196 THE CANADIAN ENTOMOLOGIST. 



Tenthredo, Linn, (species with black abdomen ) 

 Antennae black with apical joints white. 

 Four anterior tibise and tarsi testaceous. 



Collar yellow antennatd, Kirby. 



Collar black * .nigricollis, Kirby. 



Four anterior tibiae and tarsi black and white . . . .grandis, Nort. 

 Antenna; wholly black. 



Wings violaceous, paler at apex nimbipennis, Nort. 



Wings fuliginous, darker at apex fumipcnnis, Nort. 



Wings hyaline or subhyaline. 



Legs black, varied with white or yellow 



11 (12) Head above antennae more or less yellow iobata, Nort. 



12 (11) Head above antennas black. 



13 (16) Posterior tibiae black. 



14 (15) Tegulae and edges of collar straw-white. . . .Jlavomarginis, Nort. 



15 (14) Tegulae and collar black melanosoma, n. sp, 



16 (17) Posterior tibiae with white annulus, wings \\y2i\\i\Q.decorata,Vvov. 



17 (13) Posterior tibiae yellow except tip, wings yellow- 



ish hyaline cinctitibiis, Nort. 



18 (10) Legs rufous, varied more or less with black oryellow. 



ig (20) Pectus rufous rufopectus, Nort. 



20 (19) Pectus black. 



21 (22) Coxae red rufipes, Say. 



22 (23) Coxae waxen yellow zetes, Kirby. 



23 (21) Coxae black, in whole or in part. 



24 (25) Scutellum yellow cogitaus, Prov. 



25 (24) Scutellum black. 



26 (35) Labrum and clypeus (in part) yellow. 



27 (28) Femora black, except tip of anterior concessa, Nort. 



28 (29) Femora black at base only atrocceruiea, Prov. 



29 (27) Femora largely red or testaceous. 



30 (31) Posterior legs black, except apical joint of 



tarsi uniformis, Kirby. 



31 (32) Posterior tarsi and tip of tibiae black or 



piceous erythromera, Prov. 



32 (30) Legs rufous, except coxae. 



33 (34) Tegulffi and collar black jiigrisoma, n. sp. 



34 (33) Tegul^ and edges of collar rufous ruficollis, n. sp. 



35 (26) Labrum and clypeus black nigricostata, Prov. 



