Dolichopodidae. 41 



1. N. quadrifasciata Fabr. 



1781. Fabr. Spec. Ins. Il, 448, 69 (Musca) et 1794. Ent. Syst. IV, 

 342, 126 (Musca) et 1805. Syst. Antl. 269, 16 (Dolichopus). — 1824. 

 Meig. Syst. Beschr. IV. 48, 7 {Porphyrops) et 1838. Vil, 154, 9 (Argyra). 

 - 1843. Zett. Dipt. Scaiid. II, 614, 101 et 1849. VIII, 3098, 101 {Doli- 

 chopus). — 1862. Schin. F. A. I, 183. — 1903. Kat. palaarkt. Dipt. II, 293. 



Male. Vertex and frons grey, the bristles black. Epistoma nar- 

 row, light grey. Palpi yellowish. Occiput grey, the postocular bristles 

 yellowish white. Antennæ yellow, arista brown. Thorax grey, in 

 the middle two indistinct darker stripes, separated by a slightly lighter 

 space; the humeri yellowish. Scutellum yellow, with two black bristles, 

 and on each side a small hair; postscutellum grey. Pleura grey, 

 posteriorly a little yellowish, below the squamulæ a small, blackish 

 spot; there is a white prothoracic bristle. Abdomen yellow, some- 

 what shining; the sixth and sevenlh segments visible; at the anterior 

 margin of the second, third and fourth segments there is a transverse 

 black or blackish brown band (on the second segment it lies a little 

 behind the margin) ; the bands are more or less incised behind in the 

 middle; the sixth segment is blackish towards the hind margin. The 

 fifth segment has two black, triangular ventral teeth. Abdomen is 

 clothed with short, blackish hairs, almost not longer at the hind 

 margin of the segments, only the first segment has long, black bristles 

 at the hind margin ; at the side margin of the segments on the last 

 half part of abdomen the hairs are longer and more or less pale, 

 also at the end of the fourth segment there are pale hairs, and the 

 fifth segment is pale-haired and with long and dense, yellow bristles 

 at the hind margin. Venter yellow with yellow hairs. Hypopygium 

 black or blackish, shining, almost rectangular, with small middle and 

 posterior ventral lobes; the eighth segment has a few pale hairs and 

 is shghtly pruinose at its posterior margin. The hypopygium is deeply 

 incised above, so that the outer lamellæ are placed about in the 

 middle; these latter are small, whitish, hairy at the margin; of the 

 inner lamellæ a small, styliform part is seen below, ending with an 

 upwards turned spine. Legs yellow, front tarsi with the third and 

 fourth joints plumed with black hairs at the sides ; the tirst two joints 

 long; the middle metatarsus longer than the four following joints and 

 the hind metatarsus a little shorter than the second joint. The anterior 

 coxæ with some bristly hairs anteriorly, the hind coxæ with a black 

 bristle on the outer side. The legs clothed with short, brown or 

 blackish hairs, the femora bare beneath, only the hind femora here 

 with short hairs; the middle tibiæ with some bristles, especially on 

 the anterior side, the hind tibiæ likewise, especially on the dorsal 



