BY T. HARVEY JOHNSTON AND M. J. BANCROFT 131 



The flies bred out were determined ])y Dr. Ferguson 

 as Silvius notaius Ricardo, of which species he informed us 

 S. psarophanes Taylor is a synonym. 



As a result of our observations during the summer 

 1919-1920, the pupation period of the three species collected 

 was ascertained to l)e less than six weeks, with four weeks 

 as a possible maximum. Since these periods included an 

 unknown number of days spent in the larval stage, our 

 figures are merel}^ approximations. 



Davis (1919, p. 97, 99) reported that in the case of 

 Tabanus sulcifrons and T. atratus common species in the 

 eastern parts of the United States, the complete life cycle 

 occupied about a year, the larvae living through the winter 

 and pupating in early spring, the pupal stage occupying 

 about a month and a fortnight, respectivel}-, for the two 

 March flies mentioned. 



Hindle (1914, p. 228-30), stated that Tabanid larvae 

 in temperate countries live through the year, pupating 

 in the following spring, the whole life cycle occupying 

 eleven to twelve months, the pupal period being usually 

 three to four weeks. 



LITERATURE CITED. 



1919 — Davis, J. J. Contributions to a knowledge of the natural enemies 



of Phyllophaga. Bull. Nat. Hist. Survey Illinois, 13 (5), 



138 pp. 

 1919 — Ferguson, E. W. and Henry, M. Tabanida? from the Camden 



Haven district, N.S.W., etc. P.L.S., N.S.W., 44, 1919 (1920). 



pp. 828-849. 

 1911 — Froggatt, W. W. March Flies. Science Bull. No. 3, Dept. Agric. 



N.S.W., Sept. 1911, 16 pp. 



1914 — Hindle, E. Flies and Diseases. Bloodsucking flies. Cambr 

 Univ. J'ress. 



1920— Johnston, T. H. and Bancroft, M. J. Ex])eriments with certain 

 Di2)tera as possible transmitters of bovine Onchocerciasis, 

 P.R.S. Q'land., 32, pp. 31-57. 



1916 — Taylor, F. H. Australian Tabanidae ii. P.L.S., N.S.W.f 41, 1916 

 (1917). pp. 746-762. 



