196 



auratus, were made in rice-fields and it was found that the high temper- 

 ature and abundant food-supply, occasioned by the presence of the 

 mosquito lai-\'ae, caused a rapid multiplication. In one instance 1,300 

 fish increased to 18,000 in 5 months. 



Four d^truire les moustiques dans les riziferes. [The destruction of 

 mosquitos in rice-fields.] — La Vie Agric. et Rur, Paris, vi, no. 43,. 

 21st October 1916, p. 312. 

 This article deals with the same subject-matter as the one abstracted 



above. 



Ferris (G. F.). Anoplura from Sea-Lions of the Pacific Ocean.— 



— Entom. News, Philadelphia, xxvii, no. 8, October 1916,, 



pp. 366-370, 1 fig. 

 This paper records Antarctophthirius microchir, Troues. & Neum.,. 

 from Zalophus caUfornianus (Calif ornian sea-lion) and Echinophthirius 

 fluctus, sp. n, from a skin of what is probably a young Eainetopias 

 jubata (Stellar sea-lion). 



Cleland (J. B.), Bradley (B.) & McDonald (W.). On the Trans- 

 mission of Australian Dengue by the Mosquito Stegomyia jasciata.. 

 — Med. Jl. Australia, Sydney, ii, nos. 10-11, 2nd & 9th 

 September 1916, pp. 179-184 & 200-205, 1 coloured plate. 



The extension of the epidemic of dengue from Queensland to some of 

 the North Coast towns of New South Wales early in 1916 has led to 

 an investigation of the aetiology of this disease, and the results of 

 certain experiments are published in this preliminary paper, showing 

 that Stegomyia fasciata (yellow fever mosquito) transmits it. Previous 

 work bearing on the experimental production of dengue fever by 

 mosquitos is reviewed, including that by Graham, Bancroft and 

 Ashburn and Craig. The first series of experiments by the present 

 authors are not described in detail here, as negative results were- 

 obtained. In the secon'd series, mosquitos were collected in Mullum- 

 bimby and the surrounding district, about 100 S. fasciata and 112 

 Culex fatigans being obtained. Occasional examples of Cidex annuli- 

 rostris were found in Mullumbimby, but, except in one instance,, 

 they were not used in the experiments. A summary of these is 

 given, taking the nine persons volunteering seriati7n, with a detailed 

 history of the four successful cases. The authors' conclusions 

 are as follows : — (1) Stegomyia fasciata caught in a dengue-infected 

 district, some of which were known to have fed on a dengue 

 patient on the first and second day of his illness, when transported to 

 a non-dengue district, reproduced the desease in four out of seven, 

 persons on whom experiments were conducted. (2) Blood taken 

 from three of these four cases reproduced the disease when injected 

 into other persons; the blood in the fourth case was not tested. 

 (3) The incubation period of the four cases was found to be possibly 

 between 5 and 9| days, probably between 6| and 9| days, reckoning 

 from the bite to the definite onset of the disease. (4) No known 

 case of contagion occurred from any of the above four cases. (5) No 

 evidence was obtained from two cases, one of which was heavily and 

 repeatedly bitten with Cidex fatigans, that this mosquito is capable of 

 acting as a transmitter of dengue fever. 



