OX SOME JAPANESE SPECIES OF THE SCOLYTIXI. 
73 
the plum tree ; but at Kotoni, a village near Sapporo, it attacked the apple 
tree. The beetles appear about the middle of August and bore into the 
bark. The primary gallery is longitudinal, short and straight, being 10-30 
mm. long and 2 mm. wide, and deeply grooved on the surface of the wood. 
The secondary galleries are long and narrow ; some of them change their 
direction at distance of 30 or 40 mm. from the primary and appear as if they 
were branched (Fig. ioj. 
Healthy and vigorous trees are attacked by this species not only on 
their large main stems, but also on their branches of about 30 mm. in 
diameter. The attacked trees are gradually weakened and many of them 
are finally killed, so that this insect is very injurious to apple culture. 
Seolytus aratus Blandford. 
London, Trans. Ent. Soc., 1894, p. 79. 
Food plant. Ulmns campestris Sm. 
Distribution. Hokkaido : Junsai-numa (BLANDFORD), Sapporo 
(NllSIMA). 
I have collected three female specimens of this species on the bark of a 
dead elm tree in the middle of July. They are all furnished with yellowish 
white hairs near the apex of the last abdominal segment ; the hairs are 
moderately long, not “ breviter piloso ” as W. F. H. BLANDFORD described ; 
but I have no male specimen and I can not here delineate the difference 
between the male and female of this interesting species. 
