MICROPEZID^E. 113 



6. Wings with a blackish spot at the tip; antennas reaching nearly to the 



oral margin. MYCETAUI.US Loew. 



Wings wholly hyaline. ......... 7 



7. Proboscis long and slender, the labella folded back. MADIZA Fallen. 

 Proboscis short, the labella not folded backward; cross-veins of the 



wings approximated PIOPHILA Fallen. 



41. MICROPEZIDJS. 



Front broad, bristly on the upper part. Face retreating in 

 profile, sometimes very much so. Antennae short or elongate, 

 porrect. Abdomen elongate ; genitalia in the male sometimes 

 very large and complicated. Wings large ; auxiliary vein 

 present or not ; anal cell always present ; second basal cell 

 closed, except in Micropeza. Legs long ; tibiae without preapi- 

 cal bristle. 



The larvae and their habits of this group are unknown. 

 The flies are usually of considerable size and slender or very 

 slender, with very long legs. 



TABLE OF GENERA. 



1. Third and fourth veins parallel. . . . . TETANURA Fallen. 

 Third and fourth veins not parallel, the first posterior cell narrowed or 



closed. . . . . . ,.'.'. . - . . . 2 



2. Third antennal joint more or less elongated 3 



Third antennal joint rounded. . . . . . 4 



3. Antennal arista apical and bare (West Indies, Central and S. America). 



NERIUS Schiner. 

 Antennal arista dorsal and plumose (Central and South America). 



CARDIACEPHALA Mac-quart. 



4. Auxiliary vein wanting; second basal cell and the discal cell united. 



MICROPEZA Meigen. 

 Auxiliary vein present ; second basal cell complete. ... 5 



5. Ultimate and penultimate sections of the fourth vein of nearly equal 



length ; anal cell large. . . . . . CALOBATA Meigen. 



Ultimate section of the fourth vein twice the length of the penultimate 



section; anal cell small TANYPKZA Fallen. 



14 



