TRIBE II. IPINI. 



635 



1022 ( -). PITYOPHTHORUS TUBEECULATUS Eich., 1879, 498. 



A species found in West Virginia, mining under bark of terminal 

 twigs on young black spruce, Oct. 28, was determined by Eichhoff as iden- 

 tical with this California species. 



II. PITYOGENES Bedel, 1888. (Gr., "pine" -f "bearded.") 



This genus contains a few species now separated from Pityo- 

 phthorus by the teeth of the elytral declivity being much larger in 

 male than in female, while in both sexes the base of the pro- 

 thorax is without the fine raised line that borders it in the older 

 genus. (Fig. 137, A.) They bear a deceptive resemblance to 

 Xyleltorus and were all described in that genus by LeConte. 



SYNOPSIS OF SPECIES OF PITYOGENES. 



a. Declivity of elytra oblique, not sharply margined. 

 &. Declivity not punctured. 



c. Elongate smooth dorsal space each side of thorax. 1023. HOPKINSI. 



cc. Faint smooth dorsal carina at middle of thorax. 1024, PULLUS. 



&6. Declivity punctured. 1025. PUNOTIPENNIS. 



aa. Declivity of elytra nearly perpendicular. 102C. PLAGIATUS. 



1023 (9068). PITYOGENES HOPKINSI Swaine, Tech, Publ. N. Y. Coll. For., 

 1915, 8. 



Elongate-cylindrical. Blackish-brown, shining, sparsely clothed with 



very long, erect hairs; antennae and feet dark 

 ferruginous; head densely pilose, with long yel- 

 low hair in male. Prothorax a little longer than 

 wide, coarsely asperate in front, coarsely and 

 sparsely punctured behind, anterior margin 

 fringed with hairs which are half as long as 

 thorax. Elytra with rows of distant coarse 

 punctures, intervals with more distant but 

 equally coarse punctures; tip obliquely declivous, 

 impunctured, except in subsutural furrow, which 

 is well marked; face of declivity each side with 

 two large acute tubercles, and a third smaller 

 one at upper edge of slope, margin of slope with 

 three or four small denticles; extreme tip 

 slightly produced into an acute point. Tibiae with 

 only a few small teeth, front pair narrower than 



Fig. 148. X 24. 

 (After Blackman.) 



others. Easily known by smooth spot each side behind the middle of 

 thorax. Length 2 mm. (Fig. 148.) 



P. sparsus Lee. (1868, 160), described from Lake Superior, is 

 said by Swaine to be misapplied to this, the most abundant bark 

 beetle in limbs of pine. Occurs in Canada, West Virginia and 

 Massachusetts, under white pine bark. In West Virginia mines 



