158 Orthorrhapha brachycera. 



have a slight knob below near Ihe base; front metatarsi about as 

 long as the four following joints; hind tibiæ suddenly thickened at 

 the end and here densely haired on the postero-dorsal side, hind me- 

 tatarsi slightly thickened towards the base, almost as long as the 

 second joint; it has a small, recurved spine at the extreme base on the 

 postero-ventral side; eoxæ and femora grey, the latter shining some- 

 wliat greenish olive, with the apex yellow, broadly on the anterior 

 femora, but only slightly on the hind femora; anterior tibiæ yellow 

 with about the apical third blackish grey, hind tibiæ dark yellow with 

 base and apex black ; anterior tarsi black with the base of metatarsus 

 yellow, hind tarsi black; the front tarsi have the four last joints 

 compressed and slightly dilated, a little hairy at the upper margin, 

 the hairs on the last joint white. The legs have short, black hairs, 

 the front coxæ some bristly hairs above anteriorly; the femora have 

 slightly longer hairs below; posterior femora with about four to five 

 preapical bristles; front tibiæ with bristles above and on the postero- 

 ventral side, posterior tibiæ with two dorsal and one ventral row of 

 bristles. Wings hyaline or almost so; veins black; costa strongly thick- 



Fig. 48. Wing of T. notatus c?. 



ened on a streak between the base and the apex of the subcostal 

 vein; discai vein with a slight bend lying much nearer the posterior 

 cross-vein than the apex of the discai vein; the latter coverging to- 

 wards the cubital vein, the first posterior cell narrowly open ; posterior 

 cross-vein straight or almost straight; there is a slight blackish spot 

 on the bend of the discai vein and a similar seam on the posterior 

 cross-vein. Squamulæ pale yellow, with a black fringe. Balteres 

 yellow, the peduncle darker. 



Female. Antennæ slightly shorter than in the male. Epistoma 

 a little broader upwards, pale greyish or white. Front tarsi com- 

 pressed but not dilated, almost quite black; middle femora without 

 any knob; hind tibiæ not thickened at the apex and hind metatarsus 

 without spine at the base. Wings with the costal thickening distinctly 

 visible, but thinner than in the male. 



