374 EMPIDJE. 



or the 2nd the longer ; anal cell normally absent, when present 

 shorter than basal cells and anal vein weak, usually accompanied 

 by the character of incrassated middle femora ; anal vein weak or 

 absent ; squamae absent. 



This subfamily is distinguished by the (normal) absence of the 

 anal vein, or, when it is present, by the thickened middle femora. 

 Some genera with shortened abdomens and thick-set bodies are 

 included here. Many species are of yellow or brown shades of 

 colour. 



Table of Genera. 

 '1. Anal cell absent 2. 



Anal cell normally present, sometimes feeble [p. 374. 



or incomplete TACHYDROMIA, Mg., 



2. A portion of the lower branch of the 5th. 



longitudinal vein present; anal (6th) vein [p. 378. 



absent TACHYPKZA, Mg., % 



Lower branch of 5th vein, also anal vein, 

 entirely absent 3. 



3. Legs short and robust; abdomen short and 



broad ; 3rd antennal joint short, ovate DRAPETIS, Mg., p. 380. 



Legs slender ; abdomen more elongate, rela- 

 tively less broad; 3rd antennal joint [p. 384. 



elongate, conical ELAPHROPEZA, Macq., 



Genus TACHYDROMIA, Mg. 



Tachydromia, Meigen, Illig. Mag. ii, p. 269 (1803). 



Sicus, Latreille (nee Scop. 1763), Precis Caract. Gen. Ins. xiv, p. 158 



(1796). 



Phoroxypha, Rondani, Dipt. Ital. Prod, i, p. 146 (1856). 

 Platypalptis, Macquart, Soc. Sci. Lille, p. 92 (1827). 

 Brevios, Brunetti, Rec. Ind. Mus. ix, p. 22 (1913). 



GENOTYPE, TacJiydromia connexa, Mg. (as cimicoides, F.) 

 (Europe) ; by designation of Coquillett (1903). 



Head rounded, as broad as thorax or nearly so, a little higher 

 than broad ; eyes rather elongate, separated in both sexes by 

 a rather narrow frons, subcontiguous below antennae, facets 

 of uniform size. Proboscis short, vertical ; palpi 1-jointed, of 

 variable size. Antennae inserted about middle of head, 3-jointed ; 

 1st very short, subcylindrical ; 2nd somewhat rounded, bristly 

 towards tip ; 3rd considerably elongate, sometimes more than 

 twice as long as first two together, approximately conical, slightly 

 compressed at about the middle, with very long, microscopically 

 pubescent arista, which possesses a minute basal joint. Thorax 

 rectangular, moderately arched. No definite discal bristles, but 

 the hairs on the disc may be more or less arranged into dorso- 

 central and acrostichal rows ; one to three notopleural bristles 

 and one postalar ; generally a humeral, sometimes a post-humeral 

 bristle ; two or four scutellar bristles ; rnetapleura bare. Abdomen 

 in male cylindrical, tip bluntly pointed in female ; male genitalia 

 large, knob-like, hiding 8th segment. Legs: anterior pairs 



