THE CANADIAN ENTOMOLOGIST. 303 



frontal crest well developed, not broken ; fovea minute, oval ; antennae 

 stout, much shorter than head and thorax ; joints subequal ; sheath 

 narrow, elongate, regularly tapering or sliglitly excavated beneath, clothed 

 with short black hairs ; cerci long and narrow and not extending to the 

 tip of sheath ; claws evenly notched or nearly so ; upper middle cell of 

 hind wings projecting one-third its length beyond lower cell ; venation 

 otherwise normal. (Colour black ; narrow inner orbits and cheeks 

 resinous, strongly infuscate ; spot between bases of antennie ; mouth- 

 parts generally, pronolum^ tegular, legs for the most part, and the central 

 area of venter of abdomen resinous infuscate ; bases of coxte darker, and 

 tarsi, especially posterior pair, more strongly infuscate than the rest of the 

 legs ; sheath edged with black ; veins brown ; stigma and costa distinctly 

 infuscate ; general surface of wings somewhat infuscate. 



Described from two females reared by Mr. Dyar from galls on Sa/ix 

 sericea. The species is allied to P. californica. 

 Type No. 3859, U. S. N. M. 



Pteronus carpini, new species. 



Larva. — Dyar, Journ. N. Y. Ent. Soc, VI., June, 1898, p. \2\. 



Female. — Length, 6 mm.; rather robust, shining; clypeus very 

 broadly and shallowly emarginate, nearly truncate ; vertex roughened 

 with coarse punctures ; ocellar basin distinctly defined, with prominent 

 walls ; crest strongly bent anteriorly, scarcely broken centrally ; fovea 

 triangular, deep, with sharp limiting ridges ; antennas long, very strongly 

 tapering, joints 3 and 4 subequal, 5 scarcely shorter ; sheath short, 

 rounded at tip, slightly emarginate beneath, clothed with dark brownish 

 hairs ; claws deeply notched, rays subequal ; venation normal, upper cell 

 of hind wings slightly exceeding the lower cell, stigma very robust. 

 Colour black ; small triangle below the antennal fovea, the clypeus and 

 other mouth-parts, pronotum, teguhe, legs for the most part, large sternal 

 spot, and the venter of the abdomen light resinous yellow : posterior legs 

 with the tips of their femora and tips of tibia? and all the tarsi black ; 

 edge of the abdomen dorsally and a central line, interrupted on the first 

 and last segments, yellow ; wings hyaline, veins and stigma dark brown. 



Described from a specimen reared by Mr. Dyar from gregarious 

 larv.T on "ironwood," either Ostrya virginica or Carpinus Carolina; 

 taken at Fort Lee, N. J., in Sejilember. hi the table of species (1. c, p. 45) 

 P. carpini will follow P. thoracicus. 



Type No. 3859, U. S. N. M. 



Pteronus quercus, Marlatt. 



Male. — Length, 4 5 mrn. ; rather robust ; structurally as in the female 

 except that ihe intercostal nervure is not interstitial (nor is it quite so in 

 the companion female) ; procidentia inconspicuous. Colour as in female, 



