FAMILY helo:myzid.e 379 



KEY TO GENERA 



1. Propleural bristle absent; anal vein not reaching wing margin 2 



Propleural bristle present; anal vein reaching wing margin 4 



2. Humeral bristle absent 3 



Humeral bristle present (12) Allophyla Lcew 



3. Five pairs of dorsocentrals (15) Suillia Desvoidy 



One pair of dorsocentrals (14) Porsenus Darlington 



4. Middle tibiae with several bristles on dorsal surface 5 



Middle tibae with only the preapical bi'istle dorsally (] 



5. Two pairs of fronto-orbitals; one pair of presutural dorsocentrals; 



wings usually mutilated (4, 16) Criddleria Curran 



One pair of fronto-orbitals; no presuturals; wings entire (10, 13). 



*ai!cothea Haliday 



6. Pteropleura in part bristly or hairy 7 



Pteropleui'a bare 9 



7. Mesopleura hairy 8 



Mesopleura bare (8, 11 ) Pseudoleria Garrett 



8. Prosternum with one pair of bristles Scoliocentra Lcew 



Prosternum with several bristles Trichochlamys Czerny 



9. Humeral bristle present 10 



Humeral bristle absent; 3 pairs of scutellars Orbellia Desvoidy 



10. Without prosternal bristles 13 



With one or more pairs of prosternals 11 



11. With one pair of prosternals 12 



With two or more pairs of prosternals (2) Helomyza Fallen 



12. Anterior orbital bristle as long as the posterior Anypotacta Czerny 



Anterior orbital bristle much shorter than the posterior (9). 



t Amcebaleria Garrett 



13. Middle tibiae with several apical bristles on ventral surface 1-5 



Middle tibiae with only one apical bristle on ventral surface 14 



14. First vein ending opposite or before the small crossvein (1, 6). 



Tephrochlamys Lcew 

 First vein elongate, ending distinctly beyond the anterior crossvein. 



Heteromyza Fallen 



15. Second vein joining the costa far beyond the tip of the first IG 



Second vein joining the costa only a little beyond the tip of the first. 



Lutomyia Aldrich 



16. Third antennal segment more or less angulate dorsally; middle femora 



with several partial rows of bristles anteriorly; middle tarsi with 



spines at apices of segments 17 



Third antennal segment evenly rounded; otherwise different 18 



• Czerny, 192S, Konowia, vii, p. 52. 

 t Czerny, 1927, Konowia, vi, p. 38. 



