166 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 75 



*9. Anterior wing heavily clouded at first cubital cell viduata. 



Anterior wing without heavily clouded area 10. 



10. Fasciae on tergites attenuated medially; that on sixth reduced to widely 



separated spots quadrifasciata. 



Fasciae not attenuated medially ; that on sixth tergite not reduced to 

 widely separated spots 11. 



11. Fascia on posterior border of scutellum continuous, or if interrupted, the 



lateral spots show a tendency to extend along the posterior border ; genital 



stipes as in Figure 221 annulata. 



Fascia on anterior border of scutellum continuous, or if interrupted, the 

 lateral spots show a tendency to extend along tlie anterior border ; genital 

 stipes otherwise 12. 



12. Discal marks on scutum narrow longitudinal lines ; sides of thorax profusely 



yellow; genital stipes as in Figure 45 variegata. 



Discal marks on scutum oval spots; yellow on side limited to spot on meso- 

 pleura ; stipes otherwise spinosa. 



13. Anterior wings heavily clouded at first cubital cell 14. 



Anterior wings without clouded area; infumation, if present, diffused 15. 



14. Dorsum of propodeum unmarked ; genital stipes as in Figure 48 gracilis. 



Dorsum of propodeum marked with yellow fascia more or less complete ; 



genital stipes as in Figure 47 viduata. 



15. Flagellum black ; fascia on sixth tergite wanting or more widely interrupted 



than preceding fasciae 16. 



Flagellum not wholly black ; fascia on sixth tergite always developed and 

 scarcely more widely interrupted than the other fasciae 19. 



16. Sternites without maculations IS. 



Sternites 2-4 with lateral maculations 17. 



17. Discal spots on scutum ; fascia on metanotum ; fasciae on tergites, orange 



yellow spinosa. 



Discal spots on scutum lacking ; metanotum without fascia ; fasciae on ter- 

 gites creamy white quadrifasciata. 



18. Tergites 1-5 maculated ; wings slightly but uniformly infumated. 



quinquemaculata. 

 Tergites 1^ maculated; wings hyaline pullata. 



19. Scape, first two joints of flagellum, and legs ferruginous; genital stipes as 



in Figure 46 insidiatrix. 



Scape and first two joints of flagellum not entirely ferruginous ; legs black 

 and yellow, or black and ferruginous; genital stripes otherwise 20. 



20. Metanotum without fascia ; fasciae on tergites narrow ; ultimate tergite 



narrowed and bluntly pointed at the apex tristis. 



Fascia on metanotum ; fasciae on tergites relatively broad ; ultimate tergite 

 otherwise 21. 



21. Legs black and ferruginous ; maculations deep yellow, frequently with dashea 



of ferruginous capnoptera. 



Legs black and yellow; markings pale creamy yellow with no trace of fer- 

 ruginous mesillensis. 



22. Second sternite bearing pair of small processes ; sixth tergite as in Figure 41. 



bradleyi. 

 Second sternite without process; sixth tergite otherwise 23. 



23. Posterior coxa with tooth on inner distal margin 24. 



Posterior coxa without tooth 25. 



