190 Orthorrhapha brachycera. 



wards or forwards. Labrum is as long as labiiim, strong, broad at 

 the base, with three short points at the apex; it is semitubular and 

 curved somewhat downwards towards the apex; hypopharynx is but 

 slightly shorter, canaliculated, dilated towards the apex, but pointed 

 outermost; it is also curved a little down"wards; the maxillæ have a 

 lancet-like or blade-shaped lacinia, and cyhndrical, one-jointed palpi; 

 labium has a relatively large basal part, but short labella, which are 

 cleft to the base. Thorax is rectangular, very strongly arched above; 

 prothorax very small and likewise metathorax. There are uniserial 

 or irregularly biserial dorsocentral bristles, and bi- or quadriserial 

 acrostichal bristles; further a humeral bristle, one or two posthumeral^ 

 two to three notopleural, one or two supraalar and a postalar bristle. 

 Seutellum has six to eight marginal bristles. Metapleura are bare. 

 Abdoraen is cylindrical; in consists in the common way of eight seg- 

 ments; in the male the last segment is small, much lower than the 

 preceding, and more or less hidden under the genitalia; the latter 

 form a little knob-like forceps, which is directed up wards and seems 

 to be somewhat unsymmetrical. In the female the abdomen is pointed 

 and terminates with two thin styles. Legs somewhat slender, hind 

 tibiæ and metatarsi sometimes thickened in the male. The legs have 

 shorter and longer hairs and bristles, but no apical spurs are present. 

 There are two claws, tw^o well developed pulvilli, and a very smålig 

 linear, bristle-bearing empodium. The wings are not long; the me- 

 diastinal vein does not quite reach the margin; the cubital vein is- 



Fig. 74. Wing of M. anomalus. 



unforked, thus only one cubital cell; the discai vein is forked, thus 

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

 gin, the third is the upper branch of the postical vein, closing the 

 discai cell below; the lower branch of the postical vein recurrent; 

 there is no anal vein developed (or only the basal part, closing the 

 anal cell below). The discai cell is rather long; the basal cells small, 

 and the anal cell about as long as the second basal cell. Stigma 

 present. The axillary lobe is large. Alula not developed, but the 

 wing here with a long fringe. Alar squamula fringed at the margin. 



