PROCEEDINGS OF THE Entomological Society of Washington VOL. 41 JANUARY, 1939 No. 1 DESCRIPTIONS OF NEW SPECIES OF MATSUCOCCUS (HEMIP-TERA : COCCIDAE). By Harold Morrison, Bureau of Entomology and Plant Quarantine. The following preliminary descriptions of apparently new species belonging in the coccid genus Matsucoccus are published at this time in order-' to make the names available to economic workers concerned with some of these species, anH in subsequent taxononiic and"biological papers to make easier discussion of the various forms now recognized. It is hoped that the publication of these descriptions will stimulate entomological interest 'in the genus, since it now appears that it is widely distributed through the world on pine hosts, and probably includes several additional new species beyond those here and previously described. The .relationship of some of these species is so close that excellent insect material of all the stages, in quantity, and much further study are needed for their proper characterization, and especially for the establishment of a basis for the accurate differentiation of the species in any stage in which they may be encountered. For a basic characterization of the genus and other details of structure and habit reference should be made to two papers bv F. B. Herbert (Ent. Soc. Wash. Proc, vol. 21, n. 7, Oct. 1919, pp. 157-161, and vol. 23, n. 1, Jan. 1921, pp. 15-22), and for a discussion of the relationship of this genus to other coccids reference may be made to the paper by the present writer on the classification of the Margarodidae (LI. S. Dept. Agr. Tech. Bull. 52, 1928, pp. 48-53). The inconspicuousness of most of the members of this genus is really extraordinary, and on this account the securing of satisfactory study material usually demands painstaking and critical examination of supposedly infested host material. Therefore, there should be special mention of the careful work of Miss Louise M. Russell, of the Bureau of Entomology and Plant Quarantine, who recovered and prepared for study most of the specimens discussed in the following descriptions. She should in each case be given collector's credit for the material obtained as a result of her examination of herbarium specimens of the genus Pinus in the herbaria of the L T nited States National Museum, of the Arnold Arboretum and the Gray Herbarium of
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