250 SIR RUBERT BOYCE THE PREVALENCE, DISTRIBUTION AND 



500 receptacles capable o£ holding water, and in most instances water was 

 present. Larv?e were found in 88 houses, distributed amongst 174 recep- 

 tacles out of tlie 500 potential water-containers ; reckoning, however, that 

 88 houses out of 200 were fonnd harbouring larvse, the percentage works 

 out as 44 per cent. The streets examined by me were Circular Road, 

 Regent and Goodrich Streets, Wilberforce Street, Fourah Bay Road, Howe 

 Street, Charlotte Street, Little East Street, Charles Street and Kissy Street. 

 When I made my inspection of Freetown several previous cleanings up of 

 the town had already been made, and innumerable odds and ends removed. 

 Moreover, as there is a pipe-borne water supply the necessity for barrels and 

 water receptacles is greatly diminished. Nevertheless, as the survey shows, 

 there w^ere yet numbers of unnecessary water-containers and wells which 

 are worse than useless. The larvse were in almost all cases those of the 

 Stegomyia ; whenever I was in doubt, I took samples to my office to hatch 

 ■out. Mr. Newstead, to whom I brought back the adults for corroboration, 

 informs me that the 129 specimens were all Stegomyia fasciata, with the 

 exception of two specimens of Culex pruinosus. After examining another 

 series of adult mosquitos bred by Dr. J. Gr. Wood, of Freetown, from larviie 

 collected in odd receptacles, Mr. Newstead reports as follows : — 



Kroobay, Freetown, in rock pool, 31.viii.l0 : — 



3 specimens of Stegomyia sugens, Wied. 

 Pulteney Street, Freetown, in cask, 25.viii.10 : — 



2 specimens of Stegomyia fasciata, Fab. 



Vals Showrooms, Water Street, Freetown, 27.viii.10, in old tank : — 



3 Stegomyia fasciata, Fab. 



Dundas Street, Freetown, in tin and rock pool, 24.viii.10: — 



3 Stegomyia fasciata^ Fab. 

 George Street, off Upper Brook Street, 14.viii.l0 : — 



1 specimen destroyed, 1 Stegomyia fasciata. 

 Percival Street, in tin, 25.viii.10 : — 



2 Stegomyia fasciata.^ Fab., 2 specimens destroyed. 

 Waterloo Street, in foul tin, 26.viii.10 : — 



3 Stegomyia fasciata^ Fab. 



As the result of the examination of a third series sent by Dr. J. G. 

 W^ood, Mr. Newstead reports : — 



John Lane, Freetown, outskirts, in pool, O.ix.lO : — 



3 Culex inveiuistus, Theo. 

 Fergusson Street, Freetown, in rock pool, 7.ix.lO : — 



1 Fyretoplioriis costalis, Loew. 

 Ascension Town, Freetown, in pot, lO.ix.lO : — 



1 Stegomyia africana, Theo. 



