On new and little-known American Coccidae. 155 



tlie products of fission never resemble bud or larval polyps. 

 The first seeins best understood as a modified form of 

 buddiii.i;, the organs of the bud liaving come into intimate 

 association with those of the parent polyp, so that separation 

 of tiie two involves the division of the mouth, stomoda3U u, 

 disk', and tentacular syste:n (tiisiparous gemmation). 



/. Ajiparcnily true discal gemmation may take place in 

 species which usually reproduce by columnar budding. 



Rfferences. 



]90D. Bernard, II. M. "On the Stiur-ture of Pontes, with Prelimi- 

 nary Xo:e.-i on the Snft Pitrt-," .loiirn. Linn. S )C., Zo )1. vi.l. xxvii. 



1901. VKrmiT,L, A. E. '• Variations and Nomenclature of Bermudian, 

 "SN'est Indian and Brazilian Reef-Corals, with Notes on various 

 Indo-Pacitic Corals," Tran-s. Conn. Acad. Science, vol xi. 



1902. Dl'p:rden, J. E. "The Morphology of the Madreporaria. — 



II. Increa.^se of Me.-^enteries in Madrepora beyond the Proto- 

 cneniic Stage," Ann. & Mag. Xat. Hist., ser. 7," vol. x. 



1902=*. . " The Morpholo^-y of the Madreporaria.— HI. The 



Significance of Budding and Fission," Ann. & Mag. Nat. Hist , 

 ser. 7, vol. x. 



XVIII. — Xew and litlle-hnown American Coccid*. 

 I3y T. D. A. CocKEiiiiLL. 



Cardiococcus, gen. nov. 



A Lecaniine Cocci 1 allied to Ingh'sia &c. ; legs and an- 

 teiinai small or rudimentaiy ; insect covered by a brittle 

 waxy scale, with a dorsal pit or foramen. 



Type C. umbonatus. 



Cardiococcus umbonatus, sp. n. 



? . — About 2 millim. longj covered with white waxy 

 seciction, elevated ; low-conical as seen from the side, with 

 iiunu rous longitudinal stride ; nearly round as seen from above, 

 with a huge and deep central pit, the waxy secretion radi- 

 ating irom two contiguous rounded umbones, the wdiole 

 shaped like the shell of the genus Hemicardium. No lateral 

 Iringe. The w ax is rather opaque ; the longitudinal (vertical) 

 grooves are minutely cross-grooved, but I cannot se^ any 

 titfiiiite air-cells, benuded insect very shiny, dark brown, 

 mere or less veitically striated, llemoved irjm the twig, the 

 female leaves a dense white waxy pad. Legs and antennae 



