EMPIS. 95 



19. nigritarsis, Mg. zw. iii. 32. 31 (1822); Mq.; Ct. Nigra, 

 alls limpidis, halteribus flavo-albis, abdominis basi utrinque albo-piloso, 

 pedibus fulvis albo-hirtis, coxis posterioribus genubus posticis tarsis et 

 tibiis apice nigris. Long. 2 ; alar. 4 lin. 



Black, shining. Head and thorax thinly clothed with hairs, grey be- 

 neath. Lancets ferruginous. First and second joints of the antennae 

 clothed with a few short hairs ; third lanceolate, much more than twice 

 the length of the first and of the second ; fifth about one-fourth of the 

 length of the third. Wings colourless; stigma brown; veins black, 

 tawny towards the base. Halteres yellowish-white. Abdomen clothed 

 with long whitish hairs on each side towards the base. Legs tawny, 

 thinly clothed with long whitish hairs, which are most prevalent on the 

 tibiae ; posterior coxa, hind knees, tarsi, and tips of the tibiae black ; 

 hind tarsi towards the base and tips of the hind tibiaa dilated, especially 

 in the male. 



Not rare. (E.) 



20. stercorea, L. fn. 1899 (1761) ; Shr. ; Fb. ; LI. ; Fin. ; Mg. ; 

 Ct. Lutea, capite cinereo, antennis nigris, thorace nigro-univittato, 

 alis limpidis, halteribus flavis, abdomine nigro-trivittato, pedibus flavis, 

 tarsis ferrugineis. Long. 3^ ; alar. 9 lin. 



Luteous, shining, clothed with a few black hairs and bristles. Head 

 cinereous. Proboscis luteous, black towards the tip. Antenna black ; 

 first and second joints clothed with black hairs; first long, linear; 

 second very short ; third tapering much longer than the first ; fifth 

 about half the length of the third. Thorax with a black linear stripe. 

 Wings colourless ; stigma pale brown, very narrow ; veins black, tawny 

 at the base. Halteres yellow. Abdomen with 3 black stripes. Legs 

 yellow, long, slender ; tarsi ferruginous. 



Generally distributed. (E. S. I.) 



21. ignota, Mg. zw. vi. 338 (1830) ; Mq. ; Ztt. ; Vl.punctata, 

 Fin. ; Mg. dorsalis ? Ct. Lutea, capite supra cinereo, antennis nigris, 

 thorace cinereo fusco-trivittato, alis subcinereis, halteribus flavis, abdo- 

 mine nigro-trivittato, pedibus luteis, tarsis nigris. Long. 2f ; alar. 

 7 lin. 



Luteous, clothed with a few black hairs and bristles. Head grey 

 above. Lancets luteous, with black tips. Palpi yellow. Antenna? 

 black ; first and second joints clothed with short black hairs. Disc of 

 the thorax grey, with 3 brown stripes. Wings pale grey ; stigma very 

 pale brown, very narrow ; veins black, tawny towards the base. Hal- 

 teres yellow. Abdomen with 3 black stripes ; the middle ,one much 

 broader than the outer pair. Legs luteous, clothed with very short 

 black hairs ; tarsi black. 



Generally distributed. (E. S. I.) 



22. trigramma, Hms. ; Mg. zw. iii. 38. 42 (1822) ; Ztt.ptmctata 

 var. y, Fin. Lutea, antennis nigris, thorace cinereo-trimttato fusco- 



