THE CANADIAN ENTOMOLOGIST. 355 



the cell R 4 only one-fifth greater than the greatest length of the cell 

 R 5 ; the legs finely sericeous ; the posterior metatarsus about sub- 

 equal in length with all the following segments together, the second 

 and third segments subequal, and the fourth segment one-third the 

 length of the third ; the abdomen black ; the saw-guides retracted, 

 uniformly convex below and appearing quite strongly narrowed to 

 a blunt point at apex. Length, 5.5 mm. Habitat : Oswego, N. Y. 

 C. S. Sheldon, collector lobata, n. sp. 



Frontal crest very narrowly interrupted at middle, the head finely 

 punctured ; the body black, with the front and middle tibiae and 

 the apical segment of their tarsi infuscated ; the head uniformly, 

 sparsely, shallowly punctured ; the walls of the pentagonal area 

 distinct, expanded below into strongly dilated, mound-like areas, 

 forming a broad frontal crest narrowly and shallowly interrupted at 

 middle ; the area above the frontal crest broadly flattened, enclosed 

 by high bounding ridges below the lateral ocelli, and extending 

 broadly behind into the postocular area ; the V-shaped area want- 

 ing ; the median fovea represented by a rounded depression situated 

 between the enlargement of the frontal crest and the elevated part 

 of the hypoclypeal area ; the hypoclypeal area broadly convex, 

 somewhat higher adjacent to the middle fovea ; the puncture on 

 each side of the front large and situated above the enlarged ends of 

 the frontal crest ; the postocular area distinctly broader than long, 

 depressed in front and convexly rounded behind ; the front between 

 the eyes and the walls of the pentogonal area strongly concave ; 

 the vertical portion of the- antennal furrow linear and straight ; the 

 interocular furrow completely wanting ; the antennae with distinct 

 segmentation, the first and second segments together two-thirds the 

 length of the third, the third segment one and one-half times as long 

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

 the sixth, seventh, eighth and ninth segments subequal, and each 

 about one-half the length of the fifth, the ninth straight on one side 

 and gradually rounded on the other side, and at apex to a blunt 

 point on one side ; the thorax polished, sparsely punctured, 

 sericeous ; the wings slightly infuscated, the veins, including the 

 costa and the stigma, black ; the front wings with the free part of 

 R 4 distinctly longer than the free part of R.„ the free part of R 4 



