﻿330 ERNEST E. AUSTEN — NEW AFRICAN 



again it fails to extend so far as the middle of the second segment ; in any case 

 the blotch, which is broad and quadrate on the first segment and may be 

 indistinctly interrupted just before reaching the hind margin of this segment, is 

 much narrower on the second segment and narrower still on the third, so that the 

 lateral margins of the blotch are not straight but have an indented appearance ; 

 in many specimens the blotch is strongly constricted or even interrupted just 

 before reaching the hind margin of the second segment : in one of the para-types 

 examined, in which the main blotch terminates on the third segment, at a point 

 three-fourths of the length of the segment from the base, there is also a small 

 dark median spot at the base of the fourth tergite. Wings nearly hyaline, or 

 faintly tinged with buff on proximal two-thirds ; costal cells buff; veins mainly 

 orange-buff, costa darker, distal extremities of veins light mummy-brown ; stigma 

 ochre-yellow, sometimes but slightly developed. Squamae cream-buff. Halteres : 

 knobs buff, stalks ochraceous-buff, sometimes paler. Legs : front coxae buff, 

 clothed with yellowish pollen and long yellowish hair, middle and hind coxae 

 usually darker, yellowish pollinose and clothed with shorter yellowish hair, front 

 coxae sometimes as dark as pectus ; front femora and tibiae, and femora, tibiae, 

 and tarsi of middle and hind legs ochraceous, tips of front tibiae and of joints of 

 middle and hind tarsi dark brown or brownish ; third and fourth joints of front 

 tarsi somewhat expanded. 



North-Eastern Rhodesia : type and nine para-types from the eastern 

 shores of Lake Bangweolo, between Luwingu and the mouth of the Chambezi 

 River, alt. 3,900 ft., 5- 17.x. 1908 (S. A. Neave) ; an additional specimen from the 

 Upper Kalungwisi Valley, alt. 4,200 ft., 8.ix.l908 (S. A. Neave) ; another 

 example from the Kasama District, October 1904 (R. L. Harger). The type, 

 five of the para-types, and the specimen from the Upper Kalungwisi Valley have 

 generously been presented to the National Collection by Mr. Neave ; the 

 remaining para-types are in the Oxford University Museum. 



Plastic differences in the case of the new species described above and its near 

 ally Tahanus par, Walk., are difficult to discover : as a rule, however, the 

 expanded portion of the third joint of the antennae (measured across its widest 

 part) is, at least in proportion to its length, distinctly broader in T. medio not at as 

 than in T. pa?-. 



Tabanus neavei, sp. n. (Plate X, fig. 5). 



3 Q. — Length, 3 (15 specimens) 12*25 to 14*25 mm., Q (22 specimens) 12*75 

 to 15 mm. ; width of head, c? 5 to 5' 5 mm., Q 4*6 to 5*25 mm. ; width of front 

 of Q at vertex 0*5 to 0*6 mm. ; length of wing, $ 11 to 13 mm., Q 11*6 to 

 13 mm. 



Medium-sized, clove-brown or black species, with very conspicuous light-grey or 

 whitish markings on dorsum of thorax and abdomen ; thoracic markings including 

 a pair of short admedian longitudinal stripes, which, commencing on front margin, 

 terminate abruptly just beyond transverse suture. — Closely allied to and resembling 

 T. insignis, Lw., but distinguished, inter alia, by usually more elongate shape of 

 expanded portion of third joint of antennae, by angle on upper margin of latter 

 being less prominent, by more dusky hue of terminal joint of palpi, by markings 

 on tergite of second abdominal segment consisting normally of a large oblique 



