250 Orthorrhapha brachycera. 



Lolland at Maribo and Ryde ; on Funen at Odense ; in Jutland at 

 Horsens and at Hald near Viborg, and finally on Bornholm at Rø. 

 My dates are ^^le—'^'^h. It occurs in woods on open, somewhat shaded 

 piaces on bushes and in low herbage. 



Geographical distribution : — Northern and middle Europe down 

 into France ; towards the north to northern Sweden. It is also recorded 

 to occur in North America. 



2. Ph. albiseta Zett. 



1838. Zett. Ins. Lapp. 544, 8 (Hemerodromia) . — 1842. Zett. Dipt. 

 Scand. I, 271,3. — 1862. Schin. F. A. 1, 86. — 1903. Kat. palåarkt. Dipt. 



II, 271. — Hemerodromia vocatoria: 1822. Meig. (non Fall), Syst. Beschr. 



III, 65, 7, Tab. XXIII, Fig. 15. 



Male. Frons and vertex grey, the ocellar tubercle blackish: 

 epistoma white; palpi yellowish. Occiput dark grey, with black bristles 

 above, and somewhat long, whitish hairs below. Antennæ yellow, 

 third joint dark brown or black, arista white, Thorax grey, some- 

 times a little yellowish towards the sides, There is only a bristle in 

 front, inwards to the humeri; on the middle there is but a pair of 

 very small, scarcely observable hairs on each side; further a noto- 

 pleural and a supraalar bristle; all the bristles black. Scutellum with 

 two black marginal bristles. Pleura yellow, a little pruinose. Abdomen 

 dark grey, with short, yellowish hairs. Venter grey. Exterior genitalia 

 dark yellowish or brownish, smaller than in vocatoria. Legs yellow, 

 with the last tarsal joint dark; they are haired and armed quite as 

 in vocatoria. The wings as in vocatoria, but the discai cell narrower. 

 Halteres whitish yellow. 



Female, Quite similar to the male; venter sometimes yellowish; 

 the ovipositor terminating with two distinct styles, 



Length 2 — 2,6 mm. 



This species is distinguished from vocatoria in the male by the 

 smaller and darker genitalia, and in the female by the distinct styles 

 at the end of abdomen; in both sexes the absence of a middle bristle 

 on the thoracic disc is a good character, and also the shape of the 

 discai cell, though this may vary a little in both species; finally the 

 colour of thorax is grey in alhiseta, yellow in vocatoria. 



Ph. albiseta is rare in Denmark, and was for the first time taken 

 in 1909 in Geel Skov on ^h—^^h (the author). It occurred in a little 

 fen in the wood, especially on the leaves of Galla palustris. It seems 

 to be a late occurring species. 



Geographical distribution : — Northern and middle Europe down 

 into France; towards the north to northern Scandinavia. 



