ii) the same place, metamorphosis was liardly complete in fifteen 

 <lays; the number of mosquitos was also less and the filaria 

 remained for the most part at the second or third day stage. 

 Between 29° C. and 30° C. the Stegoinyla die in twenty-four 

 hours. 



Examination of the mosquitos collected showed that if Ci/Ic.r 

 and Anopheles took up the blood of the dog under observation 

 the development of the Filaria took place in Sterjomyia only. 

 This particular mosquito presented all the characters of 

 Stegomijia fasciata, F., and was identified as such by A. Krempf 

 of the Pasteur Institute at Nhatrang, and the authors think that 

 whatever part other mosquitos may play in the spreading- of the 

 disease, tliis Stegomyia is the most important agent in its distri- 

 bution. 



It appears to the authors probable that infection by Stegpinyia 

 takes place especially during the warmer and moist season when 

 the rains are not very serious, that is to say, between April and 

 August; the conditions from September to March with great 

 variations of temperature, violent gales, and torrential rains 

 being prejudicial to the mosquitos. 



Having thus established to their own satisfacti(m the fact that 

 Stegomyia fQsciata can take up Filaria from the blood of an 

 infected dog, and that the organism is capable of completing all 

 the stages of its development within the body of the Hy, the 

 authors reversed the order of experiment and caused a number of 

 the mosquitos which had been allowed to infect themselves ten or 

 fifteen days previously to bite six puppies of ten days old, whose 

 blood showed no traces of the disease, the mother being also free 

 from it. Every morning for fifteen days the dogs were bitten 

 by four or five mosquitos, which gorged themselves with blood, 

 generally remaining attached for five minutes. The puppies 

 were then enclosed with their mother in a large cage in which 

 six other control dogs of the same age were also living. All the 

 dogs which had been bitten succumbed within thirty days after 

 probable infection. The controls survived. 



The authors make some further observations as to the age at 

 which dogs in the town appear to be chiefly infected. Out of 

 three hundred examined, the youngest were a year old, and those 

 most seriously attacked more than three years, and it seems 

 probable that young dogs living in the native houses cannot 

 defend themselves against biting insects so easily as the older 

 ones. In those quarters of the town where 30 per cent, of the 

 dogs of all ages were affected, 50 per cent, or 60 per cent, were 

 less than a vear old. 



East Coast Fever in Nyasaland. — Ann. Bept. Dcpt. Agric, Xyasa- 

 land, 1912, pp. 31-36. 



Mr. Garden, the Veterinary Officer, reports that the disease of 

 cattle which appears to have been prevalent for a number of years 

 in Momberas country is identical with East Coast Fever and 

 Piroplasma parvum was found in every case in which Koch's 

 granules were discovered. The disease is known to the natives bv 



