186 Orthorrhapha brachycera. 



is long, but narrow, and terminating with a bristle-shaped part. The 

 wings have the mediastinal vein not distinctly reaching the margin, 

 but uniting with the subcostal vein; the cubital vein is unforked, and 

 there is thus one cubital cell; the discai vein forked, and there are 

 thus four posterior cells, and from the discai cell three veins go to 

 the wing-margin, the third is the upper branch of the postical vein, 

 which closes the discai cell below; the second branch of the postical 

 vein recurrent, the anal cell shorter than the second basal cell; the 

 anal vein long, straight, reaching the margin. Stigma present. The 

 axillary lobe large. Alula very small, fringed at the margin. Alar 

 squamula small, likewise fringed at the margin. 



The developmental stages of Trichina are, so far as I am aware, 

 not known. 



The species of Trichina occur in woods on humid and somewhat 

 shaded piaces; the males sometimes hover in the air. The species are 

 no doubt carnivorous. 



The genus is small, it comprises 5 palæarctic species; two have 

 hitherto been found in Denmark. 



Tahle of Species. . 



1. Scutellum with about eight bristles; legs yellow, hind tibiæ 

 slightly thickened; stigma not filling the apex of the subcostal 

 cell 1. ffavipes. 



— Scutellum with four bristles; legs with the hind femora and 

 tibiæ more or less dark brown in the apical half; hind femora 

 in the male with spine-like bristles below; hind tibiæ distinctly 

 thickened; stigma occupying the apex of the subcostal cell. . 2. clavipes. 



1. T. flavipes Meig. 



1830. Meig. Syst. Beschr. VI, 336, 1, Tab. LXV, Fig. 10. — 1842. 

 Zett. Dipt. Scand. I, 254 (Microjjhora^. — 1860. Loew. Zeitschr. fur Entom. 

 Breslau, XIV, 41, 3. — 1862. Schin. F. A. 1, 79 ( Microphorus). — 1903. 

 Kat. palåarkt. Dipt. II, 257. 



Male. Eyes touching for a long distance, the facets in the upper 

 half larger than below, the dividing line sharp. The narrow epistoma 



Fig. 72. Antenna of T. flavipes. x 100. 



black or greyish black; palpi blackish. Occiput black, shining, with 

 black, below with brownish hairs. Antennæ black, the style together 

 with the bristly apical part somewhat long, considerably more than 



