123 



Orthotomicus lasiocarpi Sw. Can. Ent. 48: 183, 1916. 



The length, 2 mm.; slender. This species is allied to the typical 

 Pityokteines in the small size, the long second abdominal sternite and 

 the characters of the male genitalia; but is definitely related to the typical 

 Orthotomicus in the distinctly, though very obtusely, margined apex of the 

 declivity and the normal front of the female. The antennal club approaches 

 the condition found in Pityogenes; it is flattened, with the upper face obliquely 

 truncate on the distal half, the sutures visible only on the distal half and 

 slightly procurved, the outer segments showing distinctly from below. 



Host tree. Alpine Fir. 



Distribution. Rogers Pass, British Columbia. Taken in recently 

 felled trees with the foliage still green. 



The Genus Pityokteines Fuchs. 



Fuchs, Morph. Stud. u. Borkenk., 37, 1911. 



Key to the Species. 



A Moderately stout species, with the pronotum very little longer than wide 

 and rather sparsely punctured behind; the interspaces of the elytra 

 rather sparsely punctured on the disc, the declivital teeth moderate in 

 the females and very coarse in the males (PL 15, figs. 5, 6. 

 B The elytral striae hardly at all impressed, except the sutural striae, and 

 the strial punctures not very closely placed; the interstrial punctures 

 of the disc as large as those of the striae (PL 16, fig. 3). 



sparsus Lee. (balsameus Lee.). Page 123. 



BB The elytral striae finely, regularly impressed on the disc; the strial 



punctures very closely placed; the interstrial punctures smaller than 



those of the striae. elegans Sw. Page 124. 



AA Slender species, with the pronotum decidedly longer than wide, and rather 



closely punctured behind, the interspaces of the elytra rather closely 



punctured on the disc, the declivital teeth small in the males and minute 



in the females. 



B The elytra elongate, with the interstrial punctures much smaller than 



* those of the striae; the female declivity rounded behind as viewed 



from above, sulcate along the suture, densely deeply punctured, the 



teeth almost obsolete, represented by extremely minute granules; 



the male declivity moderately concave, with distinct but poorly 



developed teeth. minutus Sw. Page 124. 



BB The elytra with the strial punctures nearly as large as those of the 



striae; the declivity broadly rounded behind; the teeth of the female 



declivity very small but distinct, the male declivity concave, with 



the 2nd and 3rd teeth rather strongly developed and recurved. 



jasperi Sw. Page 124. 



Pityokteines sparsus Lee.; Am. Ent. Soc. Trans., 2: 160, 1868 (Xyleborus); 

 balsameus Lee., Am. Phil. Soc. Proc. 17: 625, 1878 (Tomicus). 



Length, 2 3 mm. The female has the front of the head flattened, finely 

 carinate, densely punctured and both this area the apical margin of the pro- 

 notum densely clothed with very long, incurved yellow hairs, and the elytral 

 declivity deeply sulcate, with three small teeth on each side. The male 

 has the front plano-convex, rather closely granulate-punctate, carinate, 

 lacking the long hairs of the front and apical pronotal margin; with the 

 teeth of the concave declivity much larger, the 2nd pair largest and in- 

 curved (PL 15, figs. 5, 6). 



