201 



in winter without a long hibernation of the sporozoites in the salivary 

 glands. Further, the maturation of eggs ceases during the autumn 

 and winter. This suspension of egg production probably removes the 

 necessity for the adults to take wing in the open, with the result that 

 the number of infected mosquitos closely associated with man is 

 increased. The interruption of breeding also has the practical result 

 that the mosquito population indoors (which includes infected indi- 

 viduals) is not diluted by new arrivals. 



The correlations between the outdoor temperature and the per- 

 centage of gorged females, between the outdoor temperature and the 

 percentage of females with mature eggs, and between the percentage of 

 gorged females and that of females with mature eggs were also studied. 



It is not possible to indicate a minimum outdoor temperature at 

 which feeding ceases indoors. In 1920-21 the minimum of engorged 

 females occurred between 11th January and 14th February, while in 

 1921-22 this period extended from 27th December to 27th February. 

 In general it may be said that with an outdoor temperature under 

 6° C. [42-8° F.] mosquitos in houses cease to mature eggs, though 

 mosquitos in stables do so, probably because stables are warmer than 

 the bedrooms in which most of the house mosquitos are caught. When 

 the percentage of gorged females falls below 9, maturation of eggs ceases. 



That outdoor temperature in itself influences egg production only 

 slightly is proved by the fact that eggs mature in spring with an 

 outdoor temperature of 6°-7° C. [42-8°-44-6° F.], while they do not 

 do so in autumn at 13°-16° C. [55-4°-60-8° F.]. The autumnal 

 development of the fat-body may, perhaps, be the cause of this. 



These observations show that at Amsterdam there is no true hiber- 

 nation (complete inactivity) of A . maculipennis, contrary to the habits 

 of the same species in Denmark as described b}^ Wesenberg-Lund. 



VAN Thiel (P. H.). Aanteekeningen over Agamodistonmm anophelis. 

 [Notes on A. anophelis.] — Tijdschr. Vergelijk. Geneesk., Leyden, 

 vii, no. 4, 5th August 1922, pp. 305-321, 1 plate. 



Of examples of Anopheles maculipennis, Meig., taken at or around 

 Leyden, 5 per cent, were infected with the Trematode, Agamodistomum 

 anophelis, encysted in the body-cavity. This differs from the parasite 

 found by Sinton and Soparkar [R.A.E., B, vi, 2, 130] in other 

 Anophelines, for which the name A . sintoni is suggested. 



Roger (J.). La Dyspepsie parasitaire et le Complexus symptomatique 

 li^ au Parasitisme gastro-intestinal. Diagnostic et Traitement. — 



Rev. Vet., Toulouse, Ixxiv, nos. 2-3, February-March 1922, 

 pp. 73-85, 153-165. 



Causes of intestinal disorders in equines due to the larvae of Gastro- 

 philus intestinalis {equi), G. haemorrhoidalis and G. veterinus are 

 discussed ; no specimens of G. pecorurn were observed. Carbon 

 bisulphide and essence of turpentine were the remedies employed 

 against these parasites. 



Bardelli ( — ). Gale dermatoryctique sur des Lapins et un Cobaye. — 



La' Clinica Veterinaria, January 1921. (Abstract in Rev. Vet., 

 Toulouse, Ixxiv. no. 3, March 1922, pp. 184-185. 



Mange due to Cnemidocoptes mutans was considered to be peculiar to 

 birds, but a case of natural transmission to rabbits and to a guinea-pig 



