20 H. C. EFFLATOUN. 



3 (6) Third joint of anten- 



nas not transverse ; 

 abdominal markings 

 (when present) trans- 

 verse. 



4 (5) Face moderately pro- 



duced at the upper TT , 



,, j lt IlELOPHILUSaild 



mouth-edge ,, 



& Parhelophilus. 



5 (4) Face very much pro- 



duced at the upper 



mouth edge Furinomyia. * 



G (3) Third joint of antennae 



transverse; abdominal 

 markings longitudinal Fiops. 



35 (28) Radius 4 + 5 not looped, if somewhat 

 looped (Eumerus) the turned up part 

 of Median 1 + 2 is doubly bent (MIFESTN.F). 



30 (37) Face hollowed beneath the antennae; 



outer top angle of cell R5 acute 18 Syritta. 



37 (36) Face not hollowed beneath the antenna?, 



outer top angle of cell R5 a right angle, 



or obtuse, (fig.14, PI. I and fig.3, Pi. II) 19 Eumerus. 



38 (1) Antennae porrected. 



39 (40) Radius 4 + 5 normal, without a loop or 



veinlet which may almost divide cell /pTrrjYSt )T( >Y I M V\ * 

 R5 int0 two 20 Chrysotoxum. 



40 (39) Radius 4 + 5 with a loop or veinlet al- 



most dividing the cell beneath (cell R5) 

 into two 



41 (42) Crista dorsal (MICRODONTIA). 



41 (4^ Arista doisai 21 MlcR0D0N 



,« ,„, „. ,■ , . , (CFRIOIDIN.F). 



42 (41) Style terminal ^ Cerioides. 



* 



*So far not represented in Egypt. 



