72 
V. NIISIMA. 
Distribution. Honshiu : Gifu (Y. NAWA), Hokkaido : Sapporo and 
Tomakomai in Prov. Iburi (NllSIMA). 
Scolytus aequipunctatus is the smallest species of the Japanese Scolytus 
yet recorded, and it is nearly allied to Scolytus inultistriatus Marsh, in 
appearance ; but the former is distinguishable from the latter by having no 
oblong process in the second abdominal segment and by the black colour of 
its elytra, and it differs from Scolytus japonicus ClIAP. by the stronger dots 
on the interstices. 
The work of Scolytus aequipunctatus that I found under the bark of an 
elm tree at Mt. Moiwa, has a very close resemblance to that of Scolytus 
japonicus; but is not so deeply grooved on the wood. The primary gallery 
is straight and 15-20 mm. long, the secondary mines are irregularly curved. 
The attacked tree was not yet quite dead having green leaves still on its 
branches ; but it was weak and unhealthy. The beetle appears from the 
middle of June to the end of July. 
Scolytus japonicus Chap. 
Bruxelles, Ann. Soc. ent. Belgique, 1875, p. 199. 
London, Trans. Ent. Soc., 1894, p. 77. 
(Plate II. fig. 10.) 
Food plant. Plum tree (M. Lewis), apple tree. 
Distribution. Honshiu and Kiushu (M. Lewis), Hokkaido ; Junsai- 
numa (Blandford), Maruyama, near Sapporo (N. MitsuiiaSHI), 
Kotoni near Sapporo (M. Isi-IIDA). 
My specimens, which were collected at Kotoni by Mr. M. ISHiDA, the 
assistant of Entomology in our college, and at Maruyama, a small hill near 
Sapporo, by M. MITSUIIASHI, are much larger than those described by F. 
CHAPUIS ; but the structure of the head and the abdomen, colour and 
markings of the elytra are exactly identical My specimens arc seven in 
number and are 2.8-3. 5 nun. long. 
I was informed by M. Lewis 15 that Scolytus japonicus Chap, attacks 
1) Bruxelles, Ann. Soc. ent. Belgique. 1S75, p. igg. 
