‘414 
DIAPUS IMPRESSUS, Janson, 
References :—Jan. Ind. Mus. Notes III. 1. 74. Stebbing. Injur. Ins. Ind, 
For. p. 62, 
Classification :—Order, COLEOPTERA. Family, Scolytide. Sub- 
Family,P!atypini. 
Tree attacked—Quercus incana, (Ban oak). 
Description. 
Larva.—White, legless, with a light orange-yellow head and 
black mandibles. It differs from a Scolytid larva in being 
almost straight instead of curved. 
Beetle.—An elongate narrowish insect with long weak tarsi, 
Red-brown, shining, basal margin of the thorax and elytra 
brownish yellow, apical portion of the latter red-brown, legs and 
antennz pale yellow; the knees brownish. Head vertical, a little 
broader than thorax, dull,sparsely punctured. Antennz with the 
scape broadly pyriform. ‘Thorax oblong, strongly emarginate at 
the sides before the middle, the basal margin bi-sinuous, a row of 
hirsute punctures close to the anterior margin, the base finely 
and closely punctured and with a slight median line. Elytra 
punctate-striate, the second stria from the suture and the outer 
marginal one broader and more strongly punctured, the first and 
second interstices from the suture strongly raised, the fourth 
slightly convex ; the apex coarsely punctured, sub-truncate and 
unarmed in the male, in the female with five acute apical spines. 
Under-surface light orange-yellow between the second and third 
pair of legs, brown anteriorly to this, and dark-brown to black on 
abdominal segments which are very short. Abdomen densely 
pubescent at the apex in the male, in the female concave and 
rugulose. Anterior tibize crenulate on the outer side, the tarsi 
very slender and longer than the femora and tibize together. 
Posterior tibiz triangular, the first joint of the tarsi rather longer 
than the tibiz, broad, flattened, and ciliate, the remaining joint 
slender and together about half the length of the first. 
Life-History. 
Specimens of this beetle were taken as long ago as 1891 at 
Deoban, Jaunsar, where they were found boring into oak stumps. 
Nothing further has been heard of this beetle, nor does it appear 
to have been ever taken since. 
