THE CANADIAN ENTOMOLOGIST. 359 



deep, linear, extending straight to the lateral ocelli, then bending 

 abruptly outward around the ocelli and extending for a short 

 distance beyond them ; the interocular furrow completely wanting ; 

 the antennae indistinctly segmented, the first and second segments 

 together three-fifths the length of the third, the third segment one 

 and one-half times as long as the fourth, the fourth one and two- 

 fifths the length of the fifth, the sixth seven-ninths of the fifth, the 

 sixth and seventh subequal, the eighth slightly shorter than the 

 seventh, the ninth slightly shorter than the eighth, strongly oblique 

 on the sides to a bluntly-rounded point at middle of apex ; the 

 thorax polished ; the wings infuscated, hyaline beyond the apex of 

 the stigma, the veins black, the costa and stigma infuscated luteous; 

 the front wings with the free part of R 4 one and two-sevenths longer 

 than the free part of R 5 ; the free part of R 4 bowed inwardly and 

 the radial cross-vein straight ; the greatest length of the cell R 4 one 

 and one-fourth times the greatest length of the cell R 5 ; the legs 

 sericeous ; the posterior metatarsus subequal in length to all the 

 following segments together, the second segment two-fifths the 

 length of the metatarsus, the third segment five-eighths the length 

 of the second, and the fourth one-half the length of the third; the 

 abdomen polished black ; the saw-guides retracted and impossible 

 of description. Length, 4 mm. Habitat, Wood's Hole, Massa- 

 chusetts. Described from two specimens received from Dr. 

 Harrison G. Dyar. Bred from larvae on Quercus 

 cocci/ice quercuscoaiuea, Dyar. 



Lateral ridges of the pentagonal area strongly and distinctly elevated 

 on the front below the lateral ccelli ; the body black, including the 

 coxae, trochanters, and femora except the knees, the knees and the 

 basal third of the tibiae white, the remainder of the tibiae and tarsi 

 infuscated ; the walls of the pentagonal area distinct, strongly 

 elevated below the lateral ocelli, becoming almost obsolete near the 

 middle of the front, the ventral ends dilated, the two portions 

 standing oblique to each other with their inner and outer margins 

 straight, forming an inverted V-shaped frontal crest strongly broken 

 at middle, and not elevated above the area immediately above it ; 

 the area above the frontal crest perfectly flat immediately above the 

 crest, becoming strongly concave in the region of the median 



