2 Psyche [February 



Elytra equal in width to the thorax; sides nearly parallel but 

 slightly widest near middle, suddenly and strongly rounded 

 behind origin of the declivity with tips sub-acuminate; strial 

 i:)unctures moderately large and deep, not entirely regular near 

 suture; striie not impressed; interstitial punctures very sparce 

 and of moderate size; nearly glabrous above but with a few fine 



Fig. 1. 1, Dorsal view of male paratype of Pityophthorus bassetti, sp. no v., 

 magnified 11 diametera; 2, lateral view of male, magniSed 12 diametera; 3, front 

 view of head of female, showing the circular pubes-cent area bordered by longer 

 and coarser hairs, magnified 32 diameters. 



short hairs, these becoming more abundant and longer at sides 

 and behind. Declivity steep with deep wide sulcus; suture wide, 

 elevated, with several coarse granules near apex; lateral elevations 

 with fairly sharp serrate edge armed with 10 to 12 moderate sized, 

 black teeth, each with a stiff tactile hair arising from its inner 

 base. Last ventral abdoriiinal segment deeply and very broadly 

 emarginate. 



Female, slightly longer (2.4 mm.) and of same width. Differs 

 from male in having the frons very slightly concave, with a nearly 

 circular area finely and densely punctured and pubescent and 

 bordered with longer coarser incurved hairs. Elytra much less 

 hairy at sides and rear than in male. Lateral elevations of the 

 declivity with serrations of the male replaced by a sparse row of 

 minute granules, long tactile hairs absent. 



From Pitkin, Colorado. Bred from material brought in by Mr. 

 R.O. Bassett, Jr. 



Host tree: Picea engelmannl Engelm. Will also breed suc- 

 cessfully in Abies balsamea (Linn.) Miller. 



