First State Records of Flower Flies (Diptera: Syrphidae): Copestylum vittatum Thompson in Connecticut and Mixogaster johnsoni Hull in Rhode Island

摘要

The two flower flies featured in this report differ in several ways. Larvae of Copestylum vittatum Thompson in the Eristalinae develop in rotting joints of one or more species of prickly pear cactus, Opuntia spp. (Smith 1891, Wallace and Lavallee 1973, Maier 1982, Rotheray et al. 2009). Larvae of many other species of Copestylum feed upon the rotting" parts of various species of Cactaceae, Agavaceae (Rotheray et al. 2009), or Bromeliaceae (Rotheray et al. 2007) or in decaying stumps or inflorescences of Musaceae (Sack 1921, Seifert and Seifert 1976). Copestylum vittatum, reported previously as distributed from Alberta to New York southward to Texas and Florida (Wirth et al. 1965), can be common where its hosts are abundant (C. Maier unpubl.).