58 Orthorrhapha brachycera. 



Male. Eyes contiguous, the small frontal triangle grey; epistoma 

 greyish. Occiput grey with black hairs. Labrum about as long as 

 the head is high; palpi dark, with black hairs. Antemiæ scarcely as 

 long as the head, black, the two basal joints may be brownish and 

 are somewhat greyish pruinose, short-haired; the third joint not much 

 attenuated towards the apex. Thorax dull grey, with three faint and 

 indistinct stripes, the two lateral brownish, the median very indistinct 

 or wanting. Dorsocentral and acrostichal bristles somewhat longish, 

 black, biserial, the dorsocentral somewhat irregularly, the hinder of 

 them long; further a humeral bristle, a posthumeral, about three 

 notopleural, a pair of supraalar and a postalar bristle, all black; there 

 is also a bristle in front inwards to the humeri (this is not a bristle 

 special for this species, but it is here isolated). Scutellum with only 

 two long marginal bristles. Pleura grey, metapleura with black hairs. 

 Abdomen grey, dull, sometimes slightly brownish grey; it is some- 

 what densely clothed with rather long, erect, blackish or brownish 

 hairs, those at the hind margins of the segments slightly stronger; 

 venter coloured as the dorsum, sometimes a little paler, with short 

 hairs. Exterior genitalia somewhat as in tarsata, the lower lamellæ 

 somewhat blade-shaped and pointed, directed backwards or a little 

 upwards; the upper lamellæ styliform and curved, but more or less 

 hidden between the lower; sometimes a pair of small squamulæ are 

 seen above at the base of the lamellæ, I think they are processes 

 from the eighth dorsal segment; the lamellæ are black or brown, 

 hairy at the margin, The eighth ventral segment is arched and drawn 

 somewhat forwards in under the venter (anus hians); it has long 

 hairs in the margin. Penis is a very thin, upwards curved, yellow 

 thread, somewhat sinuous near the base. Legs dirty yellowish, or 

 brownish, almost blackish yellow; coxæ grey pruinose. Front femora 

 nearly bare; middle femora with two ventral rows of fine hairs and 

 with short hairs on the anterior side; hind femora with dorsal and 

 ventral rows of fine hairs; anterior tibiæ short-haired; the middle 

 ones with some bristly hairs dorsally and ventrally; hind tibiæ with 

 short hairs ventrally, longer and less dense hairs dorsally, and here 

 also with rows of fine bristles; tarsi short-haired. The hairs and 

 bristles are blackish or brownish. Wings hyaline; veins white, the 

 subcostal and cubital veins yellow, anal vein evanescent at some 

 distance from the margin. Stigma slightly yellowish or whitish, very 

 faint. Balteres whitish. 



Female. Frons broad, grey. The stripes on thorax slightly more 

 distinct, the hairs almost as long as in the male, those on abdomen 

 slightly shorter. Anterior legs short-haired; hind femora haired as in 



