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Morphology, Biology and Distribution of Corn-infesting Ulidiidae

Gaurav Goyal

出版	University of Florida, 2010
URL	http://books.google.com.hk/books?id=KNFeAQAACAAJ&hl=&source=gbs_api

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Morphology of the immature stages was examined for three species of Ulidiidae using light and scanning electron microscopy. Many egg, larval, and pupal characters were measured and described, but only a few traits in each stage could be used to separate the species due to considerable range overlap. Pores were restricted to the posterior end of C. massyla eggs, but distributed over the entire surface of E. eluta and E. stigmatias eggs. A distinct tooth on the ventral surface of the mouth hooks separates C. massyla larvae from the other species. Euxesta eluta and E. stigmatias had more oral ridges than C. massyla. The two Euxesta species could be separated based on the length of the 2nd and 6th creeping welts. The first row of spinules was discontinuous on the 4th - 8th creeping welts in larval C. massyla while it was continuous in Euxesta species. The larval posterior spiracles were black on E. eluta, dark brown to black on E. stigmatias and brown on C. massyla. Chaetopsis massyla pupae were reddish brown while E. eluta and E. stigmatias pupae were light brown to black. The posterior spiracular plates in C. massyla pupae were trapezoidal in shape while those in E. eluta and E. stigmatias were ovoid.