﻿122 Nciv York State College of Forestry 



The species is named in honor of Dr. E. M. Patch, P]ntomologist 

 for the Maine Agricultural Experiment Station. 



Pityophthorus biovalis n. sp. 



Description of adult female: Dark reddish brown; length, 

 1.9 mm. ; three times as long as wide. 



Front with a concave area of three-fourths of a circle, extending 

 from eye to eye, bordered with moderately long, stiff, slightly in- 

 curved hairs, divided longitudinally by an elevated ridge or carina 

 which is sulcate along its summit and sparcely pubescent with 

 short, stiff hairs on the upper two-thirds, with a rather deep, oval, 

 glabrous and shining concavity at each side ; epistoma:! margin 

 sinuate, with short, stiff hairs slightly longer at the center. Eyes 

 distinctly emarginate. Antennae lighter in color, club more than 

 one and a half times as long as funicle, oval, first tw^o sutures 

 subequally arcuate. 



Pronotum 1.26 times as long as broad; sides subparallel on the 

 posterior part, slightly constricted in front of middle, and broadly 

 rounded anteriorly ; front margin serrate ; anterior half moderately 

 asperate ; summit prominent ; transverse depression fairly pro- 

 nounced ; median and lateral impunctate areas slightly elevated ; 

 posterior half of pronotum moderately, rather finely, but deeply 

 punctate on the disc and sides; posterior marginal line distinct, 

 slightly sinuate. 



Elytra wider than thorax, sides slightly arcuate ; very broadly 

 rounded (sub-truncate) behind; first stria impressed, the others 

 not ; strial punctures of moderate size, deep, in not entirely regu- 

 lar rows ; punctures of the interspaces nearly equal in size, not 

 numerous but more so in the second interspace and at the sides, 

 disc shining and appearing glabrous from above, but wdth a few 

 short hairs which are more numerous and longer at the sides. 

 Declivity abrupt, with rather deep, shining sulcus, suture elevated, 

 rather narrow; lateral elevations high and abrupt, each with a 

 row of small, irregular, blunt teeth along its summit. 



Male of the same general proportions, but slightly smaller 

 (length 1.85 mm.) front plano-convex, sulcate along the median 

 line, with a light reddish-browm, oval area at each side, each appear- 

 ing spongy at its center, shining and glabrous at its periphery; 

 declivity wath sulcus narrower than in the female, wath the lateral 

 elevations apparently not so high, but with a blunt tooth-like 

 prominence opposite the thii-d interspace. 



Type — A female. Brunswick, Maine, June 29, 1919, M. W. 

 Blackman, collector, N. Y. S. Col. For. Lot No. M-62-a. 



Host Trees — Red spruce (Picea rnhcns Sarg.) and white pine 

 (Pinus strohus L.). 



While but one specimen of each sex of this species was taken the 

 characters, especially those relating to the female frons are so 

 strikingly different from known forms that it is readily separated 

 by them alone. The female w^as taken June 29 from the twigs of 



