189 



Francis (E.) cl- Lake (G. (.) Tularaemia Francis 1921. III. 

 Experimental Transmission of Tularaemia in Rabbits by the Rabbit 

 Louse, HacmodipsHS vcntricosus [Benny).— Public Health Rcpts., 

 Wns/iington, xxxvi, no. 30, 29th July 1921, pp. 1747-1753. 



The successful transmission of tularaemia from diseased rabbits to 

 healthy ones and to guinea-pigs by means of the rabbit louse, Haemo- 

 dipsns ventricosiis, Denny, offers an explanation of the means by which 

 the infection is maintained throughout the \-ear in jack rabbits in 

 Utah. 



DupoNT (P. R.). Entomological and Mycological '^oies.— Seychelles : 

 Ann. Rept. Agnc. & Croicii Lands, 1V20, Mctoria, 1921, p. 7. 

 [Received 7th September 1921.] 



The tick, Boophiliis annulatiis anstralis, Fuller, is reported as causing 

 severe injury to milch cows in Seychelles. Steps are being taken to 

 use a spray against it, pending the time that compulsory dipping is 

 adopted by the government. 



Nagler (A.). Bekampfung der Scliairaude durch Begasung. [The 

 Treatment of Sheep Mange by Fumigation.]— L'rr/nztT Tierdrzil. 

 Wochenschr., 1920, p. 553. ' (Abstract in Deutsche Tierdrztl. 

 Wochenschr., Hanover, xxix, no. 36, 3rd September 1921, p. 458.) 



Mange in sheep has been successfully treated by fumigation with 

 SOo (sulphurous anhydride) in a wooden disinfection chamber accom- 

 modating four animals, and allowing their heads to project through 

 special gas-tight collars. Unshorn animals required 40 minutes at 

 a strength of 6 per cent., increased to 7-8 per cent, if the infestation 

 was severe. Two such applications made within five days kill all 

 mites and eggs. The treatment may be carried out in winter, in any 

 locality, entails no shearing, permits 48 animals to be dealt with in 

 ten hours, and is much cheaper than any other method. After fumiga- 

 tion the animals must be allowed to remain in the open air for a few 

 hours. 



Carpenter (G. H.). Insect Transformation. — London, Methuen & Co., 

 Ltd., 1921, X + 282 pp., 4 plates, 124 hgs. Price 12.s. Qd. net. 



In this book the subject of metamorphosis among insects is 

 expounded in a manner that may prove of service to the student and 

 to the general reader. The descriptions of outward and inward growth 

 and change are fully illustrated by selected drawings. 



The chapter of the greatest interest from the economic standpoint 

 is that headed " Growing Insects and their Surroundings." This is 

 a study of the relation of environment to insect transformation, and 

 the numerous insects that are selected as illustrations are almost all 

 of economic interest. The artificial control of such insects as mosquitos, 

 house-flies, sheep-maggot flies, ox warble-flies, and in fact, to a greater 

 or less degree, all insects of medical or veterinary importance, largely' 

 consists in altering the environment so as to render it unsuitable for 

 them ; and the general survey here provided is likely to pro^^e very 

 helpful in this connection. 



