igii.] G. RiCARDO: Revision oi the species of Tabanus. 121 



spots. Fore tibiae blackish. Legs 

 and palpi blackish. Wings clear, 

 tinged brown. Forehead about a 

 third narrower anteriorh^ . hrnnuens, Macq. 



46. Forehead eight times longer than it 



is broad, the frontal callus not 



reaching e^^es . . . . 47 



Forehead ten times as long as it is 

 broad, the frontal callus reaching 

 eyes . . . . . . 48. 



47. Abdomen dark reddish brown or red- 



dish yellow, with indistinct small 

 greyish or yellow-haired median 

 spots, often absent. Thorax black- 

 ish with some 5^ellowish grey 

 tomentum. Fore tibiae pale on 

 basal half. Wings slightly tinged 

 with brown. Male with unequal 

 facets on eyes . . . . fitmi/ef, W'lk. 



Smaller species. Abdomen reddish 

 brown with distinct bright yellow- 

 haired median spots and similar 

 lateral spots on the 2-5 th seg- 

 ments. Thorax blackish with 

 greyish yellow tomentum . . nialayeusis, n. sp. 



Larger species. Abdomen broad, 

 reddish brown with indistinct 

 median spots and some lighter 

 segmentations. Thorax reddish 

 with some grey tomentum. Wings 

 nearly clear. Fore tibiae pale on 

 basal two-thirds. Male with 

 equal facets to eyes . . . . factiosus, Wlk. 



48. Abdomen reddish brown, median 



spots indistinct, small, whitish. 

 Thorax reddish, thickly covered 

 with ashy grey tomentum. Wings 

 clear .. .. .. dissimilis , n. sp. 



49. Abdomen and thorax reddish , shining, 



nearly devoid of pubescence. 

 Wings clear. Palpi ending in an 

 acute point .. .. ii:nohi/is, Rondsim. 



Abdomen and thorax reddish. 

 Wings tinged yellowish brown. 

 Palpi ending in an obtuse point .. )icxus,\V\k. 



50. Red-brown species with the large 



median white spots on third and 

 fourth segments of abdomen, and 

 white spots on the lateral borders 



