o 



7 



Rio de Janeiro, chiefly because the species which breed exclusively 

 in Bromeliaceae and bamboos were not present. The absence of many 

 other species may be accounted for by the limitations due to the 

 character of the journey, the comparatively small number of per- 

 manent lakes, the high temperature of the water due to continued 

 sunshine and the prolonged dry weather. The larvae met with 

 were identified as belonging to the genera Cellia, Mansonia, Culex, 

 Melanoc&nion, Uranotaenia and Aedes. The larvae of Aedomyia 

 squamipennis, Arrib., were easily distinguishable by having a large 

 air-bag on either side at the base of the antenna; Anopheles (Cellia) 

 argyrotarsis, R.D., occurred throughout the journey, sometimes 

 invading the steamboat when in harbour. A. albinianus, Wied., is 

 comparatively rare. Taeniorhynchus {Mayisonia) titillans, Walk., 

 occurred in some lakes, but this species is not common. Uranotaenia 

 pulcherrinfha, Arrib.. was abundant, but U. geotnetrica, Theo., was rare. 

 The last two species seldom attack man, but do not lack mandibles, 

 as is the case with CuJex cingulatus, Theo. (nee F.), and A. squamipennis. 

 Culex fatigans, Wied., and Stegmnyia fasciata, F., were abundant on 

 board, where they bred in water in the ship's hold. Blood-sucking 

 Hemiptera included Cimex lectuhrius, Triatoma megisia, Burm., 

 T. maculata, Erichs., and T. infestans, Klug, while an example of 

 T. rubrofasciata was taken in the city of Bahia. 



LuTZ (A.). Tabanidas do Brazil e de alguns Estados visinhos: Segunda 

 Memoria. [Tabanids of Brazil and of some neighbouring States : 

 Second Memoir.] — Mem. Inst. Oswaldo Cruz, Rio de Janeiro, vii, 

 no. 1, 1915, pp. 51-119, 3 plates. 



This paper is a continuation of former ones on the systematics of 

 the Tabanidae of Brazil [see this Review, Ser. B, iii, p. 194]. The 

 genera, AcantJiocera, Dichelacera and Slibasoma are here dealt with 

 in detail. Keys to the species are given, many being described as new. 



Torres (M.). Alguns fatos que interessam a epidemiolojia da 

 molestia de Chagas. [Some facts relating to the epidemiology of 

 Chagas' disease.] — Metn. Inst. Oswaldo Cruz, Rio de Janeiro, vii, 

 no. 1, 1915, pp. 120-138. 



These observations were made in Brazil in that part of the State of 

 Minas Geraes which lies on both sides of the Rio das Velhas, a tributary 

 of the S. Francisco River. In this large area the clay-walled, 

 palm-thatched cottages of the inhabitants are found everywhere. 

 Triatoma tnegista and T. sordida abound in them, especially the first 

 named, of which few individuals were free from flagellates, while 

 T. sordida, on the contrary, rarely carried them. As regards these 

 two species in this region, the absence of natural infection was very 

 evident, all the flagellates observed in their alimentary canals being 

 stages of Trypanosoma cruzi, morphologically identical with the 

 parasites obtained in infections in the laboratory. Triatoma sordida 

 was never found parasitised under natural conditions in the open. 

 The age of the insect was found to have a bearing on infection. In 

 cottages where all the adult bugs were infected, some of the nymphs 



