igii.] G. RiCARDO : Revision of the special of Tabanus. 119 



Abdomen covered with yellowish 

 tomentum, median stripe very 

 broad. Fore femora black. Wings 

 clear .. .. .. aurotcstaceus^VJXk. 



35. Black species. Abdomen with ferru- 



ginous lateral stripes on the first 

 four segments. Legs blackish 

 brown .. .. .. tristis, x . (\. \\\\\^. 



36. Forehead narrowest anteriorly . . 37. 

 Forehead narrowest at vertex . . 38. 



37. Small black species. Abdomen with 



a median gre}' stripe beginning on 

 the third segment only, the lateral 

 stripes terminate on the second 

 segment .. .. .. ]ucundiis,\N\k. 



38. Small brown species. Abdomen with 



a median grey stripe . . put ens, n. sp. 



Group VIII. 



39. Wings with first posterior cell closed 



or at least very much narrower at 

 border. Forehead six to seven 



times as long as it is broad . . 40. 



Wings with first posterior cell open, 



never very narrow at border . . 41 . 



40. Abdomen with three series grey spots 



on abdomen, reddish brown in 

 male, blackish in female . . amaenus, Wlk. 



Abdomen with three grey spots on 

 the first two or three segments 

 only, a larger, broader bodied, 

 blackish species . . . . mandariniis, Schiner. 



41. Forehead narrow, six to ten times as 



long as it is wide anteriorl^^, with 



a long narrow frontal callus . . 42. 



Forehead broader, four to five times 

 as long as it is wide anteriorly, 

 with a larger nearly square, or 

 pear-shaped frontal callus . . 52. 



42. Brown, reddish brown, or reddish 



yellow, medium sized or large 



species, the triangular greyish or 



yellowish spots not usually form- 

 ing a continuous stripe . . 43. 

 Large unicolorous reddish species 



with small median indistinct white 



spots . . . . . . 49. 



Reddish brown or brown species with 



large prominent median whitish 



