102 Mr. R: Newstead on New Coccidx 
TLecanium hesperidum, Linn., @. 
Hab. Constantine, October and November; on Ficus 
earica ; Convolvulus tricolor, L.; Clematis jflammula ; 
Morus wigra, L, and on Mimosa. As only a few speci- 
mens cccurred on the above-named plants, [ imagine the 
species was not very abundant. 
FEriococcus formicicola. sp.n. (Plate IV., figs. 26, 27.) 
@ Adult elongate ovate, narrowed behind. Antenne (fig. 26) of 
6 joints, 3 longer than 4, 5, and 6 together, has sometimes a central 
false joint with a very faint articulation. Mentum short, biarticu- 
late. Anal ring with 6 hairs. Anal lobes normal. Legs ordinary ; 
tibiz and tarsi, exclusive of claw, in length equal ; digitules to 
tarsi and claw simple. Dermis (fig. 27) above, with many short 
tubular spinnerets ; and at wide intervals a minute spine. Margin 
with a single row of short spines, 
Sac of @ short ovate, convex, slightly attenuated and recurved 
behind ; anal orifice large; white and closely felted. Long. 3-3 25, 
lat. ‘50 mm. 
Sac of ¢ elongate ovate, slightly convex. Colour and texture 
asinthe 2. d¢ unknown. 
, 
Hab. ‘Constantine, 24, x., 795, on wooded slope of 
the Mansourah. Brought up by ants after the first rain, 
and carried underground again within a few days when 
the weather became fine. Apparently a very local 
insect ;” on Cynodon dactylon, L. 
It would seem from the foregoing that prior to the for- 
mation of the sac, this species lives underground in com- 
pany with the ants; but for what purpose the latter 
bring the Coccids to light, after a heavy rain, is a 
mystery. It is very singular too that the Coccids 
should leave their subterranean home and construct 
their sacs on the leaves and stems of the Cynodon, 
as was certainly the case with those specimens sent to me. 
It is the first and only species of Hriococcus known to 
frequent ants’ nests, and is therefore of great interest. 
Eriococcus thymelex, sp.n. (Plate 1V., figs. 28, 29.) 
Sac of the 2 short ovate, slightly produced behind, very convex; 
anal orifice small. Owing to overcrowding of the sacs, they are 
often irregular in form. Long. 3, wide 2 mm. 
9 Adult elongate ovate, narrowed behind. Anal lobes large, 
