214 



a blood-meal. On an average one hundred eggs are laid. After 

 20-25 days, according to the temperature, a six-legged larva hatches, 

 and there are three eight-legged nymphal stages. 



NoLLER (W.). Die Behandlung der Pferderaude mit Schwefeldioxyd. 



[The Treatment of Horse Mange with Sulphur Dioxide.] — Berlin, 



Verlag R. Schoetz, 1919, 63 pp., 11 figs., etc. Price M. 3-60. 



(Notice in Zeitsclir. angci0. Ent., Berlin, viii, no. 1, September 



1921, pp. 225-226). 

 As a result of experience gained in treating 70,000 horses this book 

 gives a considerable amount of information on the subject of fumigation 

 with sulphur dioxide against mange. The qualities and action of 

 sulphur dioxide (SOg), the practical details of fumigation and the 

 merits of the various forms of gas chambers are discussed For 

 fumigation to be successful the temperature should not be below 68° F., 

 as the mites breathe very little at low temperatures and thus escape the 

 action of the gas, nor should it- be above 104° F. , or the horses will sweat. 



Megaw (J. W. D.). A Typhus-like Fever in India, possibly trans- 

 mitted by Ticks.— /«c/. Med. Gaz., Calcutta, Ivi, no. 10, October 

 1921, pp. 361-371. 

 The first part of this paper consists of a summary of a report by 

 Lieut. -Col. McKechnie of a fever studied by him in the districts of 

 Sat Tal and Bhim Tal (small hill stations at a height of some 4,500 ft. 

 in the Kumaon Division). After studying a number of cases, he was 

 forced to the conclusion that the disease in question was typhus. 

 From McKechnie's observations and his own experiences the author 

 is quite convinced that the fever belongs to the typhus group, and 

 discusses the possibilities of ticks or lice being the carriers. Points 

 in favour of the tick hypothesis are that in two of the cases in the 

 author's experience there was a tick bite previous to the attack ; 

 that the fever very closely resembles Rocky Mountain fever, which 

 is known to be tick-borne ; that in all the cases reported in India 

 tick bites might quite probably have occurred ; that the incidence 

 of the disease appears to be quite different from that of louse-borne 

 maladies ; and that the disease appears to be strictly confined to 

 certain localities year after year. If it were due to lice it could hardly 

 remain so localised among a chstinctly migratory population. More- 

 over, the freedom of Europeans from louse-borne fever indicates 

 that such infection is not readily communicated to them under the 

 hygienic conditions in which they live. Against the tick theory is 

 the fact that there is no direct evidence of tick bite. 



The author strongly suspects that the disease is one affecting animals 

 of the jungle and that it is conveyed to man by a tick, the disease 

 being either the same as Rocky Mountain fever or very closely related 

 to it. It is probably widely distributed in India and other parts of 

 the world, but is frequently mistaken for typhoid fever. Further 

 research in connection with the disease is urgently needed, and meantime 

 precautions against tick bite should be taken in the affected localities 

 on the lines that have proved successful in the Rocky Mountains. 



Megaw (J. W. D.). A Note on the Twelve-day Fever of Nigeria.— 



Ind. Med. Gaz., Calcutta, Ivi, no. 10, October 1921, pp. 371-373. 



The author comments on a recent record of a newly discovered fever 



of 12 days' duration in Nigeria [R.A.E., B, ix, 195]. He considers 



