72 Urthorrhapha brachyceia. 



legs, especially tlu; hind tibiæ. The fumigation of the wings 

 easily distinguishes Ihe feniale and seenis also to be darker in 

 the male. 



B. chtvipes is rare in Denmark and in all not many speciniens 

 have been taken: Hillerød (Godskesen): Lolland at Maribo and Nak- 

 skov (Schlick) and Jutland at Vejle and Silkeborg (O. G. Jensen). 

 My dates are ^*',b — ^'^'k. Zetterstedt I. c. says: , Dania fr." what may 

 mean Dania frequens: but this niay be due to sorne error as 

 the species is rare here, and Zetterstedt does not mention that 

 he has seen specimens, neither does lie ijuote Stæger which lie 

 otherwise does. 



Geographical distribution: — Northern and niiddle Europe down 

 into France, towards north to middle Sweden. 



?>. B. chalybeata Forst. 



1771. Muscti, Forst. Nov. spec. Ins. 1, 95.— 1862. Scliin. F. A. 1. 24. 

 — 1903. Kat. palaarkt. Dipt. II, 36. — 1S42. Berk sexdentata, Zett. Dipt. 

 Scand. I, 132, 2. — 1S46. Bei-is sexdentata, Loew, Stett. Ent. Zeit. VII, 

 261, 3. 



Male. Eyes hairy, the facets in the upper part slightly larger 

 than below, the dividing line slightly conspicuous. Antennæ black, 

 short, shorter than the head: the annulated part short and stubby. 

 Tliorax dark nietallic green, with blackish brown and somewhat 

 longish pubescence. Abdomen dull black with blackish pubescence. 

 being long at the margin. Venter brownish black, shining. Legs 

 yellow; coxæ brownish black; tarsi, except the bases, brownish black: 

 hind metatarsi yellow, much thickened; the four last joints of the 

 hind tarsi are also slightly dilated. Legs with fine yellowish pubescence. 

 Wings considerably brownish with brownish veins, stigma not con- 

 spicuous. Halteres blackish brown. 



Female. Eyes sparingly and short hairy. Front broad, black. 

 Thorax more greenish or bluish than in the male, with short, pale 

 brown pubescence. Abdomen dark brown, shining. Wings not brown 

 but distinctly yellowish, with light brown veins, stigma brown. Halteres 

 yellow. 



Length ;"J,.'-)— 5.8 mm. 



B. chalybeata is, as the preceding species, very rare in Denmark, 

 I know only a few specimens, all females; Hillerød (Godskesen), Jut- 

 land at Vejle (O. G. Jensen, Schlick); the speciniens have been taken 

 in June. 



Geographical distribution : — Northern and middle Europe from 

 the northern Sweden down into France. 



