54 Mr. Walter F. H. Blandford on the 
Provided that I have correctly identified all the five 
new species described by Hichhoff in 1878, this collection 
contains all known Japanese species except Hylastes 
attenuatus, Xyleborus badius, and Genyocerus adusti- 
penis, and all types peculiar to Japan except of that 
insect and the five referred to. 
The number of species, 104,* is perhaps a little above 
the mark, because I have been obliged to describe under 
separate names three male Xylebori which cannot be 
referred to their respective females. Ina few cases I 
may have subdivided a species into two, but it is likely 
that these are counterbalanced by others where I have 
included distinct species as varieties. Students of the 
iiuropean forms know that species closely resembling 
each other in appearance may differ in habits, food- 
plants, and the form of their galleries. In dealing with 
an exotic collection one has to do without the assist- 
ance of such facts. 
They are divided into 25 genera, of which three are 
new, Hyorrhynchus, Spherotrypes and Acanthotomicus. 
The two first are quite distinct; Spherotrypes is also 
found in India. <Acanthotomicus is a separation from 
Tomicus, Latr. (1807). I have restored Taphrorychus 
apatoides, Wichh., to Dryocetes, and do not include any 
Japanese species in the former genus. 
So complete a collection testifies both to the ability of 
Mr. Lewis as a collector and to the richness of Japan in 
this family, for, though it is probably surpassed in this 
respect by many tropical countries, its 104 species compare 
very favourably with the 130 or so described from Europe 
and the rather larger number from North America. 
There must be many others to discover. Not a few 
species are unique, others have occurred here and there 
as single specimens, and 7 out of the 18 first described 
have not reappeared. ‘I'he total number existing in the 
islands may be expected to exceed 150, 
The best represented genera are [Hylesinus (6 species), 
Phleosinus (7 species), Scolytus (6 species), Dryocetes 
(S species), and Xyleborus (29 species exclusive of males). 
‘The number varies from that given in the ‘ Proc, Ent. Soc.,’ 
1393, p. xxxix, as I have received, since then, additional specimens 
from Mr. Lewis’s unmounted Coleoptera, and a small number from 
Colonel von Schénfeldt. 
