112 



/. canisuga is also a, three-host tick, occurring in the nests of 

 sandmartins. Attempts to raise this species under laboratory 

 conditions failed, but it was ascertained that it laid a small 

 number of eggs, according with the expectation that Ixodes 

 parasitic upon hosts with fixed habitats lay fewer eggs, sin6e they 

 are less exposed to loss of life than species occurring upon wander- 

 ing hosts. 



/. hexagonus lives on three hosts and is also difl&cult to rear 

 in captivity. There is no evidence that the male ever sucks 

 blood. 



I. ricinus larvae were found to carry Piroplasvia diver gens to a 

 calf. The time required for metamorphosis from egg to nymph 

 is approximately 175 to 185 days. The females laid 2,400-0,200 

 eggs and survived up to 10 days after oviposition. Unfed larvae 

 were lively after 1T6 days at 10° C. in a corked bottle. 



Haeynajjhysalis leachi is easily reared on different hosts and 

 may run twice through its life-cycle in a year, C. P. Lounsbury 

 even raising three generations in a year. It abandons its host on 

 the approach of death, in which it differs from other ticks. 



H. punctata is common on sheep, and, according to McFadyean 

 and Stockman, may transmit Firoplasma divergens, causing 

 British redwater in cattle. This tick also seeks a different host 

 in the larval, nymphal and adult stages and completes its life- 

 cycle in one to two years. 



Hyalonima aegyptium requires three hosts, but on hedgehogs 

 behaves like two-host ticks. 



Rliipicepliahis appendiculatus from S. Africa has been reared 

 under experimental conditions by the author. 



TouxG (T. C. M.). Mosquitos in Assam. — Brit. Med. JL, 24th 

 May 1913, pp. 1136-1137. 



The Ramna at Dacca is a recently cleared area on which the 

 new Government offices and the residences of civil ofl&cials are 

 built and covers about 2 square miles. Under the author's super- 

 vision the whole of this area was thoroughly cleansed and every 

 possible breeding ground for mosquitos destroyed. Despite 

 these measures the position was not materially improved, for 

 even a gentle breeze from the south brought abundance of 

 miosquitos from ihe breeding grounds in Dacca city, 1^ miles 

 away, and the author came to the conclusion that in order to 

 protect the cantonment properly it would be necessary to carry 

 out similar anti-mosquito measures in Dacca city as well, involv- 

 ing an efficient surface drainage system which was estimated to 

 cost 50 lakhs of rupees. 



Macdoxald (A.). Is Yellow Fever Endemic in Jamaica. — Brit. 

 Med. JL, 17th May 1913, pp. 1083-1084. 

 In a paper read before the Jamaica branch of the British 

 Medical Association the author comes to the conclusion that 

 yellow fever is not endemic in Jamaica. The stringent quaran- 

 tine regulations render the importation of yellow fever difficult, 



