Observations on the bionomics and comparative prevalence of the vectors of yellow fever and other domestic mosquitoes of West Africa, and the epidemiological significance of seasonal variations

Studies on the Abundance, Distribution and Feeding Habits of some West African Mosquitos

“…On the other hand, in an extensive series of house captures of adult mosquitos made in 1930-31 in the four largest cities of Nigeria, not a single adult of either of these species was taken. 1 In a series of house captures which we made in the suburbs of Lagos, neither species was included among 15,439 adult mosquitos taken, and in another series of house captures, made in the village of Mushin in houses close to Stations M4 and M7, where very large numbers of both species were taken out-of-doors, not a single mosquito of either species was obtained. In addition, in 249 daytime house captures made by the late Dr. T. B. Hayne* in small native villages in the vicinity of Lagos, all closely surrounded by bush in which there was known to be a heavy production of both species, no A. africanus and only two A. luteocephalus were found among a total of 14,554 adults taken (Table I).…”

Mosquito‐borne disease problems In reply to: The urbanization of tropical countries

“…fatigans was far more commonly taken than any Anopheles species in Indoor catches; its population showed a peak density in the dry months of the year when presumably the sewage drains in which it mainly breeds are longer flushed by the heavy rains. In contrast, a survey carried out in Ibadan almost 40 years earlier (Beeuwkes et al, 1933) showed C.p. fatigans as representing only 0.7% of the total adult mosquitos captured at that time when the human population of the city was about 387,000.…”

General Observations on Mosquitos in relation to Yellow Fever in the Anglo-Egyptian Sudan

“…Beeuwkes and others (1933) found it in houses in Kano, and Philip (1930) in Lagos, but in the former the number per house was small and in both cases there were breeding places nearby. Kerr (1933) found that at Lagos the adults were most abundant near swamps and equally abundant inside and outside houses. These accounts do not appear to show that the habits of T. africanus in the Sudan differ from those of the West African representative.…”

“…Edwards (1941) stated that none of the African species of this genus had been observed to suck human blood, and the writer has spent considerable periods in areas where U. balfouri was abundant without seeing any biting. Kerr (1933) found species of Uranotaenia on man, and Davis & Philip (1931) identified chicken blood in U. annulata. Further observations on U. balfouri are desirable.…”