13 



direction up to ten miles and more by the movements of animals 

 and human beings, but there is a marked tendency to return to their 

 place of origin. In accordance with accumulated evidence it is tenta- 

 tively suggested that the manner in which fly-belts extend is analogous 

 to that of a rising flood and not in the form of disconnected oflshoots 

 at a distance from the main belt, and should the hne of advance be 

 interrupted in regard to permanent shade, as in crossing a watershed, 

 the movement is confined to the wet season. The presence of larger 

 mannuals in considerable quantities and a large number of flies at the 

 previous dry season limit are essential for the crossing of a moderately 

 wide region affording only summer shade. 



Should these deductions prove correct the advance of the fly might 

 be checked by the clearing of a comparatively narrow strip of forest. 

 Experiments of this nature have been commenced in Southern Rhodesia 

 but have unavoidably been abandoned temporarily. 



Though direct experimental proof is still lacking, the evidence that 

 Trypanosoma peconim is commonly spread among domestic animals 

 in the absence of Glossina has further accumulated. 



Mac(tRegor (M. E.). On the Occurrence of Sfegomyia fasciata in a 

 Hole in a Beech Tree in Epping YoxQsi.^Bull. Entom. Research, 

 London, x, part 1, November 1919, p. 91. 



Mosquito larvae recently collected from a beech tree hole in Epping 

 Forest include : Anopheles plumbeus, Ochlerotatus geniculatus, Orthopo- 

 dornyia alhionensis and Stegomyia fasciata. The last-named is recorded 

 for the first time under natural conditions in England and attention 

 is drawTi to the possibihty of this species being indigenous, as it 

 occurred at a distance from human habitations. 



Sheep-Fly Investigation in New South WdXQS.— Science and Industry, 

 Melbourne, i, no. 5, September 1919, p. 269. 



The field work in connection with the sheep-fly investigations is 

 to be resumed in New South Wales on demonstrational lines. An 

 area of 10,000 acres is to be marked off in sections for this work, which 

 will include the hberation of Chalcid parasites \Nasonia brevicornis] and 

 demonstrations as to the efficacy of this means of control when used 

 in conjunction with fly-traps and the destruction of breeding-places 

 such as dead animals. 



Hewitt (C. G.). The Use of the Aeroplane in Entomological Work. — 



Agric. Gaz. Canada, Ottawa, vi, no. 10, October 1919, p. 877, 1 fig. 



This paper has been abstracted in R.A.E., A, viii, 10. 



Abbott (W. S.). Naphthalene vs. Chicken Lice.— J?. Econ. Entom., 

 Concord, N. H., xii, no. 5, October 1919, pp. 397-402. 



Experiments with naphthaline preparations as possible destroyers 

 of Menopon biseriatum, Pg., M. pallidum. Nit., Lipeurus heterographus, 

 Nit., and Goniocotes abdominalis, Pg., on chickens show that when 

 used as a dust containing 5 per cent, or less of naphthaline it is useless. 

 A powder containing 10 per cent, was very effective, but caused shght 

 injury to the fowls. The exact extent of the injury and its duration 



