^ BRACHYCEEA. 



apart, but less so than in $ . First longi- 

 tudinal vein receiving others in it before 

 its tip. Thorax and scutellum with strono- 



bristles and pubescence ° Apioceridae.- 



Venation simple and reduced. Three pos- 

 terior cells. Eyes in c^ contiguous or 

 very approximate. First longitudinal vein 

 never receiving others in it. Species quite 



1 o 17- ^^^*'<^"te of bristles or pubescence Scenopinidae 



IJ. tive posterior cells. Chsetophorous species fn '^lO 



generally very pubescent also '13 ^^ 



Three or four posterior cells. Eremoch^tous 

 species, except Bombyliidje and some 



S YRPHID^ 1 i 



13. Vertex of head deeply sunken betvveen' the 

 eyes, leaving the latter very prominent. 



Eyes in cJ always separated ^silidae 



Vertex not sunken, therefore eyes not pro- 

 minent. Eyes in J contiguous or closely 

 approximate "^ Th^-n«„.:j nnrr 



l4.Tliir7 longitudinal vein •g;nera]iy ' f;rk;d. ^^^^^^^^^' P" 295. 

 Posterior cross-vein absent. Eyes in d" 

 normally contiguous in typical groups, but 

 distinctly separated in Anthkacinje ; con- 

 tiguous in both sexes in Si/stropus. Often 



nijf^ ^-^J- ''^r''' Bombyliidae, p. 173. 



iiiird longitudinal vein never forked. Pos- >P--^">. 



terior cross-vein present. Eyes in S con- 

 tiguous or approximate, except rarely; but 

 in CoNOPiDJE wide apart in both sexes. 

 JNormally not densely furry species, except 



in some Sybphid^ j^g 



15. Proboscis rigid and genicuiate". ' " Fir^"t pos- 

 terior cell closed; antenna? with apical 

 style (CONOPIN.12), or first posterior cell 

 open; antennas with dorsal arista 

 (Myopin^) Conopidae 



Proboscis soft. First posterior cell closed or 

 IP -p. ^P^"- ^i^tenua} of very various formation. 16 

 ib. first posterior cell closed. Vena spuria pre- 

 sent (sometimes very faint). Eyes in both 



sexes of normal size and nature Svrphidae 



First posterior cell open. Vena spuria absent. 

 Eyes in both sexes very large (especially 

 in PiPUNcuLiD^) ; some of the facets 

 otten enormously enlarged 17 



17. Arista dorsal, 3rd longitudinal' 'vein' 'well 



curved ; * apical section of 4th vein curved 



downwards ; hind tarsi never dilated .... Pipunculidae 

 Arista apical, 3rd vein nearly straight ; apical ^^"^^''^*- 

 section of 4th vein curved inwards. Hind 



tarsi dilated -pi,*,, • j 



18. Venation abnormal;! no ' ob;io'us"c'r;ss.'v;ia ^"^ ^p. 390. 



Nearly straight in Chalarus. 

 t Except in Opeiia, a non-Oriental genus. 



