DUEHAM DIPTEBA. 285 



XXXIII. 474. 



34 (23). Squamae with the under scale protruding. 



35 (38). Abdomen translucent at the base ; if not, then the 



dorsum more or less distinctly three-striped. 



36 (37). Dorsum more or less distinctly striped ; fore knees 



distinctly yellow. canicularis, L. (2143) 



37 (36). Dorsum uniform grey ; fore knees black. 



{difficilis, Stein) 



38 (35). Abdomen nowhere translucent yellow ; dorsum never 



three-striped. 



39 (44). Mid tibiae outer front side with at least two bristles. 

 40(41). Hind tibiae inner side with only one bristle; costal 



spine distinct. (barbata, Stein) 



41 (40). Hind tibiae inner side with several bristles ; costal 



spine absent. 



42 (43). Hind tibiae inner side with usually three or four 



bristles ; orbits not shining ; fore orbital bristle 

 nearer to the frontal stripe than to the eye margin ; 

 palpi normal. (2144. ar??mfa, Mg.) 



43 (42). Hind tibiae inner side with two fine bristles ; orbits 



faintly but perceptibly shining ; fore orbital bristle 

 nearer the eye margin than the frontal stripe; 

 palpi small. (ininvtipalpis, Stein) 



44 (39). Mid tibiae outer front side with only one bristle. 



45 (46). Hind tibiae inner side with only one bristle, the fore 



orbital bristle nearer the frontal stripe than the eye 

 margin. ( 2I 57- glaucescens, Ztt.) 



46(45). Hind tibiae inner side with several bristles; fore 

 orbital bristle nearer to the eye margin than to the 

 frontal stripe. 



47 (48). Fore tibiae outer side with only the praeapical bristle ; 



dorsum dark grey with very indistinct stripes. 



manicata, Mg. (2140) 



48 (47). Fore tibiae outer side with a bristle in addition to the 



praeapical bristle. 



49 (50). Mid femora beneath at the base with a remarkably 



long hair-like bristle. scalaris, F. (2142) 



50 (49). Mid femora beneath at the base, without this bristle. 



incisurata, 7At. (2158) 



