1913] Alexander — New Neotropical Antochini 41 



M3 fused with Cu to the tip, obliterating cell M t ; basal deflection 

 of Cui retreated far toward the base of the wing. (N. and S. 



Amer.) Diotrcpha Osten Sacken 



9. Ri very short, ending before the middle of the wing, the sector orig- 

 inating near its tip. (Australasia to Africa) Styringomyia Loew. 



Ri ending beyond the middle of the length of the wing, the sector 



remote from the tip 10 



10. Radial cross- vein present 11 



Radial cross-vein absent 12 



11. Rs very long, straight, but diverging from Rr, basal deflection of 



R4+5 twice as long as cross-vein r-m; basal deflection of Cui before 

 the fork of M; radial cross-vein usually in a direct line with r-m ; 

 anal angle of the wing very prominent. (Eur.; N. Amer.) 



Antocha Osten Sacken 

 Rs shorter, more arcuated; basal deflection of R4 +s about as long as 

 r-m; basal deflection of Cui at, or beyond, the fork of M; radial 

 cross- vein usually slightly distad of the level of r-m ; anal angle of 

 the wing feeble. (N. and S. Am.; Asia; Australia) 



Teucholabis Osten Sacken 



12. Rs short, not much more than twice as long as the deflection of R^s; cell 



Ri broader at base than at tip (Atarba) or else Rs gently arcuated 

 and the veins issuing from cell 1st M 2 twice as long as that cell 



(Dicranoptycha) 13 



Rs long, and very straight, close to Ri leaving cell Ri extremely 

 narrow; deflection of R< +s very short, almost perpendicular to Rs 

 at its origin; cross-vein m present in New World species. (Eur.; 

 N. Amer.) Elliptcra Schiner. 



13. Rs originating opposite to the end of Sc; cell 1st M 2 short, almost 



as broad as long. (Eastern U. S.) Atarba Osten Sacken 



Rs originating far before the end of Sc; cell 1st M2 elongate, 

 twice as long as broad. (Eur.; N. Am.; Africa; East Ind.) 



Dicranoptycha Osten Sacken 



Ellipteroides Becker 2 , erected in 1907 for the new species, piceus, 

 is almost certainly Eriopterine. The presence of a cell R2 is a tribal 

 character, not generic as considered by Becker. But one genus, 

 Paratropeza Schin., occurs in the Antochine series that possesses 

 cell R 2 , but this genus, in all other respects is a true member of that 

 series. Ellipteroides is not, but seems, rather, to be a generaliz< <1 

 form allied to Gonomyia. It is not at all related to Elliptera 

 Schin., as Becker states, and this reference was probably made 

 chiefly on the lack of cell 1st M 2 (discal), a very unimportant 



1 Ellipteroides, Becker is omitted; see discussion at the end of this key. 



2 Becker, T. Die Ergebnisse meiner Dipterologischen Friihjahr-rei.se nach Algicr und 

 Tunis 1906. (Zeitschr. fur Syst. Hymenopt. und Dipterol.; vol. 7, p. 239; figure) (1907). 



