260 ENTOMOLOGICAL SOCIETY 



11. Front femora not noticeably thickened 12 



Front femora considerably thickened, third antennal joint oval, the 



arista elongated Phyllodromia Zett. 



12. Third joint of antennae elongated and rather narrow, at least twice as 



long as wide, usually longer than the thickened style 15 



Third joint oval, the arista elongated and bristle-like, femora not 



thickened 13 



Third joint short and wide, at most one and three-fourths times as long 



as wide, the apical portion sometimes prolonged styliform, 



Anthalia Zett. 



13. Proboscis much shorter than height of head 14 



Proboscis as long as height of head, axillary angle of wings only 



slightly projecting Heleodromia Hal. 



14. Antenna as long as the arista, axillary angle distinctly projecting, 



Parathalassius Mik. 



Antennae only half as long as the arista, axillary angle only slightly 

 projecting Oreothalia Mel. 



15. Axillary angle strongly projecting 16 



Axillary angle not projecting, anal cell much shorter than the second 



basal, its lower outer angle rounded, the crossvein at its apex onl^v 

 slightly oblique, proboscis slightly longer than height of head, 

 directed downward (type, Synamphotera bicolorl^o&w, 



Boreodromia, n. gen. 



16. Height of head less than length of proboscis 19 



Heightof head greater than length of proboscis 17 



17. Hind femora not thickened 18 



Hind femora considerably thickened, spinose on the under side, 



CEdalea Meig. 



18. Stigma contiguous to apex of second vein, sixth vein prolonged to the 



wing-margin Trichina Meig. 



Stigma contiguous to apex of first vein, or obsolete; sixth vein oblit 

 erated beyond apex of anal cell Microphorus Macq. 



19. Direction of proboscis forward 20 



Direction of proboscis downward 21 



20. Base of discal cell pointed, stigma at apex of first vein, arista minute, 



Anthepiscopus Beck. 



Base of discal cell pointed, arista rather long Holoclera Schin. 



Base of discal cell truncated, stigma at apex of second vein, 



Eufhyneura Macq. 



21. Wings of female (male unknown) unusually broad, three-fourths as 



broad as long, subtruncated at the apex Platyptera Meig. 



Wings not unusually broad, the apex rounded 22 



22. Face bare Macrostomus Wied. 



Face hairy Neocota Coq. 



23. Fourth vein forked, the base of the upper branch sometimes obliter 



ated 28 



Fourth vein simple 24 



