HETEEOPTERA. 183 



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

 alls albis, costa n'ujricante. Long, f; alar. \\ lin. 



Buskij, with paler lee/s. Eyes small. Arista with thick whitish pu- 

 bescence. Scutellum short, nearly semicircular, TFings whitisJi ; cos- 

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

 (lushj towards the end ; costal vein with a few bristles at tlie base, a 

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

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

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

 transverse vein parted by its length from the prrebrachial transverse. 

 Halteres brown. JMiddle 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).— «^emV«ff, Hal. 

 E. M. i. 178. — minima, Mcq. — vitripemiis, Zett. Atra, velutina, aUs 

 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 tibiaj almost bare. 



Eare. In Mr. Haliday^s collection. (E.) 



22. melania, Hal. E. M. iii. 331. 22 (1836). Atra, opaca, alis 

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



Deep black, opaque, much rcsembbng 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 Z. nigerrima ; discal trans- 

 verse parted by its length from the pra3brachial transverse, Halteres 

 black. Legs piccous ; middle tibias almost without bristles. 



Eare. In Mr. HaHday's collection. (E.) 



Genus IV. HETEROPTERA. 



Heteropteua, Mcq. D. ii. 570 (1835) ; Hal. Borhorns A d, Meig. 

 Limosina p. ? Zett. 



Limosince charactercs, sed vena discalis transversa valde ohliquala. 



llesembles Limosina. Discal transverse vein placed so slanting that 

 ii becomes confounded with the prcehrachial longitudinal, but forms with 

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

 tcing : radial vein continued nearer to the tip than in Limosina. 



