106 Transactions of the Boyal Society of South Africa. 
The setae of the anal lobes average 170 long ; those of the anal ring 
are approximately 120 ^ in length. 
Mentum large (150 fi), tapering acutely to the tip (Fig. 16). 
^ : Not yet observed. 
Habitat : On thorn-trees (Acacia spp.), common in and around Pretoria. 
Collected by the writer, September and October, 1914. The succeeding 
generation v^as observed, still solitary, v^ith ovisacs completed 
December 20, 1914. 
Material studied consists of numbers of adult $ ? with ovisacs and 
14 2 ? cleared, stained and mounted. 
This insect, in some respects, seems to be intermediate between 
Ps. hymenoclea (Ckll.) and Ps. filamentosus (Ckll.), but it is certainly 
distinct. Ps. acaciae (Mask.) and Ps. alhizziae (Mask.) are also in this 
series. The latter has 8-jointed antennae, but acaciae must be very 
similar to the species under discussion but smaller; the size given by 
Maskell being " length about 1/25 inch." 
Collection No. : 65. 
SEKIES B, WITH EIGHT-SEGMENTED ANTENNAE. 
12. PsEUDOCOCCus ADONiDUM (Linn.) Westw. 
The antennal chart for this common species is given to complete 
the series. 
I. 
11. 
111. 
IV 
V. 
VI. 
vn. 
VIII. 
IX. 
130 
120 
110 
100 
90 
80 
70 
60 
50 
40 
30 
20 
10 
■^.-'■(^ 
p. adcJnidum, 
