 
A series taken from larch on Fujisan. 
The specimens show no essential difference from 
European examples. Like the Japanese Myelophilus 
piniperda, they run very large, averaging 0-5 mm. ‘The 
interstitial punctures of the elytra are very weak, but 
traceable. 1’. cembrae is recorded from Siberia and 
Amurland and no doubt occurs over the whole of N. 
Asia; in Europe it is confined to Pinus cembra, which 
is found in Japan, at least, as the variety puwmilus. 
I cannot find any Japanese specimens which correspond 
with Motschulsky’s 7. subelongatus. 
Tomicus angulatus, Hichh. 
Hichh., Scol. Jap., p. 200; Rat. Tom., p. 208. 
Taken commonly in several localities from fir (Pinus 
massomand); Nagasaki, Fujisan, Nikko. 
ACANTHOTOMICUS, nov, gen. 
Antennarum funiculus 5-articulatus, articulis 2—5 latitudine 
crescentibus, clava ovalis, compressa, suturis fere obsoletis fortiter 
