ART. 12. MASKELL GENERA OF COCCIDAE MORRISON. 63 



Green's elaborate figures and description. G. africana McFie also 

 differs in morphological characters from the type of the genus, and 

 can hardly be included in it on such grounds. The writers are not 

 able to suggest any other genus location for the last three species 

 discussed, but do believe that, at most, only the three Australian 

 species can be legitimately included in the genus Ceronema. 



The following generic diagnosis is based almost wholly on the type 

 species : 



GENERIC DIAGNOSIS OF CERONEMA. 



Coccine forms (of Fei'nald Catalogue), female at maturity sur- 

 rounded by a heavy secretion of waxy threads covering all of the 

 body except a portion of the dorsum; adult female with heavily 

 chitinized dorsal derm with numerous pore canal punctures, 6-seg- 

 mented antenna, normal legs, normal spiracles, slender acute margi- 

 nal setae, numerous, stout, bluntly rounded spiracular spines in the 

 usual four groups, each accompanied by a chitinized plate, with 

 minute setae dorsally, derm pores dorsally of three types, minute 

 simple pores, large tubular ducts and " submarginal tubercles," all 

 numerous, ventral pores small tubular ducts and two sizes of multi- 

 locular disk pores, anal plates slender, tapering posteriorly, no dorsal 

 setae on these, some apical setae, a few ventral setae, no fringe setae 

 apparently, no hypopygial setae, anal ring placed anterior to plates, 

 small, with pores and eight setae ; larva elongate, tapering posteriorly, 

 legs and antennae very long and slender, spiracular spines subequal in 

 length, all stout, blunt, with submarginal and submedian large con- 

 spicuous tubular ducts, anal ring with 6 setae, anal plates slender, not 

 reticulated, bearing an apical seta about half as long as body. 



The characters presented by the type of this genus seem quite sufll- 

 cient to justify its retention. 



Genus ERIOCHITON Maskell. 



Plate 3, fig. 5. 



Genotype. — Eriochiton hispidus Maskell. 



Reference.— FQvndld, Cat. Cocc. World, 1903, p. 127. 



The type of this genus was automatically set by Maskell in describ- 

 ing it with only the single included species, although the first definite 

 statement regarding a type species appears to be that in the Fernald 

 Catalogue. 



The Maskell collection contains only a single slide of the species 

 labeled " adult female from Olearia, 1880," and a few unmounted 

 specimens in different stages under No. 59. From the latter it has 

 been possible to obtain mounts of the larva. 



Adult female. — Short oval, almost elliptical, slightly convex, derm 

 clearing completely on boiling in potassium hydroxide; antennae 



