136 THE SCOTTISH NATURALIST 



may belong either to a known species described from the 

 male, or be only a peculiarly bristled specimen of a known 

 species. 



Table of Species (Males). 



i (8). Legs with at least the hind tibia translucent yellow,, 

 (Sometimes indistinct.) 



2 (5). Mid coxa with a strong, downward directed thorn. 



3 (4). Mid and hind femora and tibioe pale. 1 hamata, Macq. 



4 (3). Mid and hind femora black. 2 fuscula, Fin. 



5 (2). Mid coxa without a thorn. 



6 (7). Abdomen partly translucent yellow. 3 pretiosa, Schin. 



7 (6). Abdomen black. 4 pallitibia, Rnd. 



8 (1). Legs all black, or at most the knees yellow. 



9 (14). Mid coxa with a strong thorn. 



10 (13). Fore tibia with a prominent tuft of hairs at the apex. 

 n (12). Mid tibia with a distinct tubercle, fore tarsi normal. 



5 mcmicata, Mg. 



12 (11). Mid tibia only gradually thickened, fore tarsi dilated. 



6 ?no?iilis, Hal. 



13 (10). Fore tibia without a tuft of bristles, mid tibia with a 



tubercle. 

 13a (13b). Mid tibia tuberculate, hind tibia not remarkably haired. 



7 sea/art's, Fab. 

 13b (13a). Mid tibia without a distinct tubercle, hind tibia ciliated 



with long hairs. 7a ciliata, Stn. 



14 (9). Mid coxa without a thorn. 



15 (iS). Abdomen partly translucent yellow at the base, sometimes 



indistinct in canicularis. 



16 (17). Thorax grey - brown, mid tibia with extremely short 



pubescence. 8 canicularis ^ L. 



17 (16). Thorax black-brown, mid tibia with longer pubescence. 



9 difficilis, Stn. 



18 (15). Abdomen black, without yellow markings. 



19 (20). Hind femora bent, swollen before the tip, and long haired 



ventrally. 10 carteri, n. n. 1 (=femorata, Mall.) 



20 (19). Hind femora not remarkably bent or swollen, or bare on 



one side. 



1 Since the publication of the description of F. pernor ata {Ent. Mo. Mag., 1909), 

 I find that the name is preoccupied in the genus by a species described by Loew 

 in 1 861 belonging to the North American fauna, and alter that of my species 

 to carteri in honour of Mr A. K. J. Carter, the discoverer of the insect. 



