ON SOME JAPANESE SPECIES OF THE SCOLYTINI. 
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finely toothed ; the dots on the interstice finer than those on the striae, 
forming a single row. Underside black, with short yellow hairs ; the second 
abdominal segment strongly concave, the posterior margins of the second to 
the fourth segment thickened. 
Male: 3. 1-3.4 mm. long. The front of head flat, with a few long 
yellowish curled hairs near the mouth. Prothorax, elytra and abdomen just 
as in the female. 
Food plant. Ulmiis campcstris, Sm. 
Distribution. Hokkaido : Mt. Moiwa, near Sapporo, (N. MlTSUHASHl 
and NlISIMA). 
Scolytus curviventrcilis is very much like Scolytus chikisanii ; but the 
former is distinguishable from the latter by the dots on the prothorax, the 
finely toothed apical margin of the elytra and the strong concavity of the 
abdominal segments. In the middle of June, I got a male specimen at Mt. 
Moiwa under the bark of an elm tree ; while at the beginning and the end 
of the same mouth, Mr. M. MlTSUHASHl collected a male and a female at 
the same place. 
The work of Scolytus curviventralis is not yet made clear. 
Scolytus aequipunctatus sp. n. 
(Plate II. fig. 8, 9.) 
Black, shining, 2.4-2. 6 mm. long ; antennae, tibiae and tarsi yellowish. 
The front of head flat in both sexes with long aciculate scratches from 
mouth to vertex, margined with long curled yellowish hairs ; vertex 
convex, closely punctate. Prothorax as long as broad with shallow oval 
dots. Elytra as wide as prothorax and little longer, ruunded at apex ; 
surface depressed around the scutellum ; interstices narrow, each with a 
single row of dots but never double ; the dots on the interstices just the 
same as or rarely a little finer than those on the striae, but arranged more 
distantly. Underside black, with thin yellowish pubescence, abdominal 
segments simple, not concave. 
Food plant. Ulmus campcstris Sm. 
