325 



or <it an aufjle of about 45'^ to hind 



margin of Aviiig ; anal cell with either 



anterior or posterior margin the 



longer, its apical end truncate or 



pointed ; proboscis generally shorter 



than or as long as height of head, 



sometimes longer; ord veiu simple 



or forked ; thorax humped or not . . 4. 

 Proboscis as long as or longer than 



head,* projecting downwards ; lower 



branch of otli vein parallel to hind 



margin of wing, so that anterior 



margin of anal cell is always the 



longer; antennse comparatively elon- 

 gate, generally with 2-jointed style ; 



3rd vein simple or forked Empin^, p. 344. 



Proboscis generally quite short ; it as 



long as head or longer, directed 



straight or obliquely forwards, also 



/5th vein meeting anal vein at an 



angle of about 45°, also antennje and 



style very short. Antenme vari- 

 able ; lower branch of 5th vein 



meeting anal vein parallel with, 



perpendicular to, or at an angle of 



45° to hind margin of wing ; 3rd vein 



simple OcYDROMiix^, p. 362. 



Subfamily HYBOTINtE. 



Eyes contiguous in both sexes ; proboscis varying from shorter 

 than, to a bttle longer tban the bead; palpi of one joint; an- 

 tennae 3-jointed, with a terminal arista.* Thorax very humped. 

 Wings with axillary lobe well developed ; 3rd longitudinal vein 

 simple, 4tli simple or forked ; three or four posterior cells ; discal 

 cell generally present ; t 2nd basal cell equal to or longer than 1st ; 

 anal cell longer or shorter than 2nd basal ; anal vein reaching 

 margin of wing ; lower branch of 5th vein bent down rather 

 suddenly, at an obvious obtuse angle, meeting anal vein approxi- 

 mately perpendicularly to hind margin of wing, making posterior 

 side of anal cell always the longer, and its apical end pointed. 



The characters by which this subfamily may be most easily 

 recognised are the elongated anal cell, pointed at tip, in conjunction 

 with the obtusely bent lower branch of the 5th vein ; also by the 

 very humped thorax. They are strongly built Empids and of 

 comparatively lai'ge size. 



* Triclinpcza is almost an Pxception, the proboscis beir.g barely as loncj as 

 ilie h<>ad. 



t Micromania, Zett., a European germs, lias a two-jointed ttyle to the ord 

 aJitennal joint and the discal cell absent. 



