l\Ii-. J. R. Mallocli 071 Exotic Muscaridse. 579 



continued over disc of .scutelliini ; an- 

 terior bi-istle on middle of hiud tibia 



apiccid of the antero-dorsal one iruequivitta, sp. n. 



Tlionix with the vitt;e not bs above, the 

 anterior lateral ang-les of scutelluni never 

 darker than the disc 26. 



26. Cross-veins of winjrs slig-htly but distinctly 



infuscated ; arista bare ; small species, 



3'o mm. in length costata, Stein. 



Cross-veins of wings not infuscated 27. 



27. Third autennal segment pale yellow; small 



species, about 13 mm. in length 28. 



Third ant'-nnal segment not yellow 29. 



28. Fore and mid tibite without bristles at 



middle dorsalis, v. Roser. 



Fore and mid tibiae with the normal median 



bristles loru/itarsis, Stein. 



2'.'. Hind tibia witli only the antero-dorsal 



bristle at middle venia, sp. n. 



Hind tibia with the usual two bristles at 



middle 30. 



30. Large species, averaging over 5 mm. in 



length 31. 



Small species, not over 4 mm. in length . . 34. 



31. Fore femora entirely yellow; arista short- 



haired simili'x, Stein. 



Fore femora partly blackened; arista dis- 

 tinctly ])ubesceut 32. 



32. Thora.v indistinctly vittate laterally; third 



antennal segment much longer than dis- 

 tance from its apex to mouth-margin ; 

 anterior sterno-pleural bristle long and 



strong nataliu, sp. n. 



Thorax conspicuously vittate laterally ; 

 third antennal segment as long as dis- 

 tance from its apex to mouth-margin ; 

 anterior stemo-pleural bristle short and 

 weak 33. 



33. Hind tibia with the anterior bristle but 



slightly banad of the antero-dorsal one ; 

 fore femur with a black dorsal mark on 

 apical tliird ; median vitta not con- 

 tinued over scutcUum atroapicata, sp. n. 



Hind tibia with the anterior bristle very 

 distinctly basad of the antero-dorsal one; 

 fore femur with a black streak on pos- 

 tero-dorsal surface from base to apex ; 

 median vitta continued over scutellum. . calopoda, Bezel, 



34. Arista with its longest hairs about as long 



as width of third antennal segment; 

 abdomen with distimt paired spots and 



median vitta on dorsum punctlgera. Stein. 



Arista barely })uV)escent 35. 



.''5. Mid and hind femora on antero-ventral 

 surface on their entire length with long 



