BRITISH SPECIES OF DIPTEROUS GENUS FANNTA 181 



size, with small projecting lamellae; legs grey-black, knees 

 yellow; mid tibia gradually thickened towards the apex, the 

 pubescence very short at the base but longer towards the tip, 

 two dorsal and two postero-dorsal bristles ; hind femora with 

 one long bristle near the tip on the antero-ventral surface, and 

 a fasciculus of fine, long, hair-like bristles near the tip on the 

 postero-ventral surface ; hind tibia with two antero-ventral and 

 four or five equally long postero-ventral bristles, as well as the 

 usual dorsal and antero-dorsal bristles ; wings yellowish, third 

 and fourth veins hardly convergent; outer cross-vein nearly 

 straight, last portion of fourth vein about one and a half times 

 the penultimate ; calyptra yellowish, unequal ; halteres yellow. 

 9 . Stein describes the °. of this species ; besides the characters 

 in the frons, he gives the following : the antennae are strong and 

 long, the arista hair-like, slightly pubescent, the second joint 

 prolonged and moderately thickened; colour of thorax and 

 abdomen as in the $ , but somewhat shining ; colour of the 

 legs as in the 3 ; mid tibia with two antero-dorsal bristles ; 

 hind femora with three or four long bristles at the tip of the 

 antero-ventral surface ; hind tibia with two dorsal, two antero- 

 dorsal, and one antero-ventral bristle. 4! mm. 

 I have taken about thirty ? ? that would answer to this 

 description, but am of the opinion that they are sociella, Ztt. 

 My reason for this is that I have only a very few females of the 

 ordinary form of sociella, and have not met with a $ of 

 kowarzii. I took every specimen of the genus that I met with 

 during 1909, and cannot understand how I could have over- 

 looked the $ if it had occurred. The 9 ? occurred with 

 sociella $ £ . 



17. vcrrallii, Stn., $ . Black; eyes large, occupying almost the 

 entire side of the head, very close together; antennne of 

 moderate length, third joint three times as long as the second ; 

 arista slightly pubescent; thorax black, shining, with grey- 

 brown dusting ; abdomen much as in a'crea ; anal organ rather 

 large, with two small ventral appendages ; legs black, fore knees 

 pale yellowish ; mid femora moderately thickened on the basal 

 three-fourths, antero-ventral surface with a row of bristles on 

 the basal two-thirds which decrease in length but increase in 

 thickness as they advance, a short comb-like series of six 

 bristles on the base of the apical third, and three or four weak 



hairs before the tip; postero-ventral row weaker, but longer, 



the basal ventral bristle long and conspicuous; mid tibia J^S\ C/f^N. 



LA I BR AR Y 



