100 Mr. R. Newstead on New Coccidx 
Planchonia ilicis, sp.n. (Plate IV., figs. 18, 19.) 
Test of adult ? glassy, almost circular, convex ; constricted at 
the margin by the first pair of spiracles, but this character is incon- 
stant, and often asymmetrical ; anal orifice very large and slightly 
produced ; margin carinate ; without cilia. To the naked eye the 
colour is bright, shining, greenish yellow; with the anterior half, 
or anterior margin, bottle-green, sometimes inclining to brown. 
Under the microscope the yellow colour is seen to be due partly to 
the numerous effete larval skins ; and the darker colour in front to 
the shrivelled body of the 9. Theold weathered examples present 
a greyish appearance, Ventral surface of test with the anterior half 
dark-brown ; posterior kalf and margin pale greenish yellow ; the 
line of separation between the colours abrupt. Diam. 1°50 mm. 
9 Adult cirenlar. Rudimentary antennz disc-lke and with- 
out hairs. Mentum monomerous; unexpanded filaments about 
same length as mentum. Anal lobes minute, each with a single 
long hair,and between them two shorter ones. Anal ring small, 
simple, and apparently without hairs. Dermis (fig. 18) above, with 
very long tubular and circular spinnerets (a) : the former most 
numerous near the margin; there is a complete single row of 
figure-of-eight spinnerets (c) placed close together all round the 
margin ; and near the anal ring a small group of 4 or 5 of the 
form shown at (D). 
Test of the ¢ elongate, with a faint median carina, and distinctly 
segmented. Margin (fig. 19) with a fringe of short glassy filaments 
arranged in pairs, curved outwards, and meeting together at the tips, 
somewhat like a pair of callipers. Long. 1 mm. 
Hab. ‘Constantine, 23, x.,’95, top of extreme corner 
of the spur of M’cid opposite the Kasba, on the scrub. 
‘he same scale occurs plentifully on the Mansourah, near 
the source of Sidi M’cid. Colour of Coccid, during life, 
bottle-green below, dusted above with lght-yellow. 
Much infested by a parasitic Hymenopteron.” 
This is a brilliant species ; and in its structural charac- 
ters difficult to separate from P. ilicicola, Targ. Tozz., 
but the absence of a marginal fringe at once distinguishes 
it from the latter. There can be no doubt as to the 
atsence of the fringe, as I possess a large number of 
specimens in the most perfect condition. 
