TRIBE IV. SCOLYTINI. 589 



The beetle issues in June or July, bores into the tree, trunk, 

 branch or even twig, but mainly the trunk or larger branches, 

 placing the eggs, 20 to 50 in number, each side of a vertical cham- 

 ber, half an inch or more in length. The larvae bore their cylin- 

 drical chambers through the inner bark, at first transversely and 

 diverging, but afterwards lengthwise along the bark. They remain 

 torpid during the winter and pupate the following May, issuing 

 through a hole in the bark, so that a badly infested tree looks as 

 though it had been peppered with No. 8 shot. 



910 ( -). SCOLYTUS FICE^E Swaine, 1910-ta, 34. 



Shining black, elytra sometimes with reddish tinge, antennas, tarsi 

 and mouth parts yellowish. Head shining, dorsal face with large punc- 

 tures; antennal scape short, first joint of funicle globular, remaining six 

 segments gradually wider; club pubescent, suboval, sutures strongly an- 

 gulated, a strongly chitinized piece deeply imbedded in first suture; front 

 flattened, more strongly in male, densely, coarsely punctate, with yellow 

 hairs. Pronotum smooth, shining, black, except for a reddish tinge in 

 front, glabrous except for a few hairs near the edge which is sharp and 

 distinct. Elytra nearly parallel, posterior outer angles rounded; disc 

 glabrous, sides and caudal depression slightly hairy, deeply impressed 

 about scutellum, punctate-striate, the strige distinct and deeper at base, 

 less distinct on sides; interspaces also punctate-striate with smaller punc- 

 tures. Beneath coarsely punctate with setaa arising from punctures; 

 ventral segments strongly ascending, the second bearing from the center 

 a blunt spine, slender and pointing obliquely downward, male, much 

 shorter and conical, female. Length 2.2 3 mm. 



Steuben Co., Ind., June 18, under bark of tamarack. Hudson, 

 Quebec, in branches of Picea canadcusis Mill. Full grown larvae 

 were found May 24 ; adults emerged June 6 ; egg-laying com- 

 menced again early in July. 



911 (9145). SCOLYTUS FAGI Walsh, Pract. Ent., II, 1867, 38. 



Black, shining. Head of male flattened, slightly concave, covered 

 with erect yellow hairs, rugosely punctured. Prothorax oblong, narrowed 

 in front, broadly rounded on the sides, punctures distant, finer upon the 

 disc than at sides, glabrous, except towards the front angles, where there are 

 a few scattered hairs. Elytra with distinct strias formed of approximate 

 subquadrate punctures; intervals broad, flat, marked with a row of fine 

 distant punctures: tip rugosely punctured. Venter strongly retuse in 

 front, segments coarsely punctured except at the hind margins, which are 

 smooth and slightly elevated; antennas ferruginous, feet brown. Length 

 5.5 mm. 



Described from Illinois. Occurs also in Texas. Food plants, 

 Celtis occidentaUs L. and Fagus americanus Sweet. "It is found 

 boring partly in the solid wood in all stages. So numerous were 



