ART. 17 MASKELL ASTEEOLECANIINAE MORRISON" 15 



Genus CEROCOCCUS Comstock 



No attempt is made in the following discussion of the Maskell 

 species that have been placed in this genus to indicate critically their 

 relationships to the remainder of the species assigned to Cerococcus 

 nor their relation to the genotype, Cerococcus quercus Comstock. 

 Some examinations of supposedly congeneric species have been made 

 but no critical conclusions have been reached. 



Certain of the species now included here have had somewhat varied 

 careers. C. hryoides and C. stellata^ for example, were originally 

 placed in Asterolecanivmv (actually in Planchonia). Even more 

 curious was the assignment of C. paradoxus and G. indicus, which 

 Maskell regarded as anomalous members of the genus Eriococcus. 

 The incorrectness of this placing was first noted by Mr. E. E. Green, 

 who correctly demonstrated their relationship to the oriental and 

 Australasian species of Cerococcus.^ 



CEROCOCCUS BRYOmES (Maskell) 



Plate 7, figs, 1-15 ; Plate 8, figs. 1-8 ; Plate 28, fig. 1 



References. — Fernald, Cat. Cocc. World, 1903, p. 58. — Froggatt, 

 Agr. Gaz. N.S.Wales, vol. 26, 1915, p. 1056. 



The Maskell collection includes four slides of this species, one of 

 " adult female, 1893," one of "spinnerets and anal tubercles, 1893," 

 one of " larvae after hatching, 1893," and one of " larvae, embryonic, 

 1893." These are all rather poor. From the unmounted material, 

 included under No. 338, a single adult female has been secured. The 

 limited Maskell material has been supplemented in the following de- 

 scription by several mounted specimens, collected in Fiji by Mr. 

 Albert Koebele and by Mr. George Compere. 



Adult female. — Test as described by Maskell, body as mounted 

 practically as wide as long, with the posterior extremity protruding, 

 total length about 1.9 mm., width, 1.8 mm.; derm membranous 

 throughout, excepting inner faces of anal lobes and the small disks 

 bearing the cribriform plates; antennae reduced to small unseg- 

 mented tubercles, slightly invaginated and bearing several stout 

 sensory setae apically; legs lacking; spiracles with broad but only 

 faintly chitinized bar, a narrow median section heavily chitinized; 

 beak short conical, incompletely 2-segmented; no spiracular spines, 

 marginal setae, as such, not evident, derm with an occasional minute 

 seta dorsally and ventrally, these largest, but still quite small, ven- 

 trally in the region of the genital opening; 8-shaped pores numerous 

 and conspicuous over the dorsal surface, in two distinct sizes, the 

 larger with a maximum largest dimension of about 21/x, the smaller 



» Green, Journ. Econ. Biol., vol. 5, 1910, p. 5. 



