GLOSSINA TACHINOIDES IN NIGERIA. 43 



(Major C. B. Simonds, B.G.A.). German East Africa: 1 dried 

 larva, 3 pupa-cases, Amani, 1907 (Dr. F. Vosseler). South 

 Arabia : 1 9 , North Subaihi, between Nakil Madraga and the 

 Al Hay section of Subaihi, 1903 {Captain B. M. Garter, I.M.S.). 



The species under consideration is evidently very widely 

 distributed along the rivers and streams of Northern Nigeria. 

 In Katagum Province, in 1907, Dr. J. M. Dalziel, W.A.M.S., 

 found G. tachiiwides together with G. morsitans, Westw., to 

 be common in the region about Hadejia, and for some twenty 

 miles to the east. Six miles or so south of Mulgue, Bornu 

 Province, on July 22, 1910, Dr. Bernard Moiser, W.A.M.S., 

 found G. tacliinoides * along the course of a river-bed, the river 

 at that time " being represented by a series of detached pools, 

 surrounded by rank grass ; prickly thorns and a few tall, shady 

 trees grew on the banks, which were in some places twenty feet 

 high . . . The river runs north through Mulgue to Lake Alio, 

 about thirty miles away, whei-e lai'ge herds of cattle are annually 

 grazed." f 



In Nigeria it was found a few years ago by Mr. G. C. Dudgeon 

 that the areas of occurrence of G. tachinoides appeared to alter- 

 nate with those of G. palpalis. " In the lower Niger," writes 

 the author referred to, " as far up as Iddah, an almost black 

 form of G. palpalis is found, from Lokoja to Baro G. tachinoides 

 occurs commonly, from Egga (a few miles beyond Baro) to 

 Muraji (junction of Kaduna River) typical G. palpalis, and from 

 Muraji up the Kaduna to Dakmon G. tachinoides again was the 

 only species seen." J In Togoland, however. Dr. Zupitza met 

 with both species together on the Oti River (a large tributary of 

 the Volta), although "on the German bank of the Volta north 

 of 8° Glossina tachinoides was found and no palpalis," § In the 

 Western Province of Ashanti, in 1910, Dr. A. Kinghorn always 

 found G. tachinoides together with G. palpalis on the Tain and 

 Black Volta Rivers, the former species being the commoner ; 

 Dr. Kinghorn believes that both occur on the Yolta, " from its 

 mouth to the French border." || 



* Mixed with G. morsitans ; out of thirty specimens sent to the author 

 for identification, twenty-nine were G. tachinoides, and one was a G. 

 morsitans, Westw. 



t Dr. B. Moiser, in litt., 15. viii. 1910. 



X G. C. Dudgeon, " The Journal of Tropical Medicine," Vol. IX, 

 No. 21, p. 328 (November 1, 1906). 



§ Cf. Sleeping Sickness Bureau Bulletin, Vol. II, No. IG, p. 149 

 (April 11, 1910). 



II Ibid. Vol. II, No. 21, p. 380 (November 5, 1910). 



