238 Orthonhapha brachycera. 



black or blackish brown; hind metatarsus about of the length of the 

 second joint. The legs have short, black hairs, the front coxæ bristles 

 as usual, the hind coxæ one long and some small bristles on the 

 outside; front and hind femora short-haired, middle femora with 

 longer, bristly halrs below; posterior femora with a somewhat distinct 

 preapical bristle; anterior tibiæ with two rows of bristles above, 

 middle tibiæ also with two rows of small bristles below, the lower- 

 most pair longer; hind tibiæ with two dorsal rows and with small 

 ventral bristles; front tibiæ and metatarsi with short, fine hairs below. 

 Wings slightly brownish tinged; veins brownish black, the discai bend 

 moderately large, placed a little nearer the cross-vein than the apex; 

 subcostal vein terminating before the middle. Squamulæ yellow with 

 a broad, black margin above, and a long, yellow fringe. Halteres 

 yellow. 



Female. Epistoma broad, grey. Palpi large, grey. Antennæ 

 shorter than in the male, third joint short, arista longer than the 

 antennæ. Abdomen without yellow spots, metallic bluish green 

 with white, pruinose, triangular spots at the sides towards the front 

 margin of the segments, on the fifth segment united above. Femora 

 quite short-haired, and middle femora without bristly hairs below. 



Length 4,8—5,5 mm. 



A. magnicornis is like the preceding very rare in Denmark, only 

 two specimens, a male and a female, have been taken by Stæger in 

 Dyrehaven on ^^/o 1846. As I have examined Zetterstedt's type-speci- 

 mens my Identification is certain. 



Geographical distribution: — Northern and middle Europe down 

 into Austria; towards the north to northern Scandinavia; it seems 

 upon the whole to be a rare species. 



4. A. leucocephala Meig. 



1824. Meig. Syst. Beschr. IV, 49,8,?, et 1830. VI, 362 (Porphyrops), 

 et 1838. VII, 154,6. — 1843. Zett. Dipt. Scand. II, 589,77, et 1849. VIII, 

 3089,77 (Dolichopus). — 1862. Schin. F. A. I, 191. — 1878. Kow. Ver- 

 handl, zool. bot. Gesell. Wien, XXVIII, 447,6. — 1903. Kat. palåarkt. Dipt. 

 II, 324. — Dolichopus diaphanus 1823. Fall. Dipt. Suec. Dol. 16, 19, p. p. <?. 

 — Porphyrops diaphanus 1824. Meig. Syst. Beschr. IV, 46, 1, ?. — Doli- 

 chopus pellucens 1840. Zett. Ins. Lapp. 712, 18. 



Male. Vertex and frons black, in certain directions shining white; 

 eyes with pale brownish hairs. Epistoma narrow, velvet black. Palpi 

 small, black. Occiput grey pruinose; postocular bristles black above, 

 whitish below. Antennæ black, the third joint often brownish; they 

 are short, shorter than the head, the third joint triangular, about as 

 long as the basal joint; the arista twice or more than twice as long 



