156 
4th instar. Similar to preced- 
ing instar, but tubercles compara- 
tively smaller and not armed with 
terminal sete. 
5th instar. Oblique  silvery- 
white carina on second abdominal 
Entire body 
closely covered by dark green 
segment very large. 
round spots. Stigmata green. 
Inferior lateral whitish band 
raised. Abdominal feet with only 
a very few sete. Segments dis- 
tinctly angulated superiorly. 
Pellets of frass of the caterpillar 
in its final instar of normal size. 
Caterpillar easy to rear in first 
two instars. Is found at Salis- 
bury from early in November to 
middle of January. 
Imago. 
Upper-side. 
olive-ochreous, light mouse-grey, 
Fore-wing light 
orange-ochreous to bright orange- 
red, much paler near the outer- 
margin. ‘Transverse sinuous bands 
distinct or faint, very rarely 
altogether wanting; the post- 
median band distinctly angled at 
nervule 7. 
Rhodesian Moths 
Similar to third instar, but no 
lateral dark-green spots. 
No oblique carina on second 
abdominal segment. Dorsal area 
only with dark green spots ; hence 
the caterpillar looks much lighter 
than that of natalensis. Stigmata 
very dark red purple. Whitish 
inferior lateral band not raised. 
Abdominal feet rather closely set 
with sete inferiorly. Segments 
all evenly rounded, not angulated 
superiorly. 
Caterpillar in final instar drops 
pellets of frass of enormous size, 
which at once indicate that the 
larva of macrothyris is feeding on 
the tree. 
Caterpillar delicate and very 
difficult to rear in first two instars. 
Is found at Salisbury from about 
the middle of January to the 
middle of March. 
Fore-wing much darker mouse- 
grey or mouse-brown, often with 
a greenish, more rarely, reddish or 
lilac flush; mauve or lilac near 
outer-margin. Very rarely the 
entire wing is deep orange-red, 
bright lilac near the outer-margin. 
No trace of any transverse sinuous 
band in nearly allexamples. Very 
rarely a faint post-median band, 
hardly sinuous and not angled at 
nervule 7. 
