104 
Transactions of the Royal Society of South Africa. 
The average size of $ insects (containing ova) when mounted is 
1-7 mm. long and 0*8 mm. broad. 
The antennae are 7-segmented, the joints exhibiting the following 
range of variation :—(l) 27-34; (2) 27-31; (3) 10-17; (4) 11-19; (5) 
10-17; (6) 20-27; (7) 61-65. 
The eyes are comparatively small and inconspicuous. 
The legs approximate : — 
I. 
34 
51 
120-136 
30 
71 
17 
58 
II. 
40 
56 
130-140 
30 
75 
17 
61 
III. 
40 
56 
140-154 
34 
90 
17 
68 
The setae of the anal lobes may attain 112 ^ in length; those of the 
anal ring average 82 /.t. 
The dermis is characterized by the usual gland-pores and a few 
scattered bristle-like hairs. The gland-pores of the venter are small and 
simple ; those of the dorsum larger and disc-like (Fig. 15). There are 
no definite marginal gland areas. 
Habitat : On grass in front of Union Buildings, Pretoria. Collected 
by the writer November 20, 1914. 
Material studied consists of 8 adult ? $ and numerous larvae. 
Collection No. : B 52. 
11. PSEUDOCOCCUS SOLITARIUS Sp. n. 
(Plate XVIIL, Fig. 16.) 
Adult $ with ovisac : The adult ? before secreting the ovisac is 
active, but comes to rest on the stem of Acacia, either in the axil of a 
leaf or at the base of a short stem or thorn. Although as many as six 
insects have been found on the same twig, in no case have two been found 
forming their ovisacs at the same point. 
At first a thin layer of cottony matter is secreted, and this increases in 
amount until it appears as a round or broadly oval disc below the insect. 
In a few instances the ? was situated towards the anterior end of the sac, 
so that the head was in contact with the twig and the ovisac protruded 
beneath and behind her. When completed the ovisac is usually spherical, 
nearly twice the width of the insect in diameter, with the $ on top. 
Occasionally the uppermost fibres of the sac partly or wholly enclose the 
5 , but as a rule this is not the case. 
Ova : An exceptionally large number of ova are produced by the adult 
2 . They are dark purplish-brown in colour, but turn black in boiling 
KOH. 
Larva : Elongate, active, purplish in colour when alive, greenish when 
