THE CANADIAN ENTOMOLOGIST. 325 



posterior tibia with a band at apex, and posterior tarsus except base of 

 metatarsus, brown ; wings hyaline, veins and stigma black, costa at 

 immediate base white, first submarginal cross-vein distinct. Length, 7 mm. 

 Habitat — McLean, N. Y. 1 S 30th May, 1890. 



This species is readily separated from obsoleta by the crossing sinus 

 on the front, the colour of the femora, and the larger size. The species 

 is dedicated to Mr. Edward Norton, the well-known student of American 



Tenthredinidae. 



Strongvlogaster, Dahlb. 



1. Lanceolate cell with a cross-line 2. 



Lanceolate without a cross-line 15. 



2. Under wings with incomplete outer cells; if complete, no 



cross-vein in cell in front of lanceolate cell ; ... 3. 



Under wings with complete outer cells, and with a cross-vein 

 in cell in front of lanceolate cell pingiiis, Nort. 



3. Antennse in part pale 4. 



Antennitt wholly black 9. 



4. Antenna pale at apex 5. 



Antennae pale at base efiicera, Say. 



5. Head testaceous 6. 



Head black 7. 



6. Median lobe of mesothorax black, margined with white 



t?iellosus, Say. 



Median lobe of mesothorax rufous terminalis, Say. 



7. Eyes margined before and behind with black apicalis, Say. 



. Eyes margined with white or rufous in part 8, 



8. Eyes margined before and behind with white. .pallidicornis,'^or\.. 

 Eyes margined behind with rufous, black in front . . rufocuhts, n. sp. 



9. Lanceolate cell of posterior wings not attaining the margin, an 



appendiculate vein at apex abrwrmis, Prov. 



Lanceolate cell attaining the margin, not with an appendicu- 

 late vein at apex 10. 



10. Eyes partly margined with white fidus, Cress. 



Eyes wholly margined with black 11. 



1 1. All the coxae and trochanters while 12. 



Some of the coxte and trochanters black or in part black 13. 



12. Scutellum black , pallicoxus, Prpv. 



Scutellum white proximus, Prov. 



