Euthoracaphis Takahashi (Hemiptera: Aphididae: Hormaphidinae), a generic account, description of a new species from China, and a key to species Author Chen, Jing Author Fang, Yan Author Qiao, Gexia text Zootaxa 2009 2284 30 40 journal article 10.5281/zenodo.191248 448bea35-2e43-4b85-b167-6b852356b919 1175-5326 191248 Euthoracaphis umbellulariae (Essig) ( Figs. 35–37 ) Thoracaphis umbellulariae Essig, 1932 : 4 ; Takahashi, 1935 : 140 . Thoracaphis cinnamoniae Shinji, 1941 : 1133 . Euthoracaphis umbellulariae (Essig) : Takahashi, 1959 : 8 ; Hille Ris Lambers, 1966 : 584 ; Eastop & Hille Ris Lambers, 1976 : 197 ; Blackman & Eastop, 1994 : 691 ; Remaudière & Remaudière, 1997 : 186 . Specimens examined. JAPAN : 7 apterous viviparous females, Wakayama, 26 Jan. 1958 , No. E572, on Cinnamomum japonicum , coll. M. Sorin (ZMCAS). Distribution. Japan , North America . Host plants. Cinnamomum camphora , C . camphoratum , C. japonicum , C. pedunculatum , Sassafras variifolium , Umbellularia californica . Biology. Apterae are black, covered with white wax ( Essig, 1932 ), on the undersurface of leaves along ribs ( Takahashi, 1959 ), often making trees sooty black ( Hille Ris Lambers, 1966 ). Populations in California are anholocyclic ( Blackman & Eastop, 1994 ).