Empididae. 49 



eiToneous, as he ascribes the hind femora in the female four rows of 

 bristles; to tlie male he correctly ascribes two rows. The often men- 

 tioned canaliculation of the hind legs, expressed in the name of the 

 species, is of no value, and is only due to exsiccation; it may be 

 wanting, or present to a different degree in various speciniens. 



The species only bears resemblance to spinipes, from which it is 

 distinguished in the male by the want of the tuft of bristles on the 

 hind femora, and in the female by the spines beneath the femora, as 

 also in both sexes by the in other ways different pilosity of the legs. 



Bh. sulcata is more common than the preceding species, though 

 it is generally only taken in single or few specimens at one time; 

 Charlottenlund, Ermelund, Geel Skov, Birkerød, Tyvekrog, Vemme- 

 tofte, Nyraad near Vordingborg; in Jutland at Silkeborg and at AUe- 

 rup near Esbjerg; it is a spring species, my dates are ^'k — ^/e. It 

 occurs in woods and thickets, especially on humid localities; Zetter- 

 stedt records it to ^^/t and has taken it on flowers of Salix. 



Geographical distribution : — Europe down into Spain and Italy ; 

 towards the north to northern Scandinavia, and in Finland. 



7. Rh. vesiculosa Fall. 



1815. Fall. Dipt. Suec. Empid. 27, 27. — 1842. Zett. Dipt. Scand. I, 

 433, 55. — 1903. Kat. paliiarkt. Dipt. II, 231. — Rhamphomyia Falleni: 

 1882. Meig. Sysl. Beschr. III, 50, 17. 



Male. Eyes contiguous ; epistoma grey. Occiput grey with blackish 

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

 dark brown with brownish hairs. Antennæ not longer than the head. 



Fig. 13. Antenna of Bh. vesiculosa. x 65. 



brownish black, slightly brownish at the base, the two basal joints 

 only with short hairs, the third joint but slightly elongated and slightly 

 attenuated towards the apex. Thorax dark grey, duU, with three 

 blackish brown stripes, the lateral broad, the median very narrow 

 and somewhat indistinct. Acrostichal and dorsocentral bristles of 

 moderate length, blackish brown; the former biserial, the latter strong 

 behind, shorter forwards and here pluriserial and fused with the hairs 

 on the sides of the disc. There are notopleural, supraalar and postalar 

 bristles, but they are only slightly discernible between the somewhat 



