268 Journal New York Entomological Society. [Voi. vii. 



Front bearing three pairs of yellowish spines between the rows of frontal bris- 

 tles, scutellum with three pairs of similar spines Paracantha 



9. With, at most, four bristles on the scutellum 10 



With six bristles on the scutellum, front very broad Xenochaeta 



10. Wings unusually short and broad, black, thickly dotted with white or yellow 



ish, the apex partly or wholly hyaline, the margins destitute of large hyaline 

 indentations Eutreta 



Wings unusually naiTow, yellowish, thickly covered with small brown spots, 

 the disk destitute of pure hyaline spots, the margins partly brown and desti 

 tute of large hyaline indentations Icterica 



Wings neither unusually broad nor narrow, not marked like the above 11 



11. The wings are hyaline except sometimes in the stigma Neaspilota 



The wings are almost or wholly hyaline except a brownish spot toward the 



apex which sends out several rays Urellia 



The wings not marked like these 12 



12. Brown on disk of wings containing many hyaline or yellowish dots or spots 13 



Brown, containing only a few hyaline spots, the margins with several large 



hyaline indentations 16 



Brown of wings in the form of bands or spots which do not contain hyaline or 

 yellowish dots or spots 18 



13. Front longer than broad, not unusually broad 15 



Fron t broader than long 1 4 



14. Margins of wings with large hyaline indentations usually composed of several 



dots Eurosta 



Margins destitute of such indentations Acidogona 



15. Apex of first posterior cell broadly hyaline, at most with narrow brown border 



to the two veins Euaresta 



Apex of this cell brown, or only a small portion hyaline Tephritis 



16. Face retreating at the oral margin ; 17 



Face not retreating, usually produced forward Aciura 



17. Cheeks posteriorly more than one-fourth as wide as the eye-height, under side 



of head strongly convex Straussia 



Cheeks less than one-sixth as m ide as the eye-height, under side of the head 

 horizon tal Acidia 



18. Third vein bristly at least almost to the small crossvein 19 



Third vein at most bristly at its extreme base Trypeta 



19. Crossbands on disk of wings very oblique Plagiotoma 



Crossbands almost or quite perpendicular Epochra 



