131 



Filaria lachrymalis was found in about 30 per cent, of aged Egyptian 

 cattle. The filarial parasite infesting the conjunctival sac of camels 

 was identified as Thelcma leesei. During 1917 experiments were 

 made with a view to finding an inexpensive material for the prevention 

 of parasitic mange in camels, arsenical dips having proved ineffective. 



OooPER (H.). Note on the Treatment of Camels for Mange in the 



Districts.— .4 HH. Be pi. Vet. Service, 1916, Minist. Agric. Egypt, 

 Cairo, 1920, pp. 38-10. [Received 27th May 1920.] 



In these experiments the dressing as supplied by the Ministry and 

 consisting of 1 gal. of whale-oil, 2 lb. of sulphur and I lb. of sodium 

 carbonate was used, about 2 pints being the maximum amount used 

 for one animal at a time. Of 53 camels thus treated only four were 

 apparent]}^ not cured. 



Cooper (H.). Note on the Spraying of Animals for the Killing of 

 Ticks.— --1h«. Rept. Vet. Service, Iff 16, Mivist. Agric. Egypt, 

 Cairo, 1920, pp. 44-47. [Received 27th May 1920.] 



The number of apphcations from owners to have their cattle sprayed 

 increased considerably during 1916. Arsenical dips were used and 

 3,911 animals were treated. The necessity of supplementmg this 

 treatment by thorough disinfection of stables is emphasised. It is 

 hoped to continue the work on a larger scale in future and it is suggested 

 that the practicability of laying down permanent dipping tanks 

 should be considered. 



FiSKE (W. F.). Investigations into the Bionomics of Glossina pialpalis. 

 —Bull. Entom. Research, London, x, no 4, May 1920, pp. 347-463. 



A two-years' study has been made in Uganda of tsetse-fly conditions 

 and a mass of information has been collected which for the present 

 remains largely inapphcable, as the data obtained have to a great 

 extent reversed the original plans for the suppression of sleeping 

 sickness in Uganda, while no new working basis has as yet been laid 

 down. The accepted theory upon which suppressive and preventive 

 measures have been based in the past was that complete severance of 

 contact between fly and population was necessary in order to control 

 the disease ; in practice, however, it has been proved sufficient to 

 reduce the density of Glossina pal2)alis to within moderate hmits in 

 populated districts or to reduce density of population to within 

 moderate limits in fly-infested territory. This being so, knowledge 

 regarding the influences that control the range of the fly is more or 

 less superfluous, while knowledge of the factors that operate to control 

 breadth of contact between fly and population (equivalent to frequency 

 of contact between hungry flies and men) is specifically required. 



Investigations with a view to determining the reason for the low 

 female percentage in catches indicate that this is rather due to the 

 relative inactivity of the females than to the absence of the 

 sex. Females are probably only to be caught when hungry and 

 seeking food. The real sex-ratio is probably determined by respective 

 longevity of the sexes, which is perhaps a variable quantity. The 

 density oi infestation being equal the fly is far more likely to feed 



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