130 Orthorrhapha brachycera. 



small, CLineiform spot on each side, more or less connected in front 

 with the lateral stripe; the space in front of the scutellum is darker 

 brown. The dorsocentral and acrostichal hairs are somewhat long, 

 but fine, and pluriserial; they are long and strong behind, and the 

 three rows are here more or less fused together; the sides of the 

 disc are clothed with slightly shorter hairs, which are fused with the 

 dorsocentral hairs. The hairs are all black. Further a humeral 

 bristle, about three posthumeral, a number of notopleural and supraalar 

 and one postalar bristle, all strong, black; on the humeri there are 

 many rather strong, bristly hairs. Scutellum has a number of stronger 

 and weaker, black marginal bristles, Pleura greyish or greyish brown, 

 metapleura with numerous, stronger and weaker, black bristles; pro- 

 pleura with black hairs. Pro- and mesothoracic spiracles light brown. 

 Abdomen brownish, the colours somewhat reflecting, changing accord- 

 ing to the view ; seen from behind abdomen has a dark middle stripe 

 or dark triangles; it is clothed with black hairs, which are longest at 

 the sides and strong at the hind margins of the segments. Venter 

 greyish, without strong hairs. Exterior genitalia not large, the lower 

 lamellæ broad, somewhat triangular, rounded or sHghtly pointed at 

 the apex, and directed somewhat upwards; the upper lamellæ are 

 seen above the lower, they are very small and likewise triangular. 

 Penis is hidden. The lower lamellæ are somewhat shining, densely 

 haired with longish hairs, among which some few stronger. Legs 

 with the coxæ greyish pruinose, otherwise somewhat varying in colour 

 and thus giving rise to two, somewhat distinct varieties; either the 

 femora are black, tibiæ and tarsi rufous, the latter blackish towards 

 the apex (genuina), or the legs quite rufous or yellowish, only the 

 front femora more or less blackish at the base and the tarsi blackish 

 at the apex {rufipes Stæg. in litt. Zett. 1. c, livida Fabr.). The hind 

 tibiæ have a small, low, somewhat densely haired knob on the 

 posterior side, at a little distance from the base. The legs are some- 

 what strongly haired and spined; front femora with longish hairs 

 below, and strong bristles on the anterior and posterior side; middle 

 femora with bristles on the anterior, ventral and postero-ventral side; 

 besides the anterior femora have a very short, dense, pale pubescence 

 ventrally; hind femora with strong bristles all round, except above, 

 and with longer, thin hairs towards the base, especially on the dorsal 

 and posterior side; front tibiæ with two rows of strong bristles on 

 the dorsal side, and with a short, brownish pubescence ventrally; 

 middle tibiæ with (four) rows of strong bristles on the various sides ; 

 hind tibiæ with two rows of strong bristles on the dorsal side and a 

 short ciliation ventrally; tarsi with strong bristles at the apex of the 



