374 EMPIDJE, 



or the 2iid 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 

 aiisent ; 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 bro^^•n shades of 

 colour. 



Tahle 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 



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



absent Tachypeza, Mg., 



Lower branch of 5tli vein, also anal vein, 

 entirely absent 3. 



3. Legs short and robust ; abdomen short and 



broad ; 3rd autennal joint short, ovate. . . . Dkai'ETIs, 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 («ec Scop. 1763J, Precis Caract. Gen. Ins. xiv, p. 158 



(1796). 

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

 Platypalpus, Macqnart, Soc. Sci. Lille, p. 92 (1827). 

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



Gexotypb, Tachi/dromia connexa, Mg. (as cimicoides, F.) 

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



Mead 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 arisla, 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 doi-so- 

 central and aci'ostichal rows ; one to three notopleural bristles 

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

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

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

 large, knob-like, hiding 8th segment. Ler/s : anterior pairs 



