84 Orthonhapha brachycera. 



hairs. Front femora with strong bristles or long, thin hairs below. 

 Male genitalia small ; the ventral lamella black, shining, or priiinose. 

 Fernale ovipositor compressed with free lamellæ. 



Of the genus about li2 species are known from the palæarctic 

 region; 2 are found in Denmark. 



Tahle of Species. 



1. Legs black, only the base of the tibiæ ferrugineous \. arthriticns. 



— Legs with femora. tibiæ and tarsi more or less ferrugineous 2. cingidatns. 



1, E. arthriticus Zeller. 



1840. Zeller, Isis 1840, 64, 16 {Asilus). — 1849. Low, Linn. Entom. 

 IV, 118,61. — 1855. Zett. Dipl. Scand. XII, 4566,6 — 7 (Asilus). — 1862. 

 Schin. F. A. 1, 156 {Asilus). — 1903. Kat. palåarkt. Dipt. II, 159. 



Male. Face yellowish brown; epistomal beard black above, yel- 

 lowish below, but here with a row of black hairs towards each side 

 of clypeus. Palpi black, black haired. Frons and vertex yellowish 

 brown with black hairs; occiput brownish pruinose, occipito-orbital 

 bristles black; the hairs whitish, down on the jowls yellowish. An- 

 tennæ black, the two first joints with black hairs which are longish 

 below. Thorax greyish brown, the middle stripe dark brown, broad 

 in front, narrowed behind, without any median line; the side stripes 

 greyish brown, not very distinct. The disc with very short, erect, 

 black hairs, which are considerably longer behind; the dorsocentral 

 and præsutural bristles generally black, the other bristles pale yellow. 

 Scutellum with short, erect hairs which are black or yellow or both 

 intermingled and the same is the case with the long marginal bristles. 

 Pleura greyish brown pruinose with some few longer, whitish hairs; 

 on the pteropleura, below the wing-root a couple of yellow or black 

 bristles; the long bristles on meta- and hypopleura yellow. Abdomen 

 greyish brown ; with the light from behind it is much darker with 

 the hind margins of the segments grey and the hind corners and side 

 margins of the same colour, and moreover with an indistinct, blackish 

 middle line. Venter greyish brown. Abdomen clothed with short, 

 yellow hairs, in the middle hne they are black, and the black hairs 

 may be extended much towards the sides; generally the last segments 

 are black haired; there are long, yellow bristles at the hind margin 

 of the segments towards each side; venter very sparingly clothed with 

 yellow, long and strong, bristly hairs and besides with short, depressed 

 yellow hairs. Genitalia small, black; the arms of the upper forceps 

 curved slightly down, rounded at the apex; the lower forceps short, 

 not reaching much more than half the length of the upper; the ven- 

 tral lamella black, shining; the genitalia have black hairs above, yellow 



