176 THE SCOTTISH NATURALIST 



black-brown, and the yellow colour much more prominent ; the 

 frons projects much less than in canicularis ; the legs are almost 

 entirely black, the yellow at the base of the fore tibia being 

 very indistinct; the mid femora bear on the antero-ventral 

 surface about nine long bristles, instead of five as in canicularis, 

 and the same short apical row ; the posterior bristling is also 

 more numerous ; the mid tibia similar in shape and bristling 

 to canicularis, but the pubescence much longer, being about 

 as long as the thickness of the tibia ; there is a tendency to 

 more numerous bristling on the hind femora; the hind tibice do 

 not possess the uneven bristles on the antero-dorsal surface, and 

 there is only one strong bristle present on the antero-venlral 

 surface ; wings darkened ; calyptra pale. 



9 . I have not seen this sex, but Stein says that it is darker than 

 canicularis, the yellow on the abdomen is much more pro- 

 nounced, and the antero-ventral surface of the hind tibia has 

 only a single bristle. 5 to 6 mm. 



I have taken two £ £ at Bonhill, the date on the one I 

 still have being 14th September 1907 ; Mr Collin has the other 

 one. I saw a third <$ here in June. 



10. carteri, nom. nov. ( = femorala, Mall.), 3 . Dull black; eyes 

 large, frons, epistome, and jowls but little projecting; third 

 joint of antennae about two and a quarter times the second, 

 arista pubescent ; palpi normal, thorax dull black, dusted only 

 on the dorsum behind ; abdomen dull black, segments dusted 

 at bases, with dilated dorsal line and black lateral reflections ; 

 anal organ not prominent, but with two small black, pointed, 

 backward-directed appendages; legs black, fore-knees hardly 

 paler ; mid femora not greatly thickened, antero-ventral row of 

 long bristles beginning near the base, decreasing in length, 

 but becoming closer till about two-fifths from the tip they form 

 a comb-like row on the constricted portion of the femur; a 

 somewhat similar row of longer but weaker bristles on the 

 postero-ventral surface; ventral bristle long and strong; mid 

 tibia with the apical two-fifths distinctly but not greatly thickened, 

 much as in verrallii, Stn., pubescence on ventral surface very 

 indistinct on the unthickened portion, but long and erect on 

 apical two-fifths; two antero-dorsal and two postero-dorsal 

 bristles, the upper ones very weak ; hind femora bent and 

 dilated, thickest beyond the middle, antero-ventral surface 

 with a row of hair-like bristles which increase in length from 

 the base to the thickest part of the femora and then decrease to 



