Key to third-instar Chrysomyinae (Diptera : Calliphoridae) from carrion inthe continental United States

The introduction of 4 Chrysomya Robineau-Desvoidy spp to the Americas has m ade obsolete previously published keys to Nearctic calliphorid larvae, part icularly those covering the subfamily Chrysomyinae. To assist forensic ento mologists, ecologists, and public health workers, we provide a key to 3rd i nstars of 8 chrysomyine species reported from or likely to occur in carrion within the continental United States. The tare tin the United States) spec ies Cochliomyia aldrichi Del Ponte, C. minima Shannon. and Chloroprocta idi oidea (Robineau-Desvoidy) are not included because specimens and suitable d escriptions were unavailable.