219 



and the nature and character of Anopheline breeding places discovered 

 are described. Anopheline larvae were found in almost all waters 

 where the visible vegetation was grass or algae, the predominant 

 species being Anopheles macidipennis. With the exception of the 

 districts of Moulle and Arques the infestation appears to be very 

 low in comparison with conditions in sub-tropical countries. A 

 malaria epidemic is considered unlikely in this area. Owing to the 

 nature and character of the infested waters, they are amenable to 

 treatment by dragging of weeds and oiling, and the control of 

 Anophelines should not be difficult. 



Warburton (C). Sarcoptic Scabies in Man and Animals. A Critical 

 Survey of our Present Knowledge regarding the Acari concerned. 



—Parasitology, Cambridge, xii, no. 3, September 1920, pp. 265- 

 300, 1 plate, 10 figs. 



The object of this paper is to collate and present the work of previous 

 authors in a compact form, and to indicate clearly the chief discre- 

 pancies involved. The urgent and immediate need for clearing up 

 the confusion that exists with regard to the species and varieties of the 

 geims ■ Sarcoptes is emphasised. Detailed descriptions are given of 

 Sarcoptes scabiei and of its various forms so far as they are known. It 

 is suggested that one form should be completely studied so that dif- 

 ferences of structure in others thought to be distinct from it may be 

 clearly recognised. The form known as equi is suggested for this 

 purpose, as it is easily obtainable and its saUent characteristics are 

 apparently more strongly marked than in the human form, details 

 of the life-history of which in man are given. 



Metz (C. W.). On the Possibilities of using Mosquito Traps in Anti^ 

 malaria Work.— U.S. Public Health Repts., Washington, D.C., 

 XXXV, no. 34, 20th August 1920, pp. 1974-1977, 3 figs. 



Draining, oihng and screening operations for the eradication of mos- 

 quitos are not practicable in many rural districts of the United States. 

 During 1918 observations were made with a view to finding an effective 

 trap or poison for use under such conditions. Unfortunately these 

 investigations were not completed, but the results obtained point to 

 the probable efficacy of such a method and the advisabihty of inves- 

 tigating the subject further. Small pig-styes, the construction of 

 which is described and illustrated, proved the most effective trap that 

 has as yet been tried. 



It is evident that Anophelines react sufficiently to some stimuh to 

 be enticed into traps, and under the conditions of this experiment, 

 the traps— which were in the nature of small pens containing pigs — 

 served to keep neighbouring buildings practically free from mosquitos. 

 It is suggested that a careful study should be made of the sensory 

 reactions of Anophelines, combined with chemical analyses and experi- 

 ments with a view to discovering a substance that will prove sufficiently 

 attractive to the mosquitos, and at the same time abohsh the use of 

 living animals in the traps. 



