The Coccidae of South Africa. 
125 
Legs : The measurements in fx for the legs approximate : — 
I. 
66 
100 
235 60 
138 
30 
102 
II. 
68 
108 
256 75 
173 
34 
105 
III. 
78 
120 
282 78 
230 
38 
116 
Setae of anal lobes may reach 240 ix in length. 
Setae of anal ring may reach 132 in length. 
^ : The $ puparia are apparently hidden amongst the clusters of $ 
ovisacs. A number of the latter were picked off and placed in a tube 
when collected on November 9th so as to obtain a quantity of larvae. 
By November 16th two males had emerged, and were mounted. They 
were of the usual type, with head and body brown in colour, but the 
whole insect was exceptionally densely powdered. They have two long 
caudal filaments, about as long as the head and body combined without 
the antennae. The measurements are as follows 
Length of head and body 0-82 mm. 
,, antennae 0'75 mm. 
,, wing 0*6 mm. 
Antenna 10-segmented :— (1) 30 ; (2) 64 ; (3) 84 ; (4) 40 ; (5) 44 ; (6) 44 ; 
(7) 40; (8) 40; (9) 40; (10) 47. 
Habitat : On Acacia cajfra and A. rohusta, Pretoria District, collected 
by the writer, and on A. horrida Grahamstown, Cape Province, collected 
by C. P. Lounsbury, January, 1899. 
Eemarks : This species was first observed at Pretoria in September, 
1914, when solitary females were observed scattered over the trees, often 
partly hidden beneath the ovisacs of Ps. solitarius. Specimens were 
collected and mounted, and the pseudo-articulation of the 8th segment 
was noticed, but as this was at the end of winter it was thought that this 
character was associated with the season. Some species, such as Ps. 
trifolii Forbes, and Ps. agrifoliae Essig, are known to have two distinct 
seasonal generations, the winter form with 7-jointed antennae, and the 
summer one with 8. 
By the end of October, however, Ps. solitarius had almost disappeared, 
and large numbers of Ps. quaesitiis were found aggregated at the bases of 
leaves and thorns, the clusters of ovisacs forming conspicuous masses. 
On November 9th many young had emerged and had collected at the 
bases of the leaf-stalks, their pink colour and collective habits reminding 
one of Ps. sacchari Okll. 
A week later an old acacia-tree was observed on one of the hills which 
surround Pretoria, in which were a number of holes, obviously from early 
wounds. The openings to these were nearly closed by rough bark and 
accumulations of resinous gum, but the vast numbers of ants entering and 
leaving the holes plainly showed the presence of some attraction. On 
