Empididae. 47 



bristles dorsally on the hind femora, and on tlie tibiæ; there is no 

 tuft of bristles on the hind femora, and the dense, short pubescence 

 on the posterior femora is wanting. 



Length 6,5 — 8 mm. 



This species, which is our largest Rhamphomyia, is easily distin- 

 guished both by the size, and in the male by the curious tuft of 

 bristles on the hind femora. 



Rh. spinipes is not at all common in Denmark, I only know of ten 

 specimens; Sorø (Jacobsen) and in Jutland at Rye near Silkeborg and 

 on Seis Hede (A. Petersen). It is an autumn species, my only date 

 is ^Vt) (Seis Hede), but it is recorded from September and October. 

 It occurs generally in woods on humid localities; Zetterstedt records 

 it from the twelfth of July, and the same author took it at a height 

 of 4000 feet „in nive ambulans". 



Geographical distribution : — Northern and middle Europe down 

 into France; towards the north to northernmost Scandinavia. 



6. Rh. sulcata Meig. 



1804. Meig. Klass. eur. zweifl. Ins. I, 229,. 26 (Empu). — 1842. Zett. 

 Dipt. Scand. I, 396, 8 et 1849. VIII, 3034, 8 et 1859. XIII, 5012, 8. - 

 1862. Schin. F. A. I, 98. — 1903. Kat. palåarkt. Dipt. II, 230. 



Male. Eyes contiguous, the small frontal triangle blackish, light 

 grey above the antennæ. Epistoma grey; occiput grey with black 

 hairs. Labrum somewhat longer than the head is high; palpi black 

 with black hairs. Antennæ somewhat longer than the head, black, 



12. Antenna of Bh. sulcata. X 65. 



the two basal joints slightly greyish, with black hairs; the third joint 

 elongated, the terminal part not much attenuated. Thorax brownish 

 grey, somewhat shining, with three blackish stripes, the median nar- 

 row; besides there is generally a dark shade at the side margin. The 

 dorsocentral and acrostichal bristles somewhat short, black or brownish 

 black; the acrostichal bristles pluriserial, the hindmost dorsocentral 

 bristle long, forwards they are pluriserial and fusing with the hairs 

 clothing the disc behind and inwards to the humeri; there are no 

 humeral or posthumeral bristles, but three or four notopleural, some 



