Fourth taxonomic study of California mealybugs, with additional species from North America, South America, and Japan (Homoptera: Coccoidea: Pseudococcidae)

Abstract

does not appear. First page follows. Introduction As more and more new species of pseudococcids (mealybugs) are discovered, not only in California but also in other areas of North and South America, it seems advisable to publish descriptions as promptly as possible. The material made available in this and the three earlier studies (McKenzie, 1960), (1961), (1962) will be used in organizing a definitive study on the systematics of California mealybugs. A number of species collected outside the state are considered, because they broaden our concepts of this important family of Coccoidea. Moreover, three species originally described from other states are here reported as occurring in California also. They are Phenacoccus infernalis McKenzie from Arizona, Spilococcus parkeri McKenzie from Nevada, and Trionymus caricis McConnell from Maryland. This paper describes two new genera of pseudococcids found in California and 22 new species: 13 of them—more than half—from California, four from Nevada, one from New Mexico, two from Mexico, one from Chile, and one from Japan. It presents revised keys to include the two new genera and the 20 new North American species, but no keys for the new species of Rastrococcus from Chile, or of Balanococcus from Japan. The series of four studies contains descriptions of 58 valid new species of mealybugs now found in California, not counting Chorizococcus microporus(McKenzie (1960)), now considered a synonym of C. lounsburyi (Brain). Keys, Descriptions, and Additional Records Each of the 12 genera in this main section includes one or more new species of mealybugs. In giving new information on morphology, systematic position, distribution, or economic importance of previously described species, the arrangement is arbitrary: For species in any of these 12 genera, such data appear under the appropriate genus in the main part of the paper. A later section gives miscellaneous records on other species.