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SCIENCE PROGRESS 



fasciata, Fabricius), the Household Brown Mosquito {Culex 

 fatigans, Wiedemann), and the Brown Spotted-Mosquito {Theo- 

 baldinella spathipalpis, Rondani). 



The Yellow Fever Carrier {Stegomyia fasciata) is commonly 

 called the " Banded " or Tiger Mosquito. It occurs in the fol- 

 lowing countries : Europe — in Spain, Portugal (south). Southern 

 Italy, Greece, the Mediterranean Islands; Asia — in India, the 

 Malay ports, China and Japan; Africa — in Natal, Transvaal 

 and Orange River Colonies, in Rhodesia, Uganda, on both east 

 and west coasts, in Egypt and up the Nile past Khartoum, 

 in Algeria and Tunis ; North America, in the central and 

 southern States, and, as we proceed south, still more abundantly 



Fig. 3.— The Distribution of the Yellow Fever Mosquito (Stegomyia fasciata Fab.). 



in Central and South America and the West Indies, which 

 regions seem to be its original home. It is abundant in Australia, 

 and passes up the East Indies to join the others at Malaya. 

 Most oceanic islands also have this insect in their fauna. There 

 is little doubt that the Central American States and West Indies 

 are the home of Stegomyia fasciata, and that it has spread out 

 from this area by artificial means. This is easily explained by 

 the fact that we frequently find the Tiger Mosquito on board 

 ship, and often in considerable numbers. In the old days they 

 probably bred in the ship's tanks, just as we find them doing 

 now on the Nile steamers. Coming to port, a certain number 

 may fly to land, and so set up a new colony. In this respect 



