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Stegomyiafasciata, F., Cidexfatigans,Wied., C. scapularis, Rdn., Taenio- 

 rhynchus juxta-mansoni, Chagas, T. titillans, Walk., T. fasciolatus, 

 Axrib., Sabethes albiprivatus, Lutz, S. longipes, Macq., Sabethoides 

 purpureus, Theo., S. confusus, Theo., Cycloleppteron medio punctatum, 

 Theo., Phoniomyia pallidiventer, Theo., P. longirostris, Theo., Dendro- 

 myia personata, Lutz, D. paraensis, Theo., D. oblita, Lutz, Tricho- 

 prosopon compressmn, Lutz. 



Reduviidae. Triatoma sordida, Stal, T. brasiliensis, Neiva, 

 T. maculata, Erichs., and T. megista, Burm. 



Culicoides guttaUis, Coq., and (J. paraensis, Goeldi, were also taken. 

 The former is very abundant in the morning and bites in full sunhght ; 

 it is less frequently met with in the evening. Observations made 

 confirm the breedmg of Chlorotabanus mexicanus, L., in marshes 

 or other muddy places. Lepidoselaga paradoxa bites in full sunlight, 

 disappearing at night-fall. In certain dry regions the travellers were 

 attacked by clouds of Chrysops parvifascia, Lutz. Tabanus mucro- 

 natus is very conmaon in some parts of Goyaz and attacks man. In 

 no case was Poecilosoma cinereum observed attacking man or animals. 



The dislike shown by Anophelines to light was confirmed. Anophe- 

 hne larvae were collected in abundance, and it would seem that aesti- 

 vation is very marked in these regions. Anopheles albimanus was 

 always met with in small numbers, though any collection of water — 

 even such as are formed by the imprint of a duck's fee" in muddy 

 groimd — serves as a breeding place. In semi-uninhabited regions 

 where water was abundant and vegetation dense, Anopheles {Stetho- 

 myia) nimbus, Theo., was found. This mosquito is not believed to 

 transmit malaria. It bites the hips and legs of domestic animals, 

 whereas A. {Matiguinhosia) liitzi, Cruz, which also occurs in these 

 districts, attacks the abdomen. The latter species becomes more 

 numerous at night-fall, a time at which A. nimbus disappears. 

 A. {Cellia) argyrotarsis and A. (C.) albim,anits are scarce in these regions, 

 a fact which agrees with the statement of North American writers^ 

 that these species are practically the sole transmitters of malaria in 

 the tropical parts of America, because they are only met with in 

 inhabited localities. Swarms of Anophelines that attacked in broad 

 daylight were at once recognised as A. {Cellia) brasiliensis, the only 

 Brazilian species attacking in sunlight. If this mosquito should be 

 proved to transmit malaria the habit of biting by day will be a serious 

 obstacle to the settlement of the regions where it occm's. That 

 A. {Myzomyia) lutzi was not found is explainable through the absence 

 of the Bromeliaceous plants holding water, in which it breeds. Another 

 missing species, Anop)heles mattogrossensis, has been found only in the 

 State of Matto Grosso. Except in the villages along the S. Francisco 

 and Preto Rivers neither Stegomyiafasciata nor Culex fatigans occur 

 in the interior of Brazil. 



As might be expected in view of the preference of Triatoma sordida 

 for the neighbourhood of streams, this species was not found in arid 

 districts. In some localities where Chagas' disease occurred, such as 

 Porto Nacional, it was the only species found and therefore must be 

 held to play an important role in the transmission of this disease. 

 Triatoma brasiliensis, T. maculata, T. sordida and T. megista were 

 found in houses at S. Raymundo Nonato, though no trypanosome 

 infection was observed. In the town of Parnagua, T. megista vvas 



(C464) a2 



