—54— 



Remarks on North American Scolytids. 



By E. A. Schwarz, Washington, D. C. 

 (Concluded from p. 42.) 



Chramesus Chapuisii. 



The two males I have seen are at once distinguished from those of 

 icoricB by the fringe of rather long, sparse and stiff bristles on the anten- 

 nal scape. In the many males of icoricc which I examined the fringe is 

 entirely wanting. 



Rhopalopleurus pumilus. 



This is mentioned in Mr. Henshaw's Check List; but I do not know 

 upon whose authority it is claimed as a North American insect. At any 

 rate it must enter the genus Chramesus with which Rhopalopleurus is 

 synonymous. 



Cnesinus strigicollis. 



The two sexes may be distinguished as follows: 

 Male: Front shining, flattened between the eyes, anteriorly trans- 

 versely depressed, the depression clothed with short grayish hair and 

 with a flattened tubercle on each side; antennal scape elongate, curved, 

 sutures of club fringed with long and conspicuous hairs. 



Female: Front subopaque, sharply margined between the eyes, 

 anterior impression deeper, clothed with very dense reddish-brown hair 

 and without tubercles, antennal scape shorter, not curved, hairs of club 

 shorter and very fine. 



Bothrosternus. 



This genus was introduced into our fauna in the second edition of 

 the Classification by Drs. Leconte and Horn but the only North Ameri- 

 can species has not yet been described. Only a few specimens are known 

 in collections, and as the majority of them happen to be before me, the 

 description of an isolated species may be excused. 



B. Hubbardi n. sp. Oblong-ovate, reddish brown, shining, nearly glabrous 

 above, antenna? and legs reddish. Vertex finely punctulate, front smooth, longitu- 

 dinally excavated, the excavation with a deeper median line and anteriorly with a 

 tubercle on each side; beak extremely short, smooth, and with a median tubercle. 

 An acute ridge runs each side above the insertion of the antennre to the middle of the 

 eyes and is continued along the inner margin of the eyes by a series of stiff yellowish 

 bristles which increase in length posteriorly. Thorax convex, a little wider than long, 

 sides nearly straight from base to middle, thence very much rounded, hind angles 

 rectangular, anterior angles very obtuse, surface densely strigoso-punctate, without 

 smooth median line but with the punctures on the disk and middle of base not oblong 

 and sparser, side margin indicated from base to beyond middle, flanks densely rugo- 

 sely punctate. Scutellurn hardly depressed. Elytra twice longer and at base distinctly 

 wider than the thorax, punctate-striate, interstices flat, rather sparsely rugosely 

 punctate, on the disk wider than the striae, narrowing on the declivity and each lieing 

 furnished on the posterior half of the elytra with a row of semi-recumbent, short, 

 yellowish bristles. Underside with sparse, short pubescence, front coxa 1 still mor.' 



