74 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XIII. 
Aonidia on the absence of the larval pellicle and superposed secretion, I am 
not quite convinced of the necessity for this separation. ‘The species discrib- 
ed above forms a link between typical Aonidia and Gymnaspis, I consider 
that the absence of the larval pellicle is an accident due merely to the hemis- 
pherical form of the second pellicle, combined with its highly polished surface, 
which offers no hold to the larval skin, The absence of a secretionary area 
is no doubt partly due to the same causes. There is originally a complete 
layer of the usual secretionary matter, which is subsequently ruptured by the 
upward development of the second pellicle, and may gradually fall away. In 
the case of spatulatu the secretion persists as a broad marginal zone, The 
characters of the several species of Aonidia,—especially as represented in 
Ceylon ,—are so varied that a subgenus might almest be created for each one, 
At present, as their number is still so small, and as they are undoubtedly 
united by general structure, they may be conveniently included in the ori- 
ginal genus. 
AONIDIA CRENULATA, n. sp. (PI. D, Figs.. 14, 15.) 
Female puparium (fig. 14) circular, moderately convex. 
Dull pale reddish oc yellowish-brown, with darker zones caused by the 
transmitted colour of the sublying pellicle. First pellicle elevated, sub-central ; 
yellow, median area blackish. Second pellicle almost completely occupying 
the puparium, castaneous-brown, concealed beneath the fulvous secretionary 
covering. Above the posterior extremity is a distinct pale semilunar mark, 
rendered more conspicuous by a blackish suffusion immediately above it. This 
mark might be supposed to define the position of the pygidium of the second 
pellicle, but does not in reality correspond with it. A similar false pygidium 
is noticeable in the puparium of Parlatoria aonidiformis. Diameter 1 mm. 
Male puparium similar in size and colour to that of female, but flatter and 
slightly oval. 
Adult female creamy white, tinged with lilac in older examples: irregu- 
larly circular. The pygidium, in advanced stage, withdrawn into the abdo- 
minal region : the extremity without true lobes, but with a series of remark- 
able floriated processes, 12 on ‘each side (fig. 15), corresponding to the dilated 
processes in spatulata, There are small chitinous thickenings of the margin 
at the base of some of the processes (about 3 on each side) that may perhaps 
represent the suppressed lobes, Total length of insect about 0°50 mm, 
Adult male not known, 
The extremity of the second pellicle resembles that of an adult Parlatoria, 
with broad fimbriate squames and semilunar pores between the lobes. 
Habitat:—On upper surface of leaves of Memecylon umbellatum, in the 
Royal Botanic Gardens, Peradeniya, near Kandy. 
AONIDIA MESUA, n, sp. (Pl, D, Figs. 16, 17, 18), 
Female puparium (fig.16) circular: reddish-brown, with a paler zone 
marking the position of the: second pellicle : secretionary area covering and 
