NOTES ON THE NOMENCLATURE OF CERTAIN AFRICAN TABANIDAE. 145 



on one or more of fourth and following segments. Wings : appendix to anterior 

 branch of third longitudinal vein, though of variable length, as a rule relatively 

 somewhat long. Squamae Isabella-coloured. Halteres mummy-brown, knobs 

 in $ often paler (cream-bufE) at tip. Legs : front coxae neutral grey, clothed with 

 cream-coloured or cream-buff hair, middle and hind coxae deep neutral grey or 

 dark neutral grey, clothed with black hair, hind coxae in $ also with some yellowish 

 hairs ; hind femora in (^ and bases of front and middle femora in same sex blackish 

 brown, front and middle femora in (J except at base russet-brown or cinnamon- 

 brown, all femora in ^ clothed with black hair, femora in $ paler, and clothed 

 largely with ochraceous buff or ochreous hair as well as with black hair ; coloration 

 of tibiae and tarsi and of their hairy covering alike in both sexes, front and middle 

 tibiae ochraceous buff or ochraceous tawny, clothed with minute, appressed glisten- 

 ing ochraceous buff hair, hind tibiae and hind tarsi blackish brown, clothed with 

 black hair, tips of second and two following tarsal joints clothed below with 

 ferruginous hair, similarly coloured hair also largely present, at least in $, on under 

 side of first tarsal joint, front and middle tarsi ochraceous tawny, clothed above 

 with black hair, last joint in each case, as well as distal extremities of preceding 

 joints mummy-brown, processes at tips of first and second joints of front tarsi in 

 ^ of moderate size, in neither case reaching distal extremity of following joint. 



Belgian Congo (North Katanga) and Tanganyika Territory. Typical series 

 from Kakanu (between 15 and 16 miles south of Kisengwa, R. Lomami), N. Katanga, 

 vi. 1918 {Dr. J. Schwetz). Type of ^, type of $, 36 (J and 2 $ para-types, in Musee 

 Royal d'Histoire Naturelle de Belgique (Brussels) ; 6 (J and 6 $ para-types, in 

 British Museum (Natural History) — presented by M. G. Severin ; 1 $, from Tangan- 

 yika Territory (formerly German East Africa), 30° 55' E. Long., 2° 5' S. Lat., 

 16. vi. 1916 {Dr. G. D. H. Carpenter), in British Museum (Natural History), presented 

 by Imperial Bureau of Entomology. 



This fine species, with which the author has much pleasure in connecting the 

 name of its discoverer (the well-known student of tsetse-fly bionomics in North 

 Katanga), was met with by the investigator in question in large numbers in the 

 vicinity of Kakanu.* On 6th June 1918, in a belt of forest several hundred metres 

 in breadth and about 3| miles from Kakanu, Dr. Schwetz's native carriers succeeded 

 in catching some 2,000 specimens of C. scJiwetzi, from 80 to 90 per cent- of which 

 were males. j" Unlike Corizoneura inornata, Austen (see below), which is found 

 in the open, C. schwetzi does not occur outside the forest. According to Dr. Schwetz, J 

 in the case of the present and the following species {C. inornata, Austen) at least, the 

 labium itself is the piercing organ, and in the act of biting is thrust by the insect 

 deeply into the skin of its victim. It is therefore interesting and possibly suggestive 

 to note that, in the $ taken by Dr. Carpenter in Tanganyika Territory, the labium 



* Gf. Schwetz, '^ Dix Jours d' Observations sur les Moeurs de la ' Pangonia zonata ' 

 et de la ' Pangonia oldii ' (Deuxieme Note)" : Bevue Zoologique Africaine, Yn,i^ip. 92-106 

 (1919). — Gf. also the earlier paper by the same author, " Quelques Observations Pre- 

 liminaires sur les Moeurs de la ' Pangonia zonata ' " : ibid., pp. 46-54. In both of the 

 memoirs cited Gorizoneura schwetzi is referred to as Pangonia oldii, while the species 

 termed Pangonia zonata is really Gorizoneura inornata, Austen. 



t Gf. Schwetz, loG. cit., p. 103. 



% See below, p. 147. 



>(687) d2 



