TACHYPEZA. 379 



little enlarged in both sexes ; ocellar bristles absent ; antennal 

 arista unjointed ; proboscis shorter than height of head. Scu- 

 tellinn with two bristles. Legs long and slender, the fore pair 

 the shortest, the hind pair the longest ; fore coxse slightly 

 elongated ; fore femora thickened in both sexes, the middle 

 femora slightly thickened ; fore tibiae sometimes somewhat 

 thickened, more so in the male; tarsi long. Wings with vena- 

 tion as in Tetchy dromia, except that the anal cell is absent ; lower 

 branch of 5th vein present. 



Range, Europe, India, Siberia, North America, Jamaica. 



Life-history unknown. 



The flies are found on tree-trunks, and running swiftly over 

 low plants and bushes. They are raptorial and are said to be loth 

 to fly. 



Only two Indian species are known, distinguished as follows : — 



Antennae all black ; length If mm palliditibice, Brun. 



Antennas with basal joints pale ; length "2i mm. . . iucisa, Brun. 



312. Tachypeza palliditibias, Brun. 



Platypalpus palliditibice, Brunetti, Rec. Ind. Mus. ix, p. 41 (1918). 



S . Head blackish ; irons and occiput with microscopic whitish 

 hairs, some also on underside of head ; antennae black ; proboscis 

 mainly black, not so long as height of head ; palpi nearly white, 

 half as long as the proboscis. Thorax wholly blackish, with 

 microscopic pale yellowish hairs ; seutellum, metanotum, and sides 

 all similar ; bristles distributed as in the three previous species. 

 Abdomen black, with sparse pale hairs, tip stump-like ; genitalia 

 of moderate size, rounded exteriorly, mainly withdrawn ; venter 

 like upper side. Leys yellowish ; femora mainly blackish, as are 

 the tarsi-tips. Wings clear ; halteres: stem black, clubs whitish. 



Length, 1| mm. 



Described from one <5 in the Indian Museum from Simla, 

 11. v. 1908 (Annandale). 



313. Tachypeza incisa, Brun. 



Platypalpus incisus, Brunetti, Rec. Ind. Mus. ix, p. 41 (1913). 



$ . Head blackish, occiput with short whitish-grey hairs ; frons 

 moderately narrow, widened a little in the middle, at which place 

 are situated the three limpid ocelli in the form of a triangle. 

 Proboscis brownish yellow, half the height of the head ; palpi pale 

 yellow, with a few black bristles. Antennae large ; 2nd joint 

 yellowish, with a row of short subapical bristles ; 3rd dark brown, 

 with minute pale pubescence, squarish or nearly V-shaped at tip, 

 with a long thick arista from the upper angle at the tip. Thorax 

 wholly shining black, bare, except for microscopic yellow hairs 

 and two or three notopleural bristles ; seutellum with two apical 



