258 Pulvinaria. 
PULVINARIA, Targiont-Tozzette 
Pulvinaria, Targ., ‘Catalogue,’ p. 34 (1869). 
Adult female resembling Zecanzizm in the early stages and until the com- 
mencement of oviposition, when a loose cottony ovisac is secreted from below 
the posterior extremity of the insect, for the protection of the eggs. The body 
of the insect is tilted up during the formation of the ovisac, and often becomes 
much shrivelled and distorted, finally remaining as a small shapeless scale at 
the anterior extremity of the mass of the ovisac. It is sometimes rendered 
still more inconspicuous by the partial overlapping of the secretionary matter, 
but is never completely enveloped. In all purely structural characters there is 
nothing to distinguish species of this genus from those of Zecanzum, so much 
so that, until the period of oviposition, it would be impossible to determine 
whether an individual should be placed in the one or the other genus. The 
ovisac may be short and thick, as in pszdzz, or elongated, as in ¢hespeste - it may 
be smooth, transversely corrugated, or longitudinally ribbed: there is nearly 
always a median longitudinal depression, due to the bilateral arrangement of 
the ceriferous glands. 
Male puparium glassy, divided into distinct plates, as in Lecanwm. 
Adult male similar to that of Lecanzum. 
SYNOPSIS OF CEYLON SPECIES. 
A. Ovisac elongate ; margin of female set with stout spines ¢hespesie, p. 259. 
B. Ovisac comparatively short and stout. 
(2) Ovisac longitudinally fluted: dorsum of female tessel- 
lated; anal operculum elongate ...... pegas00000 .. dessellata, p. 260. 
(6) Ovisac not fluted. 
(a!) Living female with pigmented derm cells ... cellulosa, p. 262. 
(6!) Living female without pigmented cells. 
(a?) Marginal hairs of female broadly dilated fpszdzz, p. 264. 
(67) Marginal hairs not conspicuously dilated. 
(a*) Marginal hairs very long; considerably longer 
than stigmatic Spin€S ......0.....:0.0. ZVO7@, p. 266. 
(6°) Marginal hairs pointed; shorter than stig- 
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