34 THE CANADIAN ENTOMOLOGIST 



the transverse part of M2 wanting, the cells R3 and Mi not limited at the margin 

 of the wing by a vein; abdomen with the basal plates not divided at middle. 



This genus is related to Tenthredopsis and Rhogogastera, from the former 

 of which it is separated by having the basal plates undivided and from the latter 

 by lacking the free part of R4, and the transverse part of M2 in the hind wings 

 of both sexes. 



Leucopelmonus confusus Nort. 



1869. Tenihredo. Norton, Trans. Amer. Entom. Soc, 2, 24. 



1887. Tenthredopsis, Cresson, Syn. Fam. Gen. Hymen. Amer., 169 annuli- 

 cornis Harrg. 



1893. ? Tenthredopsis, Harrington, Can. Entom., 25, 61, turbata Rohwer. 



1911. Perineura, Rohwer, Proc. U. S. Nat. Mus., 41, 408, annulatus 

 MacG. 



1917. Leucopelmonus, MacGillivray, Bui. Conn. Geol. Nat. Hist. Surv., 

 22, 83. 



Female. — Head, including the clypeus, finely, densely, shallowly punctured; 

 the clypeus narrowly, deeply emarginate, the bottom of the emargination 

 transverse, the sides oblique, the clypeal lobes large, broadly truncated; the 

 antennal furrows broad, deep, and distinct, more linear between the lateral 

 ocelli and the caudal margin of the head, parallel; the caudal portion of the 

 head distinctly margined, deeply interrupted by the antennal furrows; the 

 postocellar area very convex, quadrangular; the ocellar furrow distinct, broadly 

 rounded, connecting with the antennal furrows and a short, interocellar furrow 

 continued as a slight V-shaped depression surrounding the median ocellus; the 

 ocellar areas not elevated adjacent to the lateral ocelli, forming well elevated 

 ridges continuous with the distinct antennal plates and elevated flat supraclypeal 

 area; the median fovea wanting; the dorsal end of the supraclypeal area abrupt, 

 forming the ventral boundary of the deep ocellar basin, extending from the 

 supraclypeal area to the median ocellus, the ocellar basin variable in depth, 

 the ventral portion sometimes smooth; a distinct lateral fovea adjacent to the 

 dorsal end of each antennal plate; the antennse with the third and fourth seg- 

 ments subequal or the third slightly longer than the fourth, the fourth dis- 

 tinctly longer than the fifth; the pronotum sparsely coarsely punctured; the 

 median and lateral lobes of the mesonotum polished, with sparse punctures 

 bearing seta;; the mesoscutellum and axilhie densely granular, the mesopost- 

 scutellum polished with a few punctures, the lateral portions sometimes slightly 

 finely striated; the mesoscutum finely densely granular; the mesopleura with 

 the dorsal portion finely densely punctured, gradually merging with the granular 

 ventral portion and polished mesosternum; metaplcura granular; the wings 

 hyaline, the proximal half of the stigma pale, the veins including the costa 

 brownish; the claws cleft, the inner lobe about one-fourth the length of the 

 outer; the cephalic tibial spurs enlarged, angularly bifurcate at the distal end; 

 the abdomen polished, sparsely setaceous; the saw-guides slender, the dorsal 

 margin straight, the ventral margin rounded, continuous with the strongly 

 obliquely convex distal portion, the dorsal and distal margins forming a sharp 

 angle; the distal and ventral margin bearing long setae; the cerci short and 

 truncate; colour rufous shading to whitish with the following parts black: the 

 first to fourth segments of the antenna:^, the distal half or whole of the seventh, 



