30 Ortlioirliapha hrachycera. 



Geographical distribution: — Nortiiem and niiddle Europe, from 

 soulhern Sweden to tlie southern Germany and Austria. 



4. N. nigrinus Fail. 



1817. Fall. Dipt. Suec. Stiat. 6, 3. — 184-2. Zett. Dipt. Scand. 1, 151, 5. 

 — 1846. Loew, Linn. Entom. I, 454, 15. — 1862. Schin. F.A. I, 5. — 

 1903. Kat. palaarkt. Dipt. II, 7. 



Male. Snout moderately long, pointed ; antennæ blackish, inserted 

 very high, near to the eye-niargin. Snout and front bkiisii black, 



d 9 



Fig. 12. Head of X. >ii(iri)iits male and female. 



witliout spots. Eyes round, nearly toucliing above tiio frontal triangle, 

 bare, dark greenish, slightly metallic, with a reddisii violet band below 

 the middle on tlie line dividing the large and small facets. Thorax 

 black, shining, somewhat punctate, slightly and very short haired; the 

 pale humeral cailus small, and the stripe going to the wing-root, 

 narrow, botli brownish yellow. Abdomen black, more or less bluish, 

 somewhat punctate and somewhat dullish in front but shining be- 

 hind. Venter black. Femora black, broadly wliite at the tips, tibiæ 



Fig. 1.3. AVing of N. nigrinus. 



and tarsi whitish, hind tibiæ black in the middle, anterior tibiæ more 

 or less darkened, and the tarsi distinctly darkened towards the ends. 

 Wings hyaline with wliite veins, stigma yellowish, cubital vein not 

 forked. Halteres white, the peduncle slightly darkened. 



Female. Front broad, snout rather long, pointed, no spots above 

 the antennæ. Eyes roundish, higiier tlian long, coloured as in the 

 male, but the band situated in the middle. All the rest as in the male. 



Length 3,8 — 4,o mm. 



This species is at once recognised by the shape of its snout with 

 its high inserted antennæ, and the absence of white spots, by its to- 

 tally black colour and especially by the unforked cubital vein. 



