280 WILLIAM J. FOX. 



Stigma of wings and legs, except tibije and tarsi, black; antennae variaiile ; 

 body entirely black 9. 



9. Abdomen very sparsely pubescent ; second dorsal indistinctly punctured. . .10. 

 Abdomen with rather dense, white pubescence; second dorsal with large, 



separated punctures at rata Blake 



10. Head produced behind eyes, subtruncate behind; third subniarginal cell 



longer than high nigritus n. sp. 



Head evenly rounded behind, not pi-oduced behind eyes; third sulimarginal 

 cell higher than long roilf iiigUUS n. sp. 



11. Head black 12. 



Head concolorous with thorax 13. 



12. Upper surface of middle segment bounded by a sharp ridge. 



carinaliis n. sp. 

 Middle segment not ridged glabrella Cress. 



13. Space between hind ocelli considerably greater than that between them and 



eyes, the latter black; head narrowed behind. . . iiiieqiialis n. sp. 

 Space between hind ocelli about equal to that between iheni and eyes, the 

 latter greenish ; head but little narrowed behind. 



siibqiiadratiiK n. sp. 



14. Marginal cell at least half as long as stigma ; three submarginals 15. 



Marginal cell very small, not half as long as stigma ; two submarginals. 



perpuiictatiis Ckll. 



15. Third subniarginal cell elongate, longer than high 16. 



Third submai'ginal cell shorter than high or quadrate IT. 



16. Marginal cell fully as long as the stigma; first and second transverso-cubital 



veins not uniting above sequalis n. sp. 



Marginal cell shorter than stigma; second submargiual cell almost petiolate. 



iievadeiisis n. sp. 



17. Body entirely castaneous 18. 



Head black; abdomen fuscous beyond first segment; second subniarginal cell 



petiolate, with a long petiole; third subniarginal subquadrate. 



iii<li!>i(*ref IIS n. sp. 



18. First and second submargiual cells nearly equal in length ; space between 



hind ocelli about equal to that between them and eyes; color dark 



castaneous castaneus Cress. 



Second subniarginal cell triangular, much smaller than first, almost petiolate; 

 space between hind ocelli greater than that between them and eyes. 



triangularis n. sp. 



19. Castaneous; antennae and legs testaceous; first and second submarginals 



nearly equal in length brevis n. sp. 



Black ; antennse brownish ; second submarginal cell triangular, smaller than 

 the first perpiinctatiis Ckll. 



FEMALES. 



Dark castaneous ; two spots on second segment and one at base of sixth yellow ; 



dorsals 1-3 blackish at apex. Length 6 mm riitilaiis Blake. 



Testaceo-castaneous ; two spots on second dorsal and sixth dorsal at base and 



apex yellow; third dorsal blackish. Length 4 mm. 



biinaciilattis n. sp. 



