35G Mv. E. E. Austen on neio 



East Africa Protectorate : Athi Plains, alt. 5,000 ft., 

 May, 1911 («. B. Woosnam). 



According to a note by the collector and donor, in whose 

 honour the species is named^ the type atid para-types were 

 " taken during the rainy season, in tlie Southern Game 

 Reserve, near water and trees.^^ One specimen was caught 

 in the act of biting its captor. 



In addition to the specimens here regarded as belonging 

 to the typical form of this species, as described above, the 

 National Collection possesses a ? fro n ?ilakindu. East 

 Africa Protectorate, 17. i. 1910 [Dr. IV. M. Aders), which 

 would appear to represent a variety of D. looosnami. In this 

 example, which was caught on a zebra just after it had been 

 shot, the third joint of the antennae is much brighter in 

 colour than in the typical form, — in fact it is orange-rufons, 

 and therefore much as in D. compactus, Austen, while the 

 dorsum of the third abdominal segment is partly tawny 

 ochraceous instead of entirely black. On this segment the 

 black area, indeed, consists of a median rhomboid spot, and 

 on each side a transverse band, which is in contact with the 

 anterior mai'gin of the segment only at its lateral edge. 

 The other characters, however, such as the short face and 

 proboscis, white instead of yellowish-white hair on the jowls 

 and basioccipital region, and the presence of a clove-brown 

 transverse band on the ventral scute of the third abdominal 

 segment, show that this specimen really belongs to D. ivoos- 

 nami, and prevent it from being regarded as an aberrant 

 example of D. compactus. The markings on the third abdo- 

 minal segment, the coloration of the hair on the jowls and 

 basioccipital region, and the absence of a tuft of black hair 

 on the mesopleume similarly distinguish the specimen from 

 D. fodiem, Austen. 



Genus Tabanus, Linn. 

 Tabanus sandersoni, sp. n. 



^ 9 . — Length, ^ (5 specimens) 13"-1 to 1-1*5 mm., ? [i 

 specimens) 13-2 to 16 mm. ; width of head, J 4'8 to 5*5 mm.. 

 ? 4*75 to 5"4 mm. ; width of front of $ at vertex 0*6 ram. ; 

 length of wing, c? 10-75 to 12-4 mm., ? 12-2 to 13-75 mm. 

 Medium-sized or smallish, dark brown or dark reddis/i-broivn 

 species, ivifh dorsum of abdomen marked with a median series 

 of pale triani/tes clutfied with short white {i/eltowish-wtiite or 

 greyish -white) hair, restinfj on similar hind borders to segments. 



