378 



Orthorrhapha brachycera. 



black hairs, and short hindmarginal bristles, long on the first segment; 

 at the sides of the first segment there are some paler hairs. Venter 

 greyish or a little yellowish, with pale hairs. Legs yellow ; hind 

 femora slightly darkened at the tip; tarsi with the three to four last 

 joints darkened, brownish. The legs have short, blackish or brownish 

 hairs, coxæ pale-haired; front coxæ with some bristly hairs at the 

 apex, hind coxæ with a small bristle on the outside, all pale; the 

 front metatarsus is slightly excised below and has on the basal half 

 a row of longer hairs; middle femora with four bristles 

 below at the base, the two middle the longest; the 

 middle tibiæ have two antero-dorsal and one postero- 

 dorsal bristle, and two ventral bristles in the middle; 

 hind femora with longish hairs above; the hind tibiæ 

 are somewhat short, slightly thickened; they have in 

 the middle, in a very slight emargination, a number 

 (probably six or seven) of flat bristles, which are 

 thickened towards the end ; the bristles are very close- 

 standing and therefore not easily counted; just below 

 these bristles there is a tuft of longer, somewhat 

 curled hairs, which may be somewhat coalesced; 

 between this ornamentation and the apex are two 

 long bristles; besides the hind tibiæ have fine, longish 

 hairs on the postero-ventral side, some hairs and 

 bristles above, and some bristles on the basal half of 

 the anterior side ; the posterior femora have a preapical 

 bristle; hind metatarsus as long as the second joint, 

 with longish hairs and some bristles below, longest 

 at the base. Wings about hyaline or slightly tinged; veins blackish; 

 costa >vith a thickening as in the preceding species, but still larger 

 and longer. Squamulæ yellow, with a yellow or dark yellow fringe. 

 Halteres yellow\ 



Female unknown. 

 Length 1,5 mm. 



This species is very closely allied to pectinifer Kowarz (Verhandl. 

 zool. bot. Geseli. Wien, XVIII, 1868, 218); the ornamentation on the 

 hind tibiæ is very similar, but however different, and signatiis is 

 moreover distinguished by the hind metatarsus being not longer than 

 the second joint, and by the yellow squamular fringe. — The species 

 was described by Zetterstedt 1. c. as Chrysotus sigiiatus from a single 

 male specimen, sent from Stæger, and this specimen I have examined, 

 but there is still another specimen in our coUection; Zetterstedt does 

 not mention the armature of the hind tibiæ; on pag. 3096 of the 



Fig. JI6. 



Hind tibiæ of 



T. signatus (S. 



X 55. 



