BIONOMICS OF GLOSSINA TACHIXOIDES. 45 



after dark. At 7.0 p.m. he had to take refuge in his mos(iuito 

 net, and his boys remarked that the flies were more troublesome 

 than mosquitoes." '"' Brumpt,t writing of this species under its 

 synonym G. decorsei, says that in the Shari Eiver basin and on 

 the shores of Lake Chad, where the natives associate the bite of 

 the fly with disease among their cattle, it appears to be confined 

 to the water's edge, and that in' the month of March the males 

 are more numerous than the females. According to Brumpt, 

 the bite of G. tachinoides " is disagreeable, as is that of all the 

 species of Glossina, but not very painful ; it causes some time 

 after the bite a rather acute itching."' 



In Central Dahomey, according to Roubaud,J G. tachinoides 

 is a migratory species, which comes from the north, and " is 

 present in abundance on the banks of the large watercourses only 

 from May to August, when the rains are at their height and 

 considerable changes in the river-systems take place. Its habitat 

 is the same as that of G. palpalis, though it displays a preference 

 for moi-e open wooded tracts, and is not found in the groves of 

 wild palms along the small streams." Roubaud states that in 

 Dahomey during the wet season, when the air is saturated with 

 moisture, G. tachinoides, paljjcdis, and Jongipalpis are all found 

 beyond the limits of their usual haunts, and isolated specimens 

 may be met with in the savannah zone, far from any watercourse. 



On the Wobe River, North Bornu, Northern Nigeria, 

 Dr. G. J. Pirie, in November, 1909, found G. tachinoides 

 *' restricted to patches sometimes on one bank, sometimes on the 

 other. ' The fly patches always occurred where the main river 

 stream came right up to its bank, and the bank at the patches 

 was covered with river bush with thick undergrowth. At one 

 or two places the ' fly ' came ofl" to the barge in numbers, but 

 were very ditficult to catch. Where the river bush was thin, no 

 fly was seen.' No evidence of trypanosomiasis in man or animals 

 could be obtained." § At Bebua, Bauchi Province, Northern 

 Nigeria, where, as already mentioned. Dr. J. McFarlane Pollard 

 found G. tachinoides " in far greater numbers than G. palpalis 

 on the Bade River (a small stream) and its little tributaries," 



* Sleeping Sickness Bureau Bulletin, Vol. Ill, No. 24, pp. 92, 93 

 (February 15, 1911). 



t Brumpt, loc. cit. p. 629. 



X Comptes Rendus de TAcademie des Sciences, T. 152, No. 7, p. 406 

 (Fevrier 13, 1911). 



§ Sleeping Sickness Bureau Bulletin, Vol. II, No. 16, pp. 146-147 

 (April 11, 1910). 



