166 PROCEEDINGS OF THE ROYAL SOCIETY OF QUEENSLAND. 



On the Larval and Pupal Stages of 

 Myzorhynchus bancrofti Giles, 1902/ 



By L. E. Cooling, A.R.San.I. 



{Read before the Royal Society of Queensland, 26th Sept., 1921.) 



This Anopheline was described by Giles^ in 1902, but 

 hitherto the eggs, larvae, and males have never been recognised. 



On Thursday, 12th May, 1921, during an inspection of 

 certain public health matters at some Chinese gardens in the 

 vicinity of Mott street, Rifle Range, near Brisbane, it was 

 deemed advisable to examine (for the presence of mosquito 

 larvae) the Avater of a creek hard by which was used by the 

 Chinamen for irrigating purposes during protracted spells of 

 droughty weather. The creek is in reality a tributary of 

 Kedron Brook, and, after fio"sving a rather tortuous though 

 short course, joins the Brook some 500 metres downstream. 



The creek was more or less stagnant, forasmuch as an 

 earthen dam had been thrown across the bed on the lower side, 

 as Chinamen are wont to do. The water, though kept stagnant, 

 was well aerated by an abundance of green Algae and other 

 aquatic vegetation. Manifestation of the oxygenation was to 

 be had in the extraordinary numbers of small fish Avith which 

 the water abounded, mostly of the species known as " Crimson- 

 spotted Sun-Fish" and " Firetail " {Rhombatractus fitzroyensis 

 Castelnau, and Austrogobio galii Ogilby, respectively). The 

 excessive growth of vegetation had to a great extent rendered 

 inert the activities of these mosquito-larvivorous fish, for 



' Since having written this paper I find that I have fallen into the 

 grave eri-or of overlooking a remark by F. H. Taylor in his " Report for 

 the Half-year ending December, 1914," made to the Institute of Tropical 

 Medicine and published in the half-yearly reports from 1st July to 31st 

 December, 1914, and from 1st January to 30th June, 1915, of that 

 Institute. In a batch of mosquitoes collected by an expedition to Port 

 Douglas, Taylor found "the male of Myzorhynchus barbirostris var. 

 bancrofti . . ." Cf. p. 10 I.e. 



~ Giles : A Handbook of Gnats or Mosquitoes (2nd ed.), p. 511, 1902. 



