PSYCHE 



VOL. XXVII FEBUARY, 1920 No. 1 



NOTES ON FOREST INSECTS. 



III. TWO NEW SPECIES OF PITYOPHTHORUS FROM 

 COLORADO. 



By M. W. Blackman, Ph.D., 



Professor of Forest Entomology, New York State College of 

 Forestry, Syracuse, N. Y. 



Pityophthorus bassetti sp. nov. 



Reddish brown 2f times as long as broad. 



Male — length 2.2 mm. The front with distinct elevated trans- 

 verse carina at level of upper inner angle of eye; above carina 

 coarsely punctured, somewhat rugose and shining; below carina 

 slightly excavated, more finely and densely punctured with mod- 

 erately short and fine hairs; epistomal margin bordered with longer, 

 coarser hairs; eyes rather elongate oval, not coarsely granular, 

 with anterior emargination as broad as deep; antennal club short 

 oval with segments sub-equal, first suture straight, second and 

 third procurved ventrally; outer part of funicle one third longer 

 than pedicel. 



Pronoium very little longer than broad, sides of basal half nearly 

 parallel but widest at the middle and very slightly arcuate; front 

 broadly rounded and rather weakly serrate on the margin; anterior 

 half armed with moderately coarse, acute asperities which are 

 often arranged in fairly regular concentric lines, with their bases 

 often continuous ; summit fairly prominent with slight but distinct 

 transverse depressed area immediately posterior to it which is 

 divided by a smooth slightly elevated median area and bordered 

 laterally by fainter elevated lines; depression more deeply and 

 densely punctate; punctures becoming finer and sparser poster- 

 iorly and finer laterally; basal marginal line fine but distinct, 

 slightly sinuate. Ventral surface of prothorax grooved and smooth 

 behind but distinctly punctured with fine hairs in front. 



