30 



Eiver and somewhat to the north of the Belgian Congo, where sleeping 

 sickness extends up to 7° N. Sleeping sickness is endemic in the 

 Bahr Sara valley, but it is uncertain whether it is of the same type as 

 in the Belgian Congo and in Ubangi. Up to the present, Glossina 

 palpalis has not been found, only G. morsitans and G. tachinoides 

 having been seen. Only horses and goats are to be found near Fort 

 Archambault, though in the Chad region to the north, cattle, sheep, 

 goats and horses are the chief sources of wealth. The only form of 

 trypanosomiasis as yet found in horses in the district appears to be 

 due to Trypanosoma pecaudi, though T. cazalboui has been observed 

 in two donkeys. 



Knab (F.) & BuscK (A.). Mosquitoes and sewage disposal.— ^mer. Jl. 

 Trap. Dis. Prev. Med., New Orleans, ii, no. 5, November 1914, 

 pp. 333-338. 



Cnlex pipiens, C. quinquefasciatus and certain other species of 

 mosquitos multiply most rapidly in the presence of highly polluted 

 water. In this paper, details are given of a striking case where 

 modern contrivances for sewage disposal, designed to safeguard 

 the health and comfort of the community, have brought about ex- 

 cessive multiplication of mosquitos. The system in question is based 

 upon the employment of a limited amount of piping and a small water 

 supply and aims at the bacterial reduction of the sewage. One method 

 includes the use of screen w^ells, cesspits and disposal fields ; the 

 second culminates in a large Imhof tank ; in the third the tank is 

 roofed over, the cover being provided with manholes in which are 

 placed ventholes, through which the mosquitos gain access to the 

 sewage below. In the latter case, oil application is impossible because 

 of a considerable current at the surface of the liquid contents ; the 

 appKcation of a miscible larvicide would arrest the bacterial reduction 

 process. 



Taylor (F. H.). Report of Entomological Department. — Australian 

 Inst. Trop. Med., Townsville, Queensland, Half-Yrly. Rpt., 1st 

 January-30th June 1914, pp. 11-13. 



Anopheles (Nyssorhynclms) annulipes, Walk., Sfegomyia fasciata, F., 

 and Culex fatigans, Wied., are widely distributed throughout the 

 Northern Territory; these species also occur in Queensland. S. 

 scutellaris, Walk., has been discovered in Port Darwin, this being the 

 first record of this species on the mainland of Australia. At Melville 

 Island, a new species of Stegomyia has been taken. Four new species 

 of mosquitos are included in a collection from Tasmania, where A. 

 annulipes is also found, though it would appear to be comparatively 

 rare. Two new species, OcMerotatus (Culicada) fergusoni and Culex 

 hiocellatus, have been received from the Bureau of Microbiology, 

 Sydney. A. annulipes and C. fatiqam from Melbourne and a new 

 species from Central Queensland, Ochlerotaius {Culicada) victoriensis 

 are noted. 



