146 



flagellate. In the case of geckos inoculated with cultures of Leish- 

 mania tropica, the flagellates pass into the blood and can be recovered 

 at least 13 days after inoculation. Neither Leislimania nor Lepto- 

 monas manifest their presence by any lesion of the blood or organs, 

 nor can they be discovered by direct examination, but only in a 

 culture medium. Oriental sore has never yet been produced either 

 in men or monkeys by means of Leislimania passed through geckos, 

 though whether the virulence is actually lost by this passage is not 

 known. 



Petit (G.) & Tournaire (P.). Sur la Repartition des Gites d' Ano- 

 pheles dans I'Arrondissement de Bergerac (Dordogne). — Bull. Soc. 

 Path. Exot., Paris, xii, no. 6, 11th June 1919, pp. 332-339. 



The observations recorded in this paper on the occurrence of 

 Anophelines in the environs of Bergerac were made in the course 

 of compiling the Anopheline chart of France for the Malaria Com- 

 mission. The districts examined are described in detail and their 

 suitability as breeding places of mosquitos discussed. Bergerac, on 

 the right bank of the Dordogne, is intersected with a network of 

 canals, streams and ponds, providing both running and stagnant 

 water which is nearly always polluted and forms excellent breeding- 

 grounds for the development of mosquitos. The banks of the river 

 are in many places overgrown with aquatic plants and these harbour 

 an abundant fauna of Anopheles, Culex and other Diptera. In all 

 the breeding-places in Bergerac only Anopheles maculipennis was 

 found, but in one spot, in the shady park of a private residence, some 

 larvae of A. bifurcatus were taken from the fresh water of a fountain. 

 South of the Dordogne the outskirts of Bergerac extend into a plain, 

 where a system of small streams, more or less permanent, and many 

 small stretches of boggy ground harbour many larvae of A. maculi- 

 pennis and A. bifurcatus, sometimes occurring together, but the 

 former more abundantly than the latter. This plain and the 

 valleys around generally show a greater abundance of Anophelines 

 than the higher ground. Although A. maculipennis, the predominant 

 species, prefers pure water, it is frequently found in soiled and polluted 

 water in company with Culex spp. A. bifurcatus has only been 

 found in clear, shaded, cold water, sometimes with A. maculipennis. 

 In the region dealt with, malaria has been endemic for many years, 

 and where mosquitos are abundant, it is considered only prudent to 

 practice assiduously the various anti-mosquito measures. 



Arkwriciht (J. A.), Bacot (A.) & Duncan (F. M.). The minute Bodies 

 (Rickettsia) found in Association with Trench Fever, Typhus Fever 

 and Rocky Mountain Spotted Fever. — Trans. Soc. Trop. Med. 

 Hyg., London, xii, no. 4, 21st February 1919, pp. 61-73, 1 plate. 

 [Received 8th July 1919.] 



It has not yet been decided whether Rickettsia are micro-organisms 

 or not, the theory being either upheld or discounted according to 

 the personal opinion of the observer. Experiments made, and here 

 described, of the inoculation of healthy men and animals such as 

 monkeys and guineapigs with trench fever and typhus fever and the 

 subsequent feeding of lice on these patients, have led to the conclusions 



