XXXVII. Family ORTALIDID^. 



Fig. 107. Atilineura, sp. Brazil. Enlarged. 



Rather small to moderately large flies. Front broad in 

 both sexes, never with lower fronto-orbital bristles. Vi- 

 brissas wanting. Clypeus distinct, usually well devel- 

 oped; proboscis more or less stout; palpi broad, seldom 

 narrow. Abdomen with five segments in the male, six 

 in the female, the first two in both sexes more or less 

 coalescent; male with a rolled up, long penis; female 

 with a three-jointed, horny ovipositor. Legs usually 

 stout and short, never very slender. Venation of wings 

 complete; auxiliary vein usually completely separated 



271 



