224 THE CANADIAN ENTOMOLOGIST. 



California species 9 



Tibiae yellow, cross-veins of wings bordered with brown ; Eastern 



species variegata, Loew. 



9. Third joint of antennae scarcely longer than broad, pile in front of • 



the halteres, and on the abdomen and legs, wholly 



white baccata, n. sp. 



Third joint of antennae twice as long as broad, pile in front of the 



halteres, and on the abdomen and legs, largely black.pavida, n. sp. 



10. Scutellum black 11 



Scutellum orange-red, wings beyond the middle marked with two 



dark gray cross-bands scutellaris, Loew. 



1 1. Abdomen black 12 



Abdomen largely orange-red, wings beyond the middle marked 



with two dark-gray cross-bands rufiventris, Loew. 



12. Wings destitute of dark-gray cross-bands 13 



Wings beyond the middle marked with two dark-gray cross-bands, 



much abbreviated in the male ; two widely separated thoracic 

 vittae, and the apex of the scutellum, deep velvet 

 black pictipennis, Wied. 



13. Front wholly opaque and covered with pollen, tibiae largely 



yellow 14 



Front partly shinine 16 



14. M nob of halteres, proboscis and palpi, yellow 15 



Knub of halteres, proboscis, palpi and hypopygiuhi oi the nude, 



black ; eastern species meianoprocta, Loew. 



15. Antennae yellow ; California species warcida, n. sp. 



Antennae black ; Jamaica species obscura, n. sp. 



16. Tibiae largely or wholly yellow 17 



Tibiae and marginal cell wholly black ; California species. rtw/rt/Zs, Loew. 



17. Knob of halteres blackish 19 



Knob of halteres and hypopygium of male yellow, front shining 



except on its lower corners 18 



18. First joint of antennae three-fourths as long as the third, wings 



hyaline, the veins never clouded with brown A/dric/u'i, n. sp. 



1 9. Femora blackish 21 



Femora yellow 20 



20. Pollinose spots on lower corners of the front contiguous ; wings 



nearly hyaline notata, Wied. 



