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NEW AFRICAN TABANIDAE.— Part II.* 



By Ernest E. Austen. 

 (Published by permission of the Trustees of the British Museum.) 



TABANINAE. 

 Genus Tabanus, L. 



Tabanus medionotatus, sp. n. 



Q. — Length (12 specimens) 9*5 to 12 mm.; width of head 3*5 to 4*4 mm. ; 

 width of front at vertex just under # 5 to just under 0*6 mm. ; length of wing 

 7*75 to 9*8 mm. 



Small species, in size and general coloration agreeing with Tabanus par, Walk., 

 but distinguishable owing to the presence of a dark, elongate, median blotch on the 

 proximal half or at the base of the dorsal surface of the abdomen ; front tarsi dark 

 brown, first and second joints sometimes paler at base. 



Head : front, subcallus, and sides of face raw-sienna-coloured f pollinose, face 

 (except sides), jowls, and basioccipital region yellowish-grey pollinose, clothed 

 with cream-buff or ochraceous-buff hair ; occiput yellowish olive-grey pollinose ; 

 front somewhat narrow, inner margins of eyes bordering it converging slightly 

 below, sometimes almost parallel ; frontal callus raw-umber-coloured, cuneate, its 

 upper extremity produced into a median ridge ; palpi ochraceous-buff or buff, 

 proximal joint clothed with yellowish hair, terminal joint moderately swollen at 

 base, clothed on outer side with minute, appressed, glistening, buff-yellow hairs, 

 usually mixed with minute, appressed, black hairs ; first and second joints of 

 antennae ochraceous-buff, clothed above with minute black hairs, third joint 

 ochraceous, tawny-ochraceous, or tawny, expanded portion short and broad, 

 annulate portion sometimes brownish at distal extremity. Thorax : dorsum 

 unstriped, ground-colour black, clothed with olivaceous pollen and short 

 yellowish hairs, with which longer blackish hairs are intermixed ; humeral 

 calli, swelling in depression at each end of transverse suture, a small area 

 between this swelling and postalar callus on each side, and upper extremity of 

 mesopleurae greyish pinkish-buff, clothed with yellowish hair, which on swelling 

 at each end of transverse suture is mixed with black hair ; pectus and pleurae 

 (except upper extremity of mesopleurae) agreeing with dorsum in coloration and 

 pollinose covering, and clothed with pale yellowish hair. Abdomen tawny, 

 clothed above and below with minute, appressed, yellowish hairs, which on upper 

 surface are mixed with minute black hairs ; upper surface at base with an 

 elongate, greyish clove-brown, median blotch, exhibiting varying degrees of 

 development in different individuals, and when most fully developed extending 

 from base of first segment nearly to hind margin of third ; in other specimens the 

 blotch does not quite reach to the middle of the third segment, while in others 



* For Part I see Bull. Ent. Res., Vol. Ill, Part 2, p. 113 (August, 1912). 

 f For names and illustrations of colours, see Ridgway, " A Nomenclature of Colors for 

 Naturalists" (Boston: Little, Brown & Company, 1886). 



