new Species oj Tabani*. 329 



tlie anterior border, on tlie po-terior border a small, median, 

 yellowish spot with yellow hair divided in half by a line or 

 furrow ; on the second segment the grey triangular spot is 

 long, reaching the anterior border, narrow at its base; on the 

 three following segments the spots are wider and shorter, not 

 reacliing the anterior border; on the sides of the second, 

 third, and fourth segments an isolated, roundish, grey spot is 

 visible ; in one of the other females from Waihen the spots 

 are more distinct and oblong, and a small one is perceptible 

 on the iif'th segment, the segmentations from the third segment 

 are narrowly whitish ; the dorsum rather thickly covered 

 with short black hairs, a few yellow hairs are visible on the 

 bases of the grey triangles ; underside reddish, transparent, 

 with white segmentations and pubescence; the margins of 

 abdomen on the fourth, fifth, and sixth segments are yellow, 

 transparent, with some white pubescence. In one of the 

 specimens the side spots are rather indistinct, the triangle on 

 tlie second segment does not reach the fore border, and the 

 alidomen is darker, showing no light segmentations. Legs 

 reddish, the fore coxai blackish with long white hairs ; the 

 ])ubesceiice on the femora black, on the fore tibias white, on 

 the middle and posterior tibite black ; the apex of the fore 

 tibise and all tarsi blackisii ; some grey tomentura on the 

 femora. Wings greyish, tinged with yellowish brown on all 

 the veins and on fore border ; stigma the same colour ; 

 veins brown. In a third specimen from the same place the 

 side spots are rather indistinct, the triangle on the second 

 segment does not reach fore border, and the abdomen is larger, 

 showing no light segmentations. 



Tahanus silvanus, $ , sp. n. 



The following specimens are in the British Museum 

 collection : — 



Type'(female) and another from Amboihimitombo Forest, 

 Madagascar (Forsyth Major Coll.), 98. i6. 



A dark brown species with almost clear wings ; the abdo- 

 men obscurely brown, with distinct, grey, median, triangular 

 spots and narrow grey segmentations ; the antenna3 blackish. 

 Legs dull reddish. 



Length 15 mm. 



This species is probably relatetl to Tahanus atrimauus, 

 Loew, but distinguished from it by the absence of the huge, 

 tomentose, white side spots on the second segment, and by 

 the legs being redder. 



Head broader than thorax. Face greyish white with white 



