FAMILY CHLOKOPID.E THE FRIT FLIES 



343 



11. Posterior tibiae with a strong, curved ventral spur at or before the 



excavated apex (5 ) 12 



Posterior tibiae normal 15 



12. Arista flattened and strap-like (19) Ceratobarys Coquillett 



Arista of ordinary shape, practically bare 13 



13. Scutellum elongated, with flattened disc Prohippelates Malloch 



Scutellum with convex disc and of normal length 14 



14. Front with distii^ct bristles toward the orbits. .Pseudohippelates Malloch 

 Front without bristles (5) Hippelates Loew 



15. Distance between the tips of the second and third veins at least twice 



that between the first and second Siphunculina Rondani 



Distance between tips of second and third veins but little more than 

 that between the first and second 16 



16. Arista bare or quite short pubescent 20 



Arista broadened or long pubescent 17 



17. Arista appearing broadened and strap-like due to the arrangement of 



the dense pubescence Crassiseta Von Rossner 



Arista pubescent 18 



18. Scutellum with strong marginal processes (1, 27) . . . . Dactylothyrea Duda 

 Scutellum without marginal processes 19 



Chloropidse 111.-24, Ectecephala; 25, Parectephala; 26. Chloropisca ; 27, Dactylothyrea 

 curvinervis; 28, Anthracophaga sangruilenta. 



