50 



Orthorrhapha brachycera. 



pulvilli, especially large on the front tarsi in the male, and there is 

 a somewhat comb-shaped empodium. Wings with the subcostal vein 

 Short, the mediastinal terminating in it; the discai vein very slightly 

 bent, and with a distinct convexity; the anal vein not reaching the 

 margin; the posterior cross-vein about in the middle of the wing; the 

 axillary lobe rather well developed. Squamiilæ small, the angulary 

 lobe not large, bearing a long fan, the basal part of the squamulæ 

 with short hairs; below the squamulæ there is, as in Neurigona, a 

 small projection. 



The developmental stages of Eiitarsus are not known. 



Of the genus only one palæarctic species is known, also occurring 

 in Denmark. 



1. E. aulicus Meig. 



1824. Meig. Syst. Beschr. IV, 48, 6. (Porphyrops) et 1838. ibid. VII, 

 154,8 (Argijra). — 1843. Zett. Dipt. Scand. II, 615,102 (DolicJwpus). — 

 1903. Kat. palåarkt. Dipt. II, 293. 



Male. Vertex and frons bluish metallic, the bristles black. Epistoma 

 very narrow, whitish. Palpi dark. Occiput greenish, the postocular 

 bristles whitish, the upper five or six black. Antennæ black. Thorax 

 bronze-coloured, greenish in the middle, somewhat pruinose, almost 

 not shining. Scutellum metallic green, bare, with two 

 black bristles and on each side a small hair; postscutel- 

 lum green, greyish pruinose. Pleura green, somewhat 

 greyish pruinose, metaepimera yellow. The propleural 

 parts have fine, white hairs. Abdomen yellow or brownish 

 yellow, with brown or blackish incisures, which do not 

 reach the side margin; the first incisure is faint. Ab- 

 domen clothed with short, blackish hairs, at the hind 

 margin of the segments are somewhat long bristles, longest 

 on the first segment; at the sides of the first segment 

 and down the posterior side of the metaepimera are 

 yellow hairs. Venter yellow, with short, yellow hairs: 

 on the first ventral segment some long, bristly hairs. 

 Hypopygium small and quite hidden, only just to be 

 seen below at the end of abdomen. Legs yellow, middle 

 coxæ more or less greyish on the outer side, tarsi, ex- 

 cept the anterior metatarsi, infuscated. Front coxæ yel- 

 low-haired anteriorly, anterior coxæ with black bristles 

 on the anterior side at the end, hind coxæ with a black 

 bristle on the outer side; for the rest the legs with short, 

 blackish or brownish hairs, slightly longer below the 



I/' 



Fig. 12. 

 E. aulicus (S, 



hind meta- 

 tarsus. X 45. 



