133 



Leg proportions: 



Fore 



Middle 



Hind 



Wing length 3.40 mm.; venarum ratio 1.08. 



Goetghebuer's figure in "Die Fliegen" is in error; the spots in cell 

 Rs are progressively larger distally with the most basal one so small 

 as to be scarcely distinguishable; there is no distinct spot in the base 

 of cell M, only a faint shadow; cell Cui has a distal dark spot and, 

 near the center, a larger less distinct one; above and beyond the tip 

 of the anal vein is a dark spot and, along its anterior margin, two 

 more, one below f-Cu and the other below m-cu; on the anal margin 

 of the wing are 4 spots, the distal 2 being more or less doubled; r-m 

 cross vein with a large dark blotch, the m-cu cross vein darkened, 

 faintly darkened along M proximal to cross vein. Costal margin 

 clear except for distinct spot at Rj and faint cloud above large dark 

 r-m spot. 



Abdomen dark brown, each segment with narrow apical dusky 

 yellow fascia. 



Setae of basal lobe of basistyle heavier than distal ones. 



Male: Wing length 3.92 mm.; fore leg ratio 0.80; antennal ratio 

 2.44; venarum ratio 1.04; anterolateral bristles 4; prealar bristles 

 about 15. 



Females: Wing length, 3.51 3.89 mm. (2); fore leg ratio, 0.73, 

 0.83 (2); venarum ratio 1.01, 1.08 (2); anterolateral bristles 10 (1); 

 prealar bristles about 16 (1). 



In one female the pronotum was exceedingly produced, the dorso- 

 lateral bristles in a single row becoming about tripled anterior to the 

 scutellum. In the second female the pronotum was moderately 

 produced, the dorsolateral bristles in a single staggered row becoming 

 tripled. In a second male the pronotum was moderately produced, 

 the dorsolateral bristles, as the second female above, forming a group 

 of 10 bristles at the posterior end of the the dorsolateral bristles; the 

 mesonotum was ash grey. Legs infuscate yellow with dark band 

 above and below knee. 



Material examined: In BM(NH): 1 male, 2 females, London, 

 Putney, June 10, 1929, F. W. Edwards, B. M. 1929-297; Ormsby, 

 June 22, 1888, G. H. Verall, 93.-36; Radwell, Hertfordshu'e, June 15, 

 1917, F. W. Edwards. 



