X.—THE GHOMETRIDAEL. 89 
costa. In the female the costa of the fore-wings is straighter, 
and the inner and outer edges of the median band are bordered 
by blackish-brown lines. The hind-wings are whitish-grey with 
many faint grey wavy lines, but no grey patch on the costa. 
The sexual differeuces in this species are very remark- 
able. 
The perfect insect appears in ‘March and April. It 
is very common throughout Australia, and has probably 
been introduced into New Zealand by artificial means. It 
also occurs in the Kermadee Islands. 
PHRISSOGONUS TESTULATUS. 
(Phibalapteryx testulata, Guen, Lep. x., 352; Scotosia denotata, 
Walk., Cat., xxv., 1861; Phibalapteryx parvula, Walk. Cat. 
xxvi., 1721; Phrissogonus denotatus, Meyr., Trans. N.Z. 
Inst. xx., 58; Proc. Linn. Soc. N.S.W.,'1890, 798; Huds. N.Z. 
Moths, 45, pl. vi., 19.) 
(Plate XI. fig. 7 4.) 
This very dull-looking insect is common and generally 
distributed throughout the country, and has occurred in 
the Chatham Islands. 
The expansion of the wings is ? inch. All the wings are 
greyish-ochreous, with numerous obscure brown transverse lines; 
there is often a dark brown blotch in the dise of the fore-wings 
and several black dots on the veins; the cilia are dull pink 
barred with black. The male has a peculiar dilation on the 
costa beyond the middle, beneath which is a naked longitudinal 
mark occupying the space between veins 10 and 12, these veins 
being slightly distorted in consequence. The antennae are 
simple in both sexes. The female’is slightly tinged with reddish- 
brown and it is by no means easy to separate the female of P. 
testulatus from the female of Chloroclystis semialbata. 
The perfect insect appears from October till February. 
It frequents dense undergrowth in the forest, and is gener- 
ally found resting with extended wings on tree-trunks 
where it is practically invisible. 
This species is found in the Kermadec Islands, and is 
common and widely distributed in Australia and Tas- 
mania. 
Genus 5.—CHLOROCLYSTIS Hiibn. 
Hace with small cone of scales. Antennae in 4 ciliated 
or simple. Palpi moderate or long, rough-scaled. Abdomen 
slightly crested., Fore-wings: areole simple, 11 running into 
12. Hind-wings normal. (Plate C., figs. 19, 20 neuration of 
Chloroclystis bilineolata.) 
A rather extensive genus, well represented in India; 
occurring also in Africa, Europe and Australia, but nowhere 
sO prominent as in New Zealand. 
This very interesting genus includes no less than 
thirty-three New Zealand species, of which six are confined 
to the North Island, nine to the South Island, and eighteen 
common to both islands. Most’ of the insects are of 
moderate or small size, and are often very variable. Many 
are extremely beautiful with the wing patterns of great 
complexity. The larvae principally feed on blossoms, 
attaining full growth with unusual rapidity, the duration 
of larval life being necessarily limited to the period during 
which the foodplant is flowering. The pupa state is often 
very prolonged, some of the species passing the winter in 
that’ condition, and in these cases the perfect insects 
usually emerge shortly before their foodplants burst into 
flower. Owing to their extreme variability, there is often 
great difficulty in fixing the limits of the species, and 
further extensive investigations will be required before an 
adequate knowledge of them is obtained. 
This genus is, in fact, a field in which much original 
work remains to be done by future naturalists, especially 
in connection with breeding the more difficult forms, some 
of which are at present very imperfectly known. It is 
also very probable that further new species of Chloro- 
clystis will be discovered in some of the less explored dis- 
tricts, which have not yet been properly worked by 
collectors. 
When identifying many of the difficult and extremely 
variable species included in this genus, special notice should 
be taken of the length of the antennal ciliations and, in 
order to facilitate this, the species have been grouped into 
three sections in conformity with this character. 
Section A. Antennae in male simple. 
CHLOROCLYSTIS INDUCTATA. 
(Corenia inductata, Walk., Cat. xxv., 1322; Scotosia subitata, ib., 
1362; Cidaria semilineata, Feld., Reis. Nov. pl. cxxxi.,36.) 
Q. Dull fawn-colour, slender. Palpi obtuse, slightly 
ascending, extending somewhat. beyond the head. Antennae 
rather stout Wings rather small. Fore-wings somewhat obtuse 
at the tips; interior line black, slender, oblique, nearly straight, 
hardly denticulated; a black exterior discal streak; costa and 
veins slightly marked with black; submarginal line pale cinereous, 
zig-zag; marginal line black; exterior border slightly convex, 
very oblique. Hind-wings cinereous, with traces of lines along 
the interior border; exterior border slightly truncated in front 
and hindward. Length of body 44 lines; of the wings 10 lines. 
I am unacquainted with this species. The above is 
copied from the original description, 
CHLOROCLYSTIS SHEMIALBATA. 
(Hupithecia senvialbata, Walk., Cat., xxvi. 1708; Meyr., Trans. 
N.Z. Inst., xlv., 23; Hupithecia indicataria, Walk., Cat., 
xxvi., 1708; Meyr., Trans. N.Z. Inst., xx., 52; Huds. Sub- 
antarctic Islands of N.Z. pl. II., 20-22.) 
(Plate XI., fig. 5 4,69. Plate lL, fig. 42 larva.) 
This rather dull-looking species is common and gener- 
ally distributed throughout the country. It is also found 
at Stewart Island, and in the Auckland, Chatham and 
Kkermadee Islands. 
The expansion of the wings is slightly under § inch. The 
fore-wings of the male are usually very pale greenish--grey or 
reddish-grey with numerous blackish or dull reddish wavy trans- 
verse lines, darker on the main veins; there is usually a distinct 
pale somewhat crescentic mark near the termen above the middle 
with a rust-red spot beyond it. The hind-wings are pale grey, 
with several faint wavy transverse lines; the termen has a large 
rounded projection near the middle. The female, which is diffi- 
cult to identify, is browner than the male, the transverse lines 
are more numerous and distinct, especially on the hind-wings, 

