BRITISH SPECIES OF DIPTEROUS GENUS FANNIA 207 



hair-like; mid tibia slightly thickened on the apical half, 

 ventral side, the pubescence very short on the basal portion, 

 but longer on the tip half, the bristling normal; hind femora 

 with an antero-ventral row of short bristles, the last two at the 

 tip stronger; postero-ventral surface bare; hind tibia with a 

 row of equally long hair-like bristles on the antero-dorsal 

 surface, a somewhat similar, but shorter, row on the postero- 

 ventral surface, and two bristles on the antero-ventral surface, 

 the usual dorsal bristle present; wings brownish, third and 

 fourth veins convergent, outer cross-vein slightly bent, last 

 portion of fourth vein about two and a half times the penul- 

 timate ; calyptra whitish, unequal ; halteres yellow. 



? . Stein gives the ? of this as identical with cor a ana. I have, 

 however, a $ without the ventral bristle on the mid tibia which 

 agrees with one bred from fungi with $ <$ of this species by 

 Mr Carter. With the exception of this difference the insects 

 are very similar. The hind femora have only two preapical 

 bristles on the antero-ventral surface in roraci?ia, but three or 

 four in matica. 



Common at Bonhill and Cardross; May to September. 

 Bred from fungi, Musselburgh (Carter). 



25. parva, Stn., $ . Black; eyes large, nearly confluent; frons 

 unprojecting, jowls descending but little below the eyes; 

 antennae of moderate length; arista pubescent; thorax black, 

 or black-brown, slightly shining, slightly brownish dusted on 

 the sides and behind; abdomen black-brown, brown-grey 

 dusted, paler grey dusted on the base of each segment, dorsal 

 line distinct; anal organ not very large, but on the ventral 

 surface two small shining black knobs present; legs black- 

 brown, mid femora hardly constricted at the apex ; antero-ventral 

 surface with a row of seven bristles of moderate length to rather 

 over the middle, a further series of seven finer, shorter, and 

 closer placed bristles to near the apex, and, following a short 

 break, two or three short bristles at the tip; postero-ventral 

 surface with the basal two-thirds armed with a somewhat similar 

 row, then a short break, and followed by the usual shorter 

 bristles, the basal ventral bristle absent ; mid tibia with the 

 apical half slightly thickened, the pubescence very short at 

 the base, becoming longer towards the apex, bristling normal : 

 hind femora on the antero-ventral surface with a row of short 

 bristles, the last two or three near the tip only rather longer ; 

 postero-ventral surface bare; hind tibia as in a'erea ; wings 



