107 



surrounded by an adhesive cement and so arranged on the 

 abdomen of the mosquito that their anterior poles, on which the 

 micropyle is placed and from which the larva makes its escape, 

 point downwards. The cement softens in water and becomes 

 viscid. It seems probable that the eggs, not being very strongly 

 attached to the leaves adhere to the Janthinosoma walking over 

 the latter. The eggs that become attached to the thorax, wings 

 or legs of the mosquito drop off, while those sticking to its 

 abdomen remain there until the larva emerges and drops on to the 

 mammal whose blood the mosquito is sucking. The two illus- 

 trations show /. liitzi carrying the eggs of Dermatohia cyani- 

 ventr/s and the anatomv of a larva of the latter. 



MoREiLL (A. W.). Entomological Pioneering in Arizona. — .11. 

 Econ. Entom., vi, no. 2, April 1913, p. 185-195. 



In many parts of xlrizona the blood-sucking cone-nose {Conor- 

 rhinus sanguisugus) takes the place of the bed-bug as a household 

 pest. 



Prevention of Mosquito Bites. — Re vista del InstiUito Agricola 

 Catalan de San Isidro, 5th Feb. 1913, p. 45. 



A traveller in Louisiana, U.S.A., says that in those parts of 

 the country in which luosquitos are a serious pest, the follow- 

 ing method of driving them away is in use. A piece of camphor 

 about one-third the size of a hen's eg^ is placed in a tin which 

 is hung over the chamber-lamp, care being taken that it does 

 not take fire. The camphor vapour is said to have effectively 

 prevented the mosquitos from entering the house even when the 

 windows were open. During- several years' residence at a place 

 in which at one time life was almost intolerable, the mosquitos 

 seemed to disappear from the house, and his servant explained 

 that he had got rid of them by burning pieces of camphor once 

 or twice a week. 



Means of preventing the attack of Mosquitos. — Revista del Instituto 

 Agricola Catalan de San Isidro, no. T, 5th April 1913, 

 p. 108. 



Various methods have been suggested for preventing the attacks 

 of mosquitos, such as rubbing the exposed parts of the body with 

 camphorated alcohol, oil of peppermint, lemon juice or vinegar. 

 It is however stated that the following formulae are much more 

 useful and that they can be employed by sprinkling a few drops 

 of each on a napkin tied to the head of the bed or set close to it 

 in a small open vessel. 



(a) Essential oil of oranges 30 grms., camphorated alcohol 

 30 grms., oil of cedar 15 grms. 



(h) Castor oil, alcohol and oil of lavender in equal parts. 



