56 



Itself, though it occurs in many parts of Java, has not been found in 

 Sumatra. A. {M.) flavus, Swell. [R.A.E., B, vi, p. 214] is dis- 

 tinguished from Anophelines of the Stethomyia group by the presence 

 of normal broad fork-scales and by its attitude when at rest, which 

 resembles that of Anopheles. A. {Nyssorhynchus) jawesi, Theo., 

 or a very closely-allied species, has been found by Darling at 

 Weltevreden (Batavia). The larva of A. [StetJiomyia) aitheni, James, 

 is found rather commonly in Java and Sumatra, though the adult is 

 very seldom met with. Further characters of the following species 

 are described : A. (Myzomyia) minimus, Theo., A. {Nyssorhynchus) 

 fuliginosus var. nivipes, Theo., and A. (Mysorhynchus) harhirostris 

 var. pallidus, n. 



Senevet (G.). Longueur du Vol, sans Arret, d'un Moustique sur una 

 Distance sup6rieure a mille Metres. — Bull. Soc. Hist. Nat. de 

 VAfrique du Nord, Algiers, x, no. 8, 15th November 1919, 

 pp. 185-186. [Received 20th January 1920.] 



It is reported that larvae of Culex (Acartomyia) mariae, Ed. & Et. 

 Sergent, were found in rock crevices containing brackish water about 

 13 feet above sea-level on an island off the Algerian coast. As the 

 larvae w^re about a fortnight old and there is apparently no possible 

 means of artificial transportation, it is thought that the adults must 

 have travelled a distance of over a kilometre across the open sea from 

 their nearest known habitat. 



CtObert (A.). Notes V6t6rinaires. — La Vie Agric. et Bur., Paris, xvi, 

 no. 2, 10th January 1920, p. 36. 



The usual formulae for cattle dips in the treatment of mange and 

 insecticidal powders for use against lice and fleas on domestic animals 

 and poultry are given. 



Stockman (Sir S.). Louping-ill. Duration of the Infectivity of the 

 Ticks. — Jl. Comp. Path. Therapeut., London, xxxii, no. 4, 31st 

 December 1919, pp. 283-285. 



The question of duration of infectivity of the tick [Ixodes ricinus] 

 with louping-ill has been discussed in previous papers [R.A.E., B, 

 vii, 17, 147]. It was demonstrated, before the tick was proved to be 

 the carrier of infection, that if infected pastures were kept free from 

 sheep for a year the disease reappeared upon re-stocking. It was 

 therefore presumed that the duration of infectivity is probably as 

 long as the hfe of the tick in the stage of its life-cycle in which it is 

 infective. 



Experiments that have recently been carried out and are here 

 described confirm the hypothesis that ticks engorging as nymphs on 

 acutely infected sheep become carriers of infection after moulting 

 to the adult stage. The investigations also indicate that the infecting 

 agent is not fully developed within the tick until a certain time after 

 the moult is completed. It is evident therefore that measures of 

 eradication based upon the method of starving the ticks are imprac- 

 ticable on account of the long period during which pastures would have 

 to be left idle. 



