THE CANADIAN ENTOMOLOGIST. 357 



brownish ; the front wings with the free part of R 4 twice as long as 

 the free part of R 5 ; the free part of R 4 and the radial cross- vein 

 straight ; the greatest length of the cell R 4 one and two-fifths 

 times the greatest length of the cell R s ; the legs finely, densely 

 sericeous; the posterior metatarsus four-sevenths of the length of all 

 the following ^segments together, the second segment about half as 

 long as the metatarsus, the third segment seven-tenths of the length 

 of the second, and the fourth about half the length of the third; the 

 saw-guides convex above and below, obliquely, convexly rounded to 

 a point at apex, setaa on apex and ventral margin practically 

 wanting. Length, 6.5 mm. Habitat, Algonquin, 111. W. A. 

 Nason, collector, Nos. 5804 and 581 1 lacinata, n. sp. 



12. Frontal crest not elevated above the general level of the basin 

 above it 13. 



Frontal crest strongly elevated above the general level of the basin 

 above it; body black, with the front and middle legs below the 

 knees, and the basal half of the hind tibiae and the basal two-thirds 

 of their metatarsi, white ; the walls of the pentagonal area distinct, 

 strongly expanded below into a pair of elevated, parenthesis-shaped 

 ridges, forming a frontal crest extending longitudinally to the bases 

 of the antennae rather than transversly, and rather broadly, deeply 

 broken at middle ; the area above the frontal crest flat, slightly 

 lower at middle, concave around the anterior ocellus, distinctly 

 lower than the upper margin of the frontal crest ; the V-shaped 

 furrow wanting ; the median fovea large, enclosed between the 

 curved lower ends of the frontal crest with furrows extending on 

 each side to the antennal fovea ; the hypoclypeal area elevated at 

 middle into a ridge of uniform width and height, twice as long as 

 wide ; the puncture on each side of the front large, situated near 

 the median dorsal end of the frontal crest, and without any indica- 

 tion of a transverse ridge below it ; the postocular area uniformly 

 convex, about twice as wide as long ; the front between the eyes 

 and the pentagonal area rather strongly concave ; the vertical 

 portion of the antennal furrow line-like, moderately deep, with 

 straight sides ; the interocular furrow completely wanting ; the 

 antenna; with the first and second segments together four-fifths the 

 length of the third, the third segment almost twice as long as the 



