44 E. T. CRESSON. 



etigma blackish, pale at base; legs yellow-fulvous, four posterior knees, tips of 

 their tibiae more or less and most of posterior tarsi, black, four anterior tarsi 

 more or less dusky. Length .40 — .45 inch. 



Hah. — Canada; New Hampshire; Colorado. (Coll. Am. Eat. Soc.) 



Tenthredo decorata Provancher, Nat. Can. x, 200. — " 9 • — Length .46 

 inch. — Black, moderately long; head and thorax strongly punctured; clypeus, 

 labrum, collar, tegulse in part, a small transverse line on vertex, a small spot 

 on flanks, a large spot on scutellura divided posteriorly into two rounded lobes, 

 a square spot on each side of median line of basal plates, a spot on posterior 

 coxae and the legs in part, white; clypeus deeply emarginate; labrum scarcely 

 rounded; antennae of moderate length; legs black, tips of all the superiors (?) 

 before, a spot at base of the posteriors, (?) all the trochanters, anterior tibiw 

 before and a broad annulus on the two posterior pairs, white; tarsi white, with 

 tips of the joints black; wings hyaline, slightly obscure towards the tip, nerv- 

 ures, costa and stigma black; abdomen robust, densely punctured." 

 Hah. — Canada. (Coll. Provancher). 



Tenthredo nimbipennis Norton ; Cress. Trans. Am. Ent. Soc. iv, 155. — 

 5 . — Deep black, smooth and polished, much more slender than atroviolaceus ; 

 mandibles with a large white spot, tips reddish ; antennae longer than head and 

 thorax, slender; wings large, blackish, strongly violaceous, apex paler; legs 

 slender, anterior knees and tibiae within, and the four anterior tarsi more or 

 less except tips of joints, pale luteous; abdomen long, flattened, subfusiform, 

 apex obtusely pointed. Length .50 — .55 inch. 

 ■ ZTai.— Texas. (Coll. Am. Ent. Soc.) 



Tenthredo delta Provancher, (Pachyprotasis), Nat. Can. x, 108. — 9 • — 

 Black; face beneath antennae, broad anterior orbits, dilated at summit of eyes, 

 spot on lower part of cheeks, clypeus, labrum, mandibles except tips, palpi, 

 narrow lateral margin of prothorax, tegulae, scutellum, large spot on pleura, 

 spot above posterior coxae, all the coxae more or less, and the trochanters, 

 "white; anterior margin of clypeus truncate; antennae long and slender, tinged 

 "with brown, joints 3 — 5 long and of equal length ; wings hyaline, nervures and 

 stigma fuscous, costal nervure and apex of stigma pale, under wing with one 

 or two middle cells; legs yellow, femora tinged with ferruginous, tips of pos- 

 terior femora and of their tibiae black; abdomen shorter than usual and rather 

 broad, honey-yellow, shining, basal plates except spot on apical middle, most 

 of first segment and the fifth and following segments, black; sometimes the 

 apical margin of fifth segment is honey-yellow. Length .27 — 30 inch. 



%. — Like the 9 except that the antennae are longer and paler in color; 

 under wing without middle cells; tips of posterior femora and tibiae more 

 broadly black, and base of their tarsi is more or less fuscous; abdomen nar- 

 rower. Length .25 inch. 



^a6.— Canada, (Provancher); N. H., N. Y., (Coll. Am. Ent. Soc.) 



Lophyrus insularis Cress. Proc. Ent. Soc. Phil, iv, 1.— 9 -—Robust, 

 depressed, shining; head and thorax ferruginous; antennae nearly as long as 

 thorax, black; wings tinged with fuliginous, slightly iridescent; nervures 

 black, lanceolate cell with nearly straight cross-line; legs whitish, middle of 

 femora, apical half of tibiae and most of tarsi, black; abdomen broad, ovate, 



