The Taxonomy and Biology of Psorophora (Janthinosoma) Johnstonii (Grabham, 1905)1 (Diptera: Culicidae)

The problem of mosquito control in the Florida Keys is complicated by the presence of appreciable populations of such species as Anopheles albimanus Wiedemann, Aedes tortilis(Theobald), Culex atratus Theobald, Culex bahamensis Dyar & Knab, and Psorophora johnstonii (Grabham) which are unknown as prolific breeders elsewhere in the United States. In connection with intensive mosquito survey work in the Florida Keys during 1947 and 1948, information has been accumulated concerning the taxonomy, biology, and pest importance of Psorophora johnstonii (Grabham). As the literature is somewhat confused and incomplete, a discussion of the taxonomic position of this mosquito is presented first, in order that the reader may be properly oriented before continuing with the notes on the biology of the species.