26 ARKIV FÖR ZOOLOGI. BAND 13. N:0 6. 



Mesonotum dark bluish gray, the praescutum without 

 distinct stripes, the position of the usual median stripe being 

 indicated by an indistinct light brown line on either side. 

 In the female, the lateral margins of the mesonotal prae- 

 scutum, before the wingroot, are brownish. Pleura dark 

 gray, the dorso-pleural membrane dull yellow. Halteres dark 

 brown. Legs with the coxae light gray; trochanters dull 

 yellow; femora light brown, the tips broadly dark brown; 

 tibiae brown, passing into darker brown at the tips; tarsi 

 dark »brown; legs comparatively short and stout, the meta- 

 tarsi shorter than the tibiae. Wings with a strong brownish 

 tinge; stigma darker brown; a whitish area beyond the 

 stigma in the outer end of cell 2nd Ri and the cephalic half 

 of i?2; a small whitish area in the ends of cell R and cell 

 M\ veins dark brown. Venation: m-cu distinct but short. 



Abdomen buffy yellow, the tergites with three broad 

 dark brown longitudinal stripes, two being sublateral, one 

 median, these broadly connected across the posterior half 

 of each segment; this dark börder is less extensive on ter- 

 gite two, increasing in amount on the succeeding tergites, 

 on segments six to eight including the entire sclerite; lateral 

 margins of the tergites broadly påle buffy. In the female 

 sex the dorso-median stripe is narrower and the posterior 

 margins of the intermediate tergites are narrowly yellowish. 

 Sternites dull yellowish, with a very narrow and indistinct 

 capillary brown median line. Male hypopygium with the 

 ninth tergite (plate 1, fig. 3) extensive, narrowed apically, 

 the caudal margin terminating in two divergent carinae with 

 the space between concave; viewed from the side these ca- 

 rinae appear as compressed blades. Outer pleural appendage 

 narrow basally, expanded distally into a flattened blade 

 (plate 1, fig. 5); ventral caudal angle of the ninth pleurite 

 produced into a short-cylindrical arm that is provided with 

 long hairs at the tip. Eighth sternite with a large flattened 

 appendage (plate 1, fig. 7) that is profoundly trifid, the 

 median lobe yellowish and slightly longer than the lateral 

 lobes, a little expanded at its apex; lateral lobes obliquely 

 truncated at their tips, dark brown, the bases and tips påle. 

 Ovipositor with the tergal valves long and slender, almost 

 straight; sternal valves much shorter, flattened, the tips 

 subobtuse. 



