148 THE CANADIAN ENTOMOLOGIST. 



[2 spec, male and female, M., Cambridge, Mass.; Cayuga Lake, 

 N. Y., Comstock, June 19.] 



D. 3. Second abdominal segment without central spines. 

 E. Thorax with four bristles behind suture. 

 Spec. 9. Difters from any British species. 



[25 spec. M.,male and female. Cambridge, Mass.; Long Isl., N. 

 Y., O S., Manlius, N. Y., Aug. 26, Sept. 28, Comstock, swept from 

 grass, in woods; Fabyan's Nock., N. H., Sept., O. S. ; Illinois, 

 Allen; Brit. Amer , Scudd.; Huds. Bay Terr., Kennicott; Pacific 

 Slope, Color., Lieut. Carpenter. In Loew's coll. fr. Illinois, 

 Nebraska.] 

 Spec. 10. Not like any British species. 



[2 spec. M., male and female. Long Island, N. Y.; O.S.] 

 E. Thorax with three bristles behind suture. 

 Spec. II. Differs from all European species. 



[7 spec. M., male and female, Cambridge, Mass.; Long Island, 

 Cayuga Lake, May 25; Manlius Sept. 6, all N. Y.] 

 Spec. 12. Not like any British species. 



[3 spec. M., male and female, Manlius, N. Y.; Maryland, Oct. 20; 

 Grand Anse, Hayti, Uhler.] 

 Spec. 13. Very similar in structure to S. haematodes Meig. 

 [2 spec. M., female, Kentucky.] 



E. Thorax with only two large bristles behind suture. 

 Spec. 14. Not like any British species. 



[5 spec, male and female, Dorchester, Mass; Englewood, N. J.; 

 South Park, Colorado; Grand Anse, Hayti.] 

 Spec. 15. Not like any British species. 



[2 spec. M., male, Cuba; Distr. Columbia.] 



B. Both second and fourth longitudinal veins of wings with spines. 

 D. Second abdominal segment without spines. 



E. Thorax with four dorsal bristles behind suture. 

 Spec. 16. Differs from any British species. 



[7 spec. M., male and female. Canada; Mass.; Long Island and 

 Manlius, N. Y., end of August.] 

 E. Thorax with three dorsal bristles behind suture. 

 Spec. 17. Differs from any British species. 



[9 spec, male and female. Cambridge, Mass.; Long Island, N. Y., 

 O. S.; Grand Anse, Hayti, Uhler. The four larger specimens from 



