78 



material in the water, and in the presence of oil or grease already on 

 the water. These are the three chief causes that prevent films of oil 

 from spreading, and they should always be considered when estimating 

 the required addition of castor-oil if oiling is to be done economically 

 and effectively. 



Parrot (A.). A propos de I'identification des Phl6botomes de France. 



— Bull. Soc. Path. Exot., Paris, xiv, no. 1, 12th January 1921, 

 pp. 21-22. 



The female Phlehotomus taken by Mansion at Bron- Village (Rhone) 

 [R.A.E., B, ix, 37] is considered to be PhJebotomns perniciosus, 

 Newst. The scanty information regarding the specific characters of 

 the females of this genus is chiefly due to the lack of precision hitherto 

 prevailing in the matter of specific descriptions. The difficulties 

 attending determination compel the use of methods not quite usual 

 in systematic work. Franca and the author have endeavoured to 

 lay down the general rules to be followed [R. A.E.,1B>, ix, 21], and 

 the almost certain determination of the above-mentioned specimen 

 proves that existing lacunae are being filled. 



pRANgA (C). Sur la Determination specifique d'une Femelle de 

 Phlebotome. — Bull. Soc. Path. Exot.. Paris, xiv, no. 1, 12th 

 January 1921, pp. 23-24. 



The characters found in Phlehotomus perniciosus, Newst., and those 

 of the female specimen recorded in the preceding paper are given in 

 order to show their agreement. 



The females of European species may be divided according to wing 

 and colour characters, and a key to them based on these is given. 



Martial (R.) & Senevet (G.). Presence' a Fez d''Ornithodorus 

 talaje (Guerin-Meneville, 1849). — Action pathogene sur P Homme. 



— -Bull. Soc. Path. Exot., Paris, xiv, no. 1, 12th January 1921, 

 pp. 24-26. 



Some ticks found at Fez are believed to be Ornithodorus talaje ; 

 they are distinct from 0. maroccanus, already recorded from Morocco 

 [R.A.E., B, vii, 86]. The discovery was made as a result of bites 

 suffered in a native dwelling. 



DEL PoNTE (E.). Contribucion al Estudio del Gen. Triatoma, Lap. 

 Primera Parte. Anatomia externa. [A Contribution to the 

 Study of the Genus Triatoma. First Part. The External 

 Anatomy.] — Rev. Inst. Bad., Buenos Aires, ii, no. 5, May 1920, 

 pp. 729-744, 23 plates. [Received 22nd February 1921.] 



The subject-matter of this paper is indicated by its title. 



ZiE]\L\NN (H). Einfluss der Tropenmedizin auf die medizinische 

 Wissenschaft. [The Influence of Tropical Medicine on Medical 

 Science.] — Arch. Schiffs- u. Trop.- Hyg., Lcipsic, xxv, no. 1, 

 February 1921, pp. 14-31. 



This paper is divided into a number of sections, one of which deals 

 with the increasing importance of Arthropods in the transmission of 

 disease and the part played by Tropical Medicine in this connection. 



