143 



The seasonal prevalence of relapsing fever in India is thus explained 

 bv the reaction of the insect host of the spirochaete to a varying 

 climate, the occurrence of epidemics being due to abnormal seasonal 

 conditions. The absence of typhus suggests a curious phenomenon 

 —that two diseases with the same insect vector have an entirely 

 different seasonal prevalence and distribution within the borders of 

 the same country. There is, however, the possibility that it has been 

 present without being recognised. 



Austen (E. E). Note on a Small Collection of Indian Tabanidae and 

 other Blood-sucking- Diptera.— Trans. R. Soc. Trop. Med.S- Hyg., 

 London, xv, no. 8, 16th February 1922, p. 264. 



The species recorded are :— The Tabanids, Tahanus striatus, F., 

 T macer, Big. (hicallosus, Ric, trichinopolis, Ric), T. dUaeniatus, Y 



Macq., T. albimedius, Wlk., T. consoaus, Wlk., T. nemocallosus, \ 



Ric, and T. virgo, Wied.; the Muscids, Philaematomyia crassirostris, ^ 

 Stein {insignis, Aust.), Stomoyxs calcitrans, L., and Lyperosia exigita^ 

 de Meij. ; and the Hippoboscids^' //?>j!>o&os(:fl macidata, Leach, and 

 Lipoptena caprina, Aust. The last-named has hitherto only been 

 recorded from goats in Palestine. ^ 



This collection also includes one species of Haematopota, two oi 

 Tahanus and one of Stomoxys that are probably new. 



Parker (R. R.). Australian Sarcophagidae ; New Species and Data 

 concerning others (DivtevB,).— Canadian Ent., Orillia, liv, no. 1, 

 January 1922, pp. 4-9, 1 fig. 



The species dealt with include Sarcophaga froggatti, Taylor, of which 

 a further description is given [R.A.E., B, v, 541. This sheep-infestmg 

 species has also been recorded from the Northern Territory. 



Froggatt (W. W.). Sheep-maggot Flies. No. 5.— A'.S.H'. Dept. 

 Agric, Sydney, Farmers' Bull. 144, ^larch 1922, 32 pp., 10 figs. 



The various methods of controlhng sheep-maggot flies by means of 

 parasites, natural enemies, the destruction of breeding-places, trappmg, 

 spraving, dipping, crutching, dressing and jetting are described. An 

 arsenical solution recommended for dressing blown sheep consists of 

 21b. white arsenic, 23 oz. washing soda or 6 oz. caustic soda, 21b. soap 

 and 100 gals, water. If washing soda is used with the arsenic, they 

 should be boiled together in a gallon of water until dissolved, and the 

 soap shced up and boiled in another gallon. The two solutions can then 

 be mixed and made up to the 100 gals. If caustic soda is used, 

 it does not require to be boiled with the arsenic, and after being mixed 

 in a gallon of water, they can be added to the soap solution obtained 

 as described above, and water added to makeup 100 gals. An arsenical 

 oil emulsion consists of 25 gals, water, 25 gals, oil, 101b. soap, 1 lb. 

 white arsenic or If lb. sodium arsenite, and 12 oz. washmg soda or 

 3 oz. caustic soda. The soap should be dissolved in 5 gals, of water 

 by boihng, and the white arsenic or sodium arsenite dissolved m a 

 gallon of water as described in the previous formula and added to the 

 soap mixture. The solution should then be poured into a vessel 

 containing 25 gals, oil until a perfect emulsion is obtained. The 

 mixture is readv for use after adding 19 gals, warm water. If left to 

 get cold, the mixture forms a jelly, but does not deteriorate and is 

 restored by thorough stirring. For jetting, a mixture of 1 lb. arsenic 



