112 Transactions of the Boyal Society 0/ South Africa. 
Length of head and body 775 to 1 mm. 
Length of wing 1 mm. 
Length of caudal bristles 308 ^. 
Antennae 10-segmented measuring as follows : — (1) 34 ; (2) 58 ; (3) 68 ; 
(4) 51 ; (5) 51 ; (6) 45 ; (7) 48 ; (8) 44 ; (9) 44 ; (10) 72. 
The adult $ is so densely covered with white, powdery secretion that 
the general body-colour is entirely obscured. The colour impression con- 
veyed, however, is grey — perhaps slightly purplish or brown. There is no 
median, dorsal, clear patch as in citri. All filaments are slender except 
the two caudal ones, which are more delicate than those of cit7'-i. The 
caudal filaments may attain one-third the length of the body. The lateral 
ones are similar to those of capensis in that they are shortest at the 
anterior end, and gradually increase in length towards the posterior 
extremity. 
When mounted the adult ^ is about 2-5 mm. long and 1-5 mm. broad. 
The antennae are uniformly 8-segmented, the range presented from 25 
measurements being :—(l) 34-52; (2) 36-52; (3) 36-50; (4) 24-35; (5) 
24-36 ; (6) 24-34 ; (7) 28-40 ; (8) 88-102. 
I. 
11. 
III. 
IV. 
V. 
VI. 
VII. 
VIII. 
IX. 
130 
120 
110 
100 
90 
80 
70 
60 
50 
40 
30 
20 
10 
0 
1 
mm 
P . burnerae . 
It may be of interest to record the variation in antennal range of 
measurements on three host-plants. 
{a) On granadilla, collected December, 1914, in Pretoria : — (1) 40-52 ; 
(2) 44-52 ; (3) 44-50 ; (4) 27-34 ; (5) 32-36 ; (6) 27-34 ; (7) 35-40 ; (8) 
92-102. 
