207 



Ferguson (E. W.)- Notes on Mosquitoes.— i^ejof. of the Director-General 

 of Public Health, Neiv South Wales, for the year 1913, Sydney, 

 1915, pp. 238-240. 



During the year attention was paid to the collection and identification 

 of mosquitos. Ochlerotatus {Scutonujia) notoscripta was the commonest 

 species during early summer, while in the hottest months 0. (Cidicelsa) 

 vigilax was abundant. Anopheles (Nyssorhynchus) annuUpes, Walk., 

 was found in several localities, being particularly numerous near the 

 Murray River. The following species were also obtained •.—Mucidus 

 alternans, Westw. ; Stegomyia fasckda, F. ; Ochlerotatus {Culex) 

 australis, Er. ; 0. (C.) rubrithorax, Macq. ; 0. (C.) occidentalis, Skuse ; 

 0. (Cidicelsa) alboanmdatus, Macq. ; 0. {Culicada) vittiger, Skuse ; 

 0. (C.) fergusoni, Taylor ; 0. (C.) clelandi, Taylor ; 0. {Grabhamia) 

 theobald'i, Taylor ; Coenocephalus concolor, Taylor ; Culex fatigans, 

 Wied. ; C. tigripes, Grp. ; C. biocellatus, Taylor ; G. sitiens, Wied. 

 {Cidicelsa annulirostris, Skuse) and C. {Cidicelsa) linealis, Skuse. 



Cleland (J. B.). Prevalence of Domestic Flies in the Lower Hawkes- 

 bury River District, New South Wales.— T/mtZ Rept. of the 

 Government Bureau of Microbiology,' for the year 1912, Sydney, 

 1914, pp. 155-160, 1 table. 



During part of 1911 and the whole of 1912, counts were made at 

 the Milson Island Experiment Station in order to determine the 

 relative prevalence at different periods of the year of various species 

 of domestic flies. It was found that Fannia canicidaris was relatively 

 more abundant in September and October than Musca domestica. 

 It seemed to diminish both relatively and numerically from December 

 onwards through the summer, autunui and winter months. 

 M. domestica began to appear at the end of October, but did not 

 increase markedly until June. It appeared to vary numerically a 

 good deal from undetermined factors almost from day to day in some 

 months. Its actual numbers were dependent on the proximity of 

 suitable breeding places, which fact might perhaps account for the 

 great variations. The results of the counts are given in tabular form. 



Cleland (J. B). Further Investigations into the Etiology of Worm- 

 nests in Cattle, due to Onchocerca gibsoni.— Third Rept. of tJie 

 Government Bureau of Microbiology, for the year 1912, Sydney, 

 1914, pp. 135-153, 5 plates, 3 tables. 



In 1910-11, researches carried on by the author led him to the 

 conclusion that Stomoxys calcitrans was in all probability the carrier 

 of Onchocerca gibsoni from one bovine host to the next. Though this 

 point is not as yet definitely decided, certain important results have 

 been obtained. These are :— (1) various Muscidae, as well as mos- 

 quitos, can ingest embryos of 0. gibsoni when given access to a 

 freshly-opened nodule ; (2) in the case of S. calcitrans, embryos can 

 be ingested and remain alive within the alimentary canal of this 

 insect for 3 days, while they have not been detected alive in 31usca 

 domestica and M. vetustissima after 24 hours ; (3) the depth at which 



