HETEEOPTEBA. 183 



20. leucoptera, Hal. E. M. iii. 333. 20 (1836). Nigro-fusca, 

 alls albis, costa nigricante. Long, f ; alar, li lin. 



Dusky, with paler legs. Eyes small. Arista with thick whitish pu- 

 bescence. Scutellum short, nearly semicircular. Wings whitish ; cos- 

 tal vein and those next to it dusky, the rest colourless ; costal region 

 dusky towards the end; costal vein with a few bristles at the base, a 

 little thickened from the subcostal to the radial vein, the latter ending 

 much nearer to the subcubital ; marginal areolet long and very narrow ; 

 submarginal broad, not extending quite to the tip of the wing ; discal 

 transverse vein parted by its length from the praebrachial transverse. 

 Halteres brown. Middle tibiae bristly ; second joint of hind tarsi long, 

 scarcely thickened. 



Rare. In Mr. Halida/s collection. (E.) 



21. nigerrima, Hal. E. M. iii. 334. 21 (1836). aterrima, Hal. 

 E. M. i. 178. minima, Mcq. vitripennis t Zett. Atra, velutina, alis 

 albis. Long, vix ^ ; alar. 1 lin. 



Deep black, without gloss. Arista with abundant whitish pubes- 

 cence. Wings white-hyaline; veins colourless; costal blackish, not 

 thickened ; radial scarcely reaching to the middle of the rib ; cubital 

 arched, terminating before the tip of the wing ; transverse veins almost 

 contiguous; marginal areolet exceedingly small; submarginal wide, 

 oblong-ovate. Halteres black ; tarsi short ; middle tibiae almost bare. 



Bare. In Mr. Holiday's collection. (E.) 



22. melania, Hal. E. M. iii. 334. 22 (1836). Atra, opaca, alis 

 hyalinis. Long, vix i ; alar. 1 lin. 



Deep black, opaque, much resembling L. nigerrima. Eyes small, 

 with minute erect hairs. Arista thickly pubescent. Wings hyaline; 

 veins darker, very delicate; costal blackish; radial extending nearly 

 half-way between the subcostal and the cubital, the latter scarcely 

 arched, nearer to the tip of the wing than in L. nigerrima ; discal trans- 

 verse parted by its length from the praebrachial transverse. Halteres 

 black. Legs piceous ; middle tibiae almost without bristles. 



Bare. In Mr. Holiday's collection. (E.) 



Genus IV. HETEROPTERA. 



HETEROPTERA, Mcq. D. ii. 570 (1835) ; Hal. Borlorm A d, Meig. 

 Limosina p. ? Zett. 



Limosina characteres, sed vena discalis transversa valde oliliquata. 



Resembles Limosina. Discal tramverse vein placed so slanting that 

 it becomes confounded with the prabrachial longitudinal, but forms with 

 the pobrachial a very acute angle advanced towards the border of the 

 wing ; radial vein continued nearer to the tip than in Limosina. 



