12 



only rarely in collections of water in native compounds. Larvae of 

 C. ager var, efhiopicus, Edw., were only taken in swamp pools, and 

 those of Anopheles pretoriensis, Theo., in rock pools in association 

 with Stegomyia vitfata, Big. {sugens, Theo.). 



It is doubtful whether Stegomyia fasciata and other species of this 

 genus tide over the dry season in the Northern Territories by means 

 of eggs stranded in holes in trees. Owing to the absence of Culex 

 fatigans and the reported prevalence of filariasis due to Filaria bancrofti 

 some other species must be responsible for the transmission of this 

 parasite. 



PJilehotomus was found on the walls of most of the rest houses. 

 The washing of these with a a extract of a native tree {Parkia higlohosa) 

 probably reduces what would seem ideal breeding places for these 

 insects. CuUcoides grahami, Aust., is rare in the Northern Territories, 

 but it is apparently replaced bv a larger species, Forcipomyia ingrami, 

 Cart. 



Attention is drawn to the greater prevalence of S. fasciata during 

 and shortly after the close of the wet season and to the fact of yellow 

 fever occurring amongst Europeans between July and the end of 

 November, chiefly between September and November. 



A list of the blood-sucking insects taken in the Gold Coast Colony, 

 Ashanti and the Northern Territories is appended. 



Ingram (A.) & Macfie (J. W. 8.). The Early Stages of West African 

 Mosquitos.-iv. — BulL Entom. Research, London, x, part 1, Novem- 

 ber 1919, pp. 59-69, 7 figs. 



This paper, which is supplementary to previous ones on the same 

 subject [R.A.E., B., vi, 38], describes the larval and pupal stages of 

 the following species taken in the Gold Coast : — Anopheles pretoriensis, 

 Theo., captured in shallow pools in outcrops of quartzite, in association 

 with larvae of Stegomyia vittata, Big. ; A. rufipes, Gough, in clear 

 pools in the dry bed of a stream, with pupae of A. funestus ; Ochlero- 

 tatus hirsutus, Theo., in rain-water collected in an old tin among 

 vegetation ; 0. nigeriensis, Theo., in a borrow-pit containing muddy 

 water ; Ctdex ager, Giles, var. ethiojncus, Edw., found during June and 

 July in swamps or pools containing algae ; C. quasigelidvs, Theo., and 

 C. univittatus, Theo., taken in a grass-grown pool of clear water. 



Jack (R. W.). Tsetse Fly in Southern Rhodesia, 1918.— 5m ZZ. Ento^n. 

 Research, London, x, part 1, November 1919, pp. 71-90, 3 plates, 

 3 maps. 



The history and present situation of Glossina morsitans in Southern 

 Rhodesia with special reference to its relation to big game and the 

 breeding haunts is reviewed [R.A.E., B, ii, 95, iii, 7, iv, 117, v, 166, 

 vii, 9, 36 and 42]. All data collected tend to confirm the dependence of 

 this species on the presence of wild ungulates ; at least there is every 

 reason to beheve that the pest feeds upon them by preference and 

 thrives best in their presence. 



With regard to the explanation of fly-belts, observations show 

 that the dispersing range does not exceed two or three miles, but there 

 is no apparent reason for this hmited migration unless it be a definite 

 instinct to avoid wandering. The males may be carried in any 



