94 ROBERT NEWSTEAD—OBSERVATIONS ON 
Pulvinaria psidii, Maskell. 
On Alternanthera versicolor, Eutebbe, Uganda, 1. VIII. 1910 (C. C. Gowdey) ; 
and on Coffee, Mabira Forest, Uganda, 15. [X. 1910 (C. C. Gowdey). 
Judging by the number of females present upon the leaves submitted, this 
insect must cause serious injury to the coffee plant. 
Ceroplastes uganda, sp. n. 
Test of old adult female-—Hemispherical, surface uneven and coarsely wrinkled, 
due evidently to shrinkage ; not divided into “ plates ;” lateral margin on each 
side with a short and very broad arm-like extension which slightly overlaps the 
branch, if a slender one, to which the insect is attached ; posterior portion may 
be broadly bilobed and slightly recurved. Colour dull crimson with irregular 
greyish ochreous areas, the latter being probably due to abrasions of the surface. 
In the comparatively fresh examples, the wax yields to pressure and contains a 
large percentage of moisture. In the very old examples, the test becomes brittle 
and cellular, Length, 13-14 ; width, 11-12; height, 11-12 mm. 
Female, adult.—Hemispherical, dorsum obconical, with a very distinct tubercle, 
the apex of which is furnished with a minute sharp ridge ; there is a similar ridge- 
like tubercle on either side of the rudimentary caudal process, and one also over 
each of the posterior stigmatic clefts. Cephalic lobe, strongly produced in the 
young adult female, much less so in old examples. Derm uniformly and strongly 
chitinised ; piceous; surface almost covered with rather widely separated 
papille ;* by transmitted light these papillae appear as small ovate glands 
(fig. 8, b) in examples which have been macerated in potash. Stigmatic clefts 
(fig. 8, a) rather shallow, and immediately above them is a large broadly ovate 
Fig. 8.-Ceroplastes ugand@, Newst ; a, stigmatic cleft ; b, dorsal pores ; c, parastigmatic glands ; 
d, spine of the stigmatic cleft. 
group of circular pores (fig. 8, ¢). Spines (fig. 8, d) short, simple and not con- 
fined to the margin. Diameter, 7-8 ; height, 6-7 mm, 
On “ Amakebe,” Uganda (C. C. Gowdey). 
* These are absent in a parasitised female, and the derm is thin and much more highly 
polished.—R. N. 
