FAMILY RHAGIOXID.E THE SNIPE FLIES 159 



KEY TO GENERA 



Anterior tibiae without terminal spur 4 



Anterior tibiae with one or two terminal spurs 2 



Antenna? with a long terminal arista or style which is very much 



longer than the antenna proper (1); alula present or absent.... 3 

 Antennae with a short, thick terminal style; alula present. 



Bolbomyia Lcew 



Alula present; scutellum haired; males holoptic (7, 14) (Triptotricha 



Lcew) Dialysis Walker 



Alula absent; scutellum bare; males dichoptic (1, 3) (Pheneus Walker). 



Vermileo Macquart 



Discal cell present; five posterior cells 5 



Discal cell absent; four posterior cells (11) Hilarimorpha Schiner 



_ Rhagionidas II. — 8. Atherix variegatus ; 9,- Ptiolina majuscula; 10, Rhagrio incisus; 11, 

 Hilarimorpha; 12, Symphoromyia; 18, Atherix variegtaus; 14, Dialysis elongata; 15, Chrysopilus. 



