128 Orthonhapha biachycera. 



Male. Eyes wilh one band; eye-facets in the two upper thirds 

 niucli larger tlian below, tlie small facets not reaching the ocellar 

 tubercie behind. At the upper eye-margin sliorl yellow hairs, scarcely 

 extending over the eye-margin. Frontal triangle grey, dark at the 

 apex; face grey, greyish haired. Antennæ reddish. style dark; upper 

 corner of first basal joint much produced over the second. Second 

 joint of paipi (Fig. 38) yellowish grey, somewhat thickened especially 

 beneath, ovate, apex somewhat truncate with a little point below ; 

 clotlied with whitish and black hairs. Thorax grey with five pale 

 stripes, on the disc clothed with longer brownish grey and shorter 

 yellowish golden hairs; pleura and sterna pale haired. Præalar cailus 

 generally yellowish. Abdomen reddish wilh a broad dorsal line and 

 apex black, or in other terms, black with reddish rnarkings on the 

 sides of the second and third segments; clothed with black and pale 

 hairs, the latter forming triangles on the niiddle line and oblique 

 spots on the sides; seen from behind the pale haired spots are silver 

 grey pruinose. Venter reddish with a more or less interriipted niiddle 

 line and the apex dark grey ; the reddish rnarkings may be restricted 

 the venter then being more grey. Legs with the femora black; tibiæ 

 rufous, apical half of front tibiæ black, posterior, especially hind, tibiæ 

 darkened at the tips; front tarsi black, posterior tarsi dark brown; 

 legs haired in the usual way with mostly pale hairs, on the outer 

 side of the hind tibiæ with a not dense fringe of rather long, pale 

 ciliæ intermingled with some black ones. Wings hyaline, veins brown. 

 Halteres brown, peduncle a little paler. 



Female. Eyes greenish with one diagonal band. Frontal band 

 greyish yellow with parallel horders or slightly narrowed below; 

 frontal callus quadratic, middle cailus linear. The hind margin of the 

 head along the upper eye-margin very narrow, with short yellow 

 hairs. Second joint of palpi (Fig. 38) rather thick, very convex on 

 the front side, with whitish and, on the outer side, black hairs. Ab- 

 domen with very small, reddish rnarkings, or these sometinies wanting 

 and hence the abdomen being dark grey with the three rows of pale 

 haired spots very distinct. 



Length 13—14,5 mm. 



The pupa has a length of 18 mm. 



T. bromius is a conmion species here and is frequently seen on 

 cattle; vicinity of Copenhagen, Ordrup Mose. Donse, Frerslev Hegn, 

 Jægerspris, Esrom Sø, Tiis Sø, Vordingborg: Funen at Lundel)org on 

 the eastern coast; Lolland, and Jutland at Sveibæk near Silkeborg 

 and at Silkeborg. My dales are ^"/i; — '*'/8. The larva has been taken 

 in Tiis Sø; the pupa developed on '/-. 



Geographical distribution: — All Europe. 



