106 



Admitting that locally acquired cases due to P. fraecox (falciparum) 

 have undoubtedly occurred in France, the fear of this parasite becom- 

 ing established in the coimtry is merely a hypothesis which the future 

 may prove to be correct, but which can equally well be opposed by 

 other hypotheses that may or may not be correct. The geographical 

 distribution of the three forms of Laveran's parasite obeys certain 

 laws ; as malaria due to P. praecox has not yet become established in 

 the south of France, it is obvious that there are certain serious obstacles 

 opposed to it, for it has certainly been introduced there long ago. 



M. Roubaud stated his opinion that the findings of the authors, 

 while interesting and a priori logical, do not appear to be quite in 

 accordance with experimental facts. He does not consider it estab- 

 lished that P. praecox requires a higher average temperature for its 

 development than P. vivax. He quotes the opinion of various authors 

 on this point, remarking that in his own observations no appreciable 

 difference has been observed regarding the sensibility to heat of 

 P. vivax and P. praecox in Anopheles maculipennis. The only fact 

 that can, in his opinion, explain the earlier appearance of P. vivax in 

 the seasonal periodicity of the two tertian forms, is the more rapid 

 development of this parasite in the mosquito than of P. praecox 

 under the same conditions of temperature. He considers it probable 

 that it is this early invasion of P. vivax that limits to too short a period 

 of time in the French climate the appearance in the blood of gametes 

 of the tropical parasite. 



Langeron (M.). Morphologie et Biologie de la Larve de Theobaldia 

 spathipalpis, Rondani, 1872. [Morphology and Biology of the 

 Larva of Theobaldia spathipalpis, Rondani, 1812.]— Bull. .Soc. 

 Path. Exot., Paris, xi, no. 2, 13th February 1918, pp. 98-104, 8 figs. 



Theobaldia longiareolata [spathipalpis) is a Avidely distributed 

 mosquito in southern Europe and Africa, and is also found in the 

 islands of the Atlantic Ocean and of the Mediterranean, and even 

 in India. In 1911, larvae of this species were observed in Tunis 

 associated with those of Stegomyia fasciata (calopus), and w^ere reared 

 in the Pasteur Institute at Tunis. The larvae of the two species 

 are remarkably similar and during the period of development are 

 almost impossible to distinguish with the naked eye, though 

 T. longiareolata eventually grows to a larger size. As the larvae of 

 T. longiareolata do not appear to have been previously described, 

 they are fully dealt with in this paper and are differentiated from 

 those of S. fasciata. 



Leger (M.) & MouzELs (P.). Dermatose prurigineuse determlnee par 

 des Papillons saturnides du genre Hylesia. [Pruriginous Derma- 

 tosis due to Saturniid Moths of the Genus Hylesia.] — Btdl. Soc. 

 Path. Exot., Paris, xi, no. 2, 13th February 1918, pp. 104-107, 1 fig. 



Instances are recorded of a vesiculo- erythematous eruption which 

 is frequently observed, especially among children, at the end of the 

 rainy season in Cayenne. These eruptions almost always occur on 

 the exposed parts of the body, and are caused by a Saturniid moth 

 of the genus Hylesia, or some closely allied genus. The wings and 



