PROC. ENT. SOC. WASH., VOL. 23, NO. 1, JAN., 1921 15 MARK, L. L. (1877). Beitrage zur Anatomic und Histologie der Pflanzenlause, insbesondere der Cocciden. Arch. f. Mik. Anat., 13, 1877, pp. 31-86, pis. IV-VI. MARLATT, C. L. (1895). The Hemipterous mouth. Proc. Ent. Soc. Wash. Ill, No. 4, 1895, pp. 241-249 r MEEK, WALTER J. (1903). On the mouth parts of the Hemiptera. Kan. Univ. Sci. Bull. II, No. 9, 1903, pp. 257-277, pis. VII-XI. MUIR, F. and KERSHAW, J. C. (1911). On the homologies and mechanism of the mouth parts of Hemiptera. Psyche, XVIII, No. 1, 191 1, pp. 1-12, pis. 1-5. MUIR, F. and KERSHAW, J. C. (1911 a). On the later embryological stages of the head of Pristhesancus papuensis (Reduviidae). Psyche, XVIII, No. 2, 1911, pp. 75-79, pis. 9 and 10. MUIR, F. and KERSHAW, J. C. (1912). The development of the mouth parts in Homoptera, with observations on the embryo of Siphanta. Psyche, XIX, No. 3, 1912, pp. 77-89, 13 figs. NIETSCH, VICTOR (1907). Die Mundtheile der Rhynchoten. Mittheil. des naturw. Ver. f. Steiermark, 44, 1907, pp. 304-311. PETERSOX, ALVAH (1915). Morphological studies of the head and mouth parts of the Thysanoptera. Ann. Ent. Soc. Am. VIII, No. 1, 1915, pp. 22-57, pis. 1-7. SMITH, J. B. (1892). The structure of the Hemipterous mouth. Science, XI \, No. 478, 1892, p. 189. TOWER, D. G. (1914). The mechanism of the mouth parts of the squash bug, Anasa tristis De G. Psyche, XXI, No. 3, 1914, pp. 99-108, pis. 1-11. WITLACZIL, EMANUEL (1882). Zur Anatomic der Aphiden. Arbeit aus dem Zool. Inst. d. Univ. Wien. IV, 1882, pp. 397-441, 3 pis. THE GENUS MATSUCOCCUS WITH A NEW SPECIES. (HEMIP-HOMOP.) BY FRAN T K B. HERBERT, Bureau of Entomolo^v. COCCIDAE, SUBFAMILY MARGARODINAE. The Genus Matsucoccus Cockerel!. COCKERELL, T. D. A. In Can. Ent. XLI, 2, p. 56. (1909.) Type Xylococcus matsumurae Kuwana. This genus was erected by Cockerell in 1908 to contain Xylococcus matsumurae Kuwana, from pine in Japan. He characterized it as follows: "Female without marsupium; broad posteriorly, not elongated, antennae 10-jointed, close together; larva with antennae 7-jointed, and very peculiar crab-like legs, the femur large; male without whorls of long hairs on the antennal joints; caudal brush long, arising from apical segment; rudimentary hind wing with very large hooks. (Japan)."
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