170 
Transactions of the Royal Society of South Africa. 
The slides, which are dated 1895, are in excellent condition. The 
following particulars concerning them may be of use in the determination 
of slide material : — 
Larva (mounted) : About 0-8 mm. long. Antennae 6-jointed about 
0-46 mm. long without terminal setae. 
Longest terminal setae about 0*2 mm. long. 
Caudal extremity with 4 long setae, the longest of which are about 
0-8 mm. 
The measurements of the antennal segments of three specimens on 
this slide are : — 
1. 
11. 
111. 
iv. 
V. 
vi. 
A. 
44 
68 
62 
58 
48 
136 
48 
68 
68 
50 
48 
136 
B. 
52 
68 
68 
54 
48 
142 
40 
68 
62 
50 
48 
142 
C. 
44 
68 
62 
54 
52 
140 
48 
68 
65 
54 
52 
142 
The setae around the margin, on the first abdominal segments, are 
about 0-4 mm. long. 
The derm has a number of large disc-like glands with a broad-beaded 
edge similar to those of I. euphorbiae. 
Adult ? (mounted) : Slide A measures approximately 8 mm. long and 
5 mm. broad. Slide B 10 mm. long and 5 mm. broad. 
Antennae : — 
i. ii. iii. iv. v. vi. vii. viii. ix. x. xi. 
A. 153 146 140 80 102 92 100 90 90 102 170 
153 153 162 88 95 80 85 88 102 102 156 
B. 170 180 176 102 102 118 115 130 120 120 215 
170 192 185 118 115 118 130 136 136 136 215 
The antennae of slide A are somewhat shrunken, so that those of B are 
probably nearer the average. The derm has hairs and large and small 
glands all somewhat similar to those of I. seychellarum. The larger pores, 
however, are much fewer in number. 
Habitat : On Cliffortia serrulata (Engl.) Diels. (Bosaceae), near 
Eichmond, Natal. Collected by Arnold W. Cooper. 
Eemarks : This seems to be an extremely uncommon species which is 
restricted to a single host-plant. The reference given for host-plants, 
(Fernald, p. 25), is undoubtedly an error. Early in 1900 Claude Fuller dis- 
cussed this species with the late Eev. Ward and A. W. Cooper, and in 
