146 



In a footnote Roubaud agrees with the author regarding the 

 numerous hosts of Leptomonas davidi among the Rhynchota occurring 

 on Euphorbia. The presence of Stenocephalus is not necessarily 

 associated with fiagellosis. In 1911 Bouet and Roubaud transmitted 

 flagellosis mechanically by means of Dieuches himiilis, a fact that 

 seems sufficient to explain the generalisation of the infection in 

 Euphorbia without assuming an intermediary development. 



Van den Branden ( — ) & Van Hoof ( — ). Recherches sur la Fievre 

 r6currente africaine. — Bull. Soc. Path. Exot., Paris, xv, no. 4, 

 12th April 1922, pp. 220-229. 



Experiments are described which prove that the flying-fox, Cyno- 

 nycteris straminea, is not susceptible to infection by the spirochaete 

 of African relapsing fever, Spirochaeta duttoni, transmitted by Orni- 

 thodorus moubata. In vitro, even after three hours, the blood of this 

 bat does not affect the vitality of the spirochaete, but the latter rapidly 

 disappears from the blood-stream. 



Specimens of Ornithodoriis moubata have been received from various 

 localities in the Lower and Middle Congo regions. If the tick occurs 

 throughout the bush areas there, it is certain that endemic centres 

 of the spirochaetal infection must already have been estabhshed. 

 One has been revealed in the course of clinical observations, and 

 several specimens of the tick were obtained from the same place. 

 Further research should disclose fairly numerous centres of infection 

 in all districts where the conditions enable the tick to survive. 



RoDHAiN (J.). Sur la Receptivite des Roussettes 6pauli^res, Eponio- 

 phorus le'ahlbergi haldemani (Hallowel) et Epomophorus pusillus 

 (Peters) aux Trypanosoma gambiense (Button) et congolense 

 (Broden). — Bull. Soc. Path. Exot., Paris, xv, no. 4, 12th April 

 1922, pp. 246-253. 



Following on experiments with Cynonycteris straminea [R.A.E., B, 

 iv, 101], it has been found that two other African bats, EpomorphoruS 

 .spp., are susceptible to trypanosome infection. They were infected 

 with Trypanosoma congolense and T. gambiense. The former produces 

 fatal infection of the acute type, while the latter gives rise to the 

 chronic type, of which the duration and severity remain to be investi- 

 gated. The work done hitherto demonstrates the more general 

 infective power of T. gambiense as compared with T. congolense and 

 T. cazalboui. 



MuRAz (G). Essai de Determination de la Liraite nord de la Maladie 

 du Sommeil en Afrique ^quatoriale franpaise. Travaux du Seeteur 

 de Prophylaxie du Tchad d'Avril 1920 a Avril 1^21.— Bull. Soc. 

 Path. Exot., Paris, xv, no. 4, 12th April 1922, pp. 253-280, 1 map. 



Sleeping sickness does not appear to be of recent introduction in 

 the region south of Lake Chad. In the last few years it has been 

 localised, especially on the banks of certain rivers, large zones 

 that are nearly free separating regions that are severely affected. 

 The northern limit-line of sleeping sickness in French Equatorial 

 Africa passes between the 9th and 10th degrees of north latitude. 

 The extension of the disease north of this line is not to be feared, 

 provided that the present prophylactic work is carried on and the posts 

 at which traffic is inspected and passed are maintained. 



