H YMENOP TERA A CULEA TA . 



or with a single flavous spot in the 

 centre. 



(8) 7. Abdomen with lateral spots, antennre 



dark solidaginis. 



(7) 8. Abdomen with continuous bands, 



autenniB bright fulvous . . . rocATA. 



(6) 9. Scutellum more or less raised, generally 

 bituberculate, the tubercles rediliah or 

 flavous, or in m;iny of the males and 

 a few females entirely immaculate. 

 (19) 10. Markings of second and following ab- 

 dominal segments black and yellow, 

 sharply defined, rarely in some varie- 

 ties of alternuta and lineola varied 

 with brown. 



(12) 11. Head somewhat rostrate, viewed side- 



ways much longer in front of the eyes 



than behind them .... sex-fasciata. 



(11) 12. Head not rostrate, viewed sideways 

 scarcely or not longer in front of the 

 eyes than behind them. 



(l-l) 13. Abdominal yellow bands, except the first, 

 entire, posterior tibise of the $ armed 

 at the exterior apex with two short, 

 thick, curved spines .... succincta, 



(13) 14. One or more of the abdominal bands 



besides the first interrupted, posterior 

 tibia3 of the $ unarmed at the apex, or 

 with fine spines. 



(16) 15. (J, antenna3 short, almost entirely black, 



second and third joints of the flagel- 

 lum subequal, scutellum with large 

 conspicuous yellow spots ; ? , antennaa 

 dark, posterior tibia3 unarmed . . jaCOB-E^. 



(15) 16. cJ, antennae long, only dark at the base 

 above, second joint of flagellnm much 

 shorter than third, spots of the scu- 

 tellum, when present, small ; $ , 

 antennae pale, posterior tibice spinose 

 at the apex. 



(18) 17. Tegulai flavous; second joint of the 

 flagellum in the (^, looked at from 

 beneath, not half so long as the third, 

 second joint io the J much shorter 

 than the fourth ..... LINEOLA. 



(17) 18. Tegute almost always ferruginous ; 



second joint of flagellum in the ^ 

 more than half the length of the third ; 

 second in the ? almost as long as 



the fourth alteknata. 



(10) 19. Abdomen brown, or brown and yellow, or 

 if with black markings then with the 

 black margined with brown. 



