In Australia it occurs in Queensland, New South Wales, Victoria and South Australia.
In Europe in Italy, Spain, Portugal, Greece, in the Mediterranean Islands.
In South America, Central America, Mexico, North America, and the West Indies it is very abundant, and it also is found in the Bahama Islands, Fiji, Sandwich Islands, Samoa, the Azores, Teneriffe and Santa Cruz, Pitcairn Islands and Bermuda.
For a full account of its distribution the reader is referred to the following: “The Distribution of the Yellow Fever Mosquito (Stegomyia fasciata, Fabricius) and General Notes on its Bionomics;” “Mém. 1er Congrès international d’Entomologie, 1911, ii, pp. 145–170, F. V. Theobald.” In addition to being the yellow fever carrier, it is supposed by Wenyon to be the intermediate host of the parasite of Bagdad sore.
Stegomyia scutellaris, Walker.
A vicious biter, found in India, China, Malay, East Indies, and Ceylon. The thorax has one median silvery stripe, and so can easily be told from S. fasciata.
A very similar species occurs in Fiji, but can be told by the pleuræ having white lines, not spots (S. pseudoscutellaris, Theobald). It is the intermediate host of filaria in Fiji (Bahr).
A number of nearly allied genera occur here (vide synoptic table).
Genus. Theobaldia, Neveu-Lemaire.
Theobaldinella, Blanchard.