BY ARTHUR WHITE. 229 



Fig. 43. Wing of Hilaropus peregrinus 



Male. Face grey. Front with lower third grey, upper 

 two-thirds black. Proboscis a little longer than the height 

 of head. Palpi a little less than half the length of the 

 proboscis, light brown, with long, pale yellow hairs. An- 

 tenna brownish black, about as long as the head, the first 

 joint twice the length of the second; the third thickened, 

 about twice as long as the first two together, and termin- 

 ated by a short style, which is about one-quarter its length. 

 Thorax velvet-black, bearing dense black pubescence; onl}' 

 the posterior lateral bristles well-defined ; scutellum vel- 

 vet-black, with a fringe of numerous long, weak, black 

 marginal bristles. Metapleural bristles wanting. Ab- 

 domen somewhat conical; first segment black, remaining 

 segments covered with pale blue tomentum, all segments 

 bearing lateral tufts of black bristlesi; genitalia black, 

 large, and rising Avell above the level of the abdomen. 

 Legs black, with the knees narrowly orange; front tarsi 

 with the first joint much dilated, and bearing a fringe 

 of hairs outwardly ; the first joints of the middle and 

 posterior tarsi are alsoi somewhat swollen ; anterior and 

 middle tibiae clothed with long, black hairs ; posterior 

 tibiae with very long yellow and black hairs; posterior 

 femora with ver}'- long yeilow hairs below, and black hairs 

 above. Wings rather short, tinged with brown, and with 

 a brown stigma; mediastinal vein nearly straight, and 

 not reaching the costa; cubital fork broad, the upper 

 branch much shorter than the lower; discal cell with 

 three issuing veinlets, whigh are all complete; wing- veins 

 dark brown and strongly marked ; halteres light brownish- 

 yellow. 



Female differs so much from the male that it might 

 v/ell be mistaken for a distinct species. The front is en- 

 tirely grey. Thorax pale gre}^, the centre of the dorsum 

 flushed with red, and with four very distinct black stripes, 

 the two median ones narrow and entire, but not reaching 

 to the posterior margin, the two lateral ones broad, and 

 interi'upted in the middle ; scutellum pale grey, with mar- 

 ginal bristles as in the male. Abdomen black, with faint 

 traces laterally and posteriorly of the pale blue tomen- 



