Life cycle of "Xanthogaleruca luteola" (Coleoptera: Chrysomelidae) in Santiago, Chile, and sex fenotypo differentiation of adults

Periodical samples of eggs. larvae, pupae and adults of Xanthogaleruca lo! cola Muller (Coleoptera: Chrysomelidae) were obtained to determine its life cycle on urban trees affected in municipalities of Santiago. Metropolitan Region, Chile. The duration of the pupae und adult stages were determined also in the laboratory. Adults were collected to determine the sex ratio and to study sex phonological differences, which were corroborated trough analysis of genitalia. Four generations of X. luteola a year were determined for Santiago, Chile, from October through April with duration of one to two months each, and also a hibernation penad for adults lasting four months. The X. luteola individuals were reared successfully in the laboratory, and the duration of the pupa and adult stages were similar to those in the literature. Phenotypical sex differences were established between adult X. luteola individuals, which were verified by analysis of genitalia, and a 1:1 sex ratio was determined.