Agriculture Reference
In-Depth Information
Fig.
138
Antenna of a hawk moth - family
Sphingidae.
Fig.
140
An ermine moth,
Spilosoma lutea -
family
Arctiidae: subfamily Arctiinae (x2).
31. Family ARCTIIDAE
(subfamily ARCTIINAE)
Medium to relatively large, stout-bodied, broad-
winged moths, often conspicuously marked
and brightly coloured; includes the ermine moth
(Fig. 140)
and tiger moths (Fig.
141);
proboscis
present. Larvae very hairy, the hairs arising in
tufts from verrucae, but with a glabrous, shiny
head; crochets form a mesoseries on each ab-
dominal proleg, with those at each end much
reduced in size
(Fig. 115f).
Pupation occurs in a
flimsy, silken cocoon incorporating the larval
body hairs.
EXAMPLES:
Arctia caja
(garden tiger moth),
Spilosoma lutea
(buff ermine moth).
32. Family NOCTUIDAE
(p. 234
et seq.)
Fig. 139
A lymantriid larva with hair 'pencils'.
Orgyia antiqua -
family Lymantriidae (x2).
The dominant family of Lepidoptera. Adults
usually stout-bodied and powerful flyers, with
a well-developed proboscis; most species are of
drab appearance but some are brightly coloured;
forewings often with a characteristic reniform
stigma
(Fig. 142);
frenulum present. Larvae
rarely hairy
(exception:
subfamily Acronictinae -
hairs arising in tufts and body with distinct dorsal
humps) and most possess five pairs of functional
abdominal prolegs
(Fig. 143)
(exception:
sub-
family Plusiinae - larvae with just three pairs,
hair 'pencils' arising from the first to fourth ab-
dominal segments
(Fig. 139)
or with eversible
glands dorsally on the sixth and seventh abdomi-
nal segments; head often glabrous; body hairs
often urticating.
EXAMPLES:
Euproctis chrysorrhoea
(brown-
tail moth),
Lymantria dispar
(gypsy moth),
Orgyia antiqua
(vapourer moth).
