IDENTIFICATION OF THE GEOGRAPHICAL SOURCE OF ADULTS OF THE OLD-WORLD SCREWWORM FLY, CHRYSOMYA-BEZZIANA VILLENEUVE (DIPTERA, CALLIPHORIDAE),BY MULTIVARIATE-ANALYSIS OF CUTICULAR HYDROCARBONS

The cuticular hydrocarbon compositions of male and female Chrysomya be zziana from different locations are qualitatively similar but show qua ntitative differences. The qualitative similarity and lack of marked q uantitative differences over its whole range is consistent with C. bez ziana being a single species. This accords with the results of studies on hybridization, morphology, allozymes, and chromosomes. Canonical v ariate analysis of quantitative differences has enabled grouping of lo cations by geographical regions. Components insensitive to age and sex have been identified that would permit the location by geographical r egion of a fly of unknown age and sex. However, greater precision is o btained if the sex of the fly be known. (C) 1998 Elsevier Science Inc.