ON SOME JAPANESE SPECIES OF THE SCOLYTINT. 
69 
many of them working in still living trees with green leaves, though already 
weak and half dead. 
The work (fig. 1) is made within the bark slightly grooving the surface 
of the wood. The primary or egg gallery is longitudinal and straight, 
sometimes one end is slightly curved ; 30 to 55 mm. long, 2.5 mm. wide; the 
entrance opened at one end obliquely toward the outside. The secondary 
or larval mines are made chiefly perpendicular to the primary gallery each 
with a pupa case at the extremity ; they are 45 to 75 mm. long. 
The beetle bores its galleries from June to the beginning of July and 
pass the winter in the larval state. The bark of the attacked wood peels 
off during the next summer, if the wood was fresh or newly felled when first 
attacked ; but the bark is found firmly attached to the wood and decays 
with it, when the tree was dead and quite dry at the time of the first 
entrance of the insect. 
Seolytus ehikisaniii" sp. n. 
(Plate IT. fig. 4, 5.) 
Female : 4.3 mm. long, black, with antennae, tibiae and tarsi reddish 
brown. The front of the head subconvex ; very thinly haired near the 
mouth. Vertex convex, finely punctate. Prothorax about as long as wide, 
its anterior margin reddish with moderately strong oval dots; the dots closer 
and deeper at sides and apex. Elytra as wide as the prothorax but little 
longer, and narrowed behind ; slightly reddish and separately rounded at 
the apex ; the suture near the scutcllum and the surface around it deeply 
depressed ; interstices flat, each with one row of fine dots ; puncta on the 
outer interstices large and strong, not distinguishable from those on the 
striae. Underside black with yellowish short hairs ; the side g,nd posterior 
margins of each segment reddish ; slightly concave to the second and third 
segments ; the posterior margin of the second, third and fourth segments 
thickened but not provided with a small median tubercle on each of 
them. 
1) I have collected this species in the firewood of the elm, which is called the “chikisani” by 
Ainu, the aborigines of Hokkaido ; so I have applied that name to this species. 
