

















































The perfect insect appears from October till April, 
frequenting wind-swept scrubby hill tops, where its food- 
plant is often abundant. There are probably two com- 
plete broods in a season, the moth apparently passing the 
winter as a larva. 
HUCYMATOGH ANGULIGERA. 
(Phibalapteryx anguligera, Butl., Cist. Ent. ii. 506; Hucymatoge 
anguligera, Meyr., Trans. N.Z. Inst., xli. 5; Hydriomena 
gobiata, Huds., N.Z. Moths, 47, pl. vi. 43.) 
(Plate XII., fig. 22 4, 23 9; Plate L., fig. 46 larva.) 
This species has occurred at Auckland and Wellington 
in the North Island, and at Otira, Dunedin and Inver- 
eareill in the South Island. 
The expansion of the wings is from 14 to 14 inches. Dis- 
tinguished from E£. gobiata by the much more strongly waved 
termen of both fore- and hind-wings, slightly larger size, pro- 
nounced blunt projection in middle of outer edge of median band, 
and the marked pink flush of the undersides. In many speci- 
mens the dorsal portions of the fore-wings and the basal and 
terminal areas of the hind-wings are clouded with reddish-brown 
or dark chocolate brown. There is also considerable variation 
in the depth and strength of the transverse lines and ground 
colour and in some specimens all the markings are extremely 
faint, the pale ochreous-brown ground colour predominating. 
faint, the pale ochreous-brown ground colour predominating 
during the summer months, is about 14 inches in length, elongate 
with the posterior segments considerably stouter; dull greyish- 
or greenish-ochreous; there is an irregular blackish swelling on 
segment 3 and two larger swellings on segments 8 and 9. Younger 
larvae are much more slender and also darker in colour. This 
caterpillar is of very sluggish habits resting motionless on its 
food-plant for many hours at a time. It very closely resembles 
a twig, the black swellings suggesting small lichens. The pupa 
state is spent amongst rubbish on the surface of the ground, 
often without any protective cocoon. 
The perfect insect appears from September till March. 
It is found in scrubby forest, where it may occasionally be 
dislodged by beating, but is more often taken on the flowers 
of the common veronica (V. salicifolia) in the evening. It 
may also be found resting on tree-trunks and fences, in 
the daytime. 
Genus 7—HYDRIOMENA, Hiibn. 
Face with cone of scales. Antennae in @ ciliated. Palpi 
moderate, rough-scaled. Abdomen sometimes crested on two 
basal segments. Fore-wings: areole double. Hind-wings normal. 
(Plate C., fig. 32 head, figs. 33 and 34 neuration of Hydriomena 
deltoidata.) 
A very large genus, dominant in almost all regions, 
and extensively developed in Australia, but comparatively 
much less important in New Zealand where there are six- 
teen known species. Of these one is confined to the North 
Island; six to the South Island; eight common to both 
islands, and one restricted to the Chatham Islands, 



X.—THE GEOMETRIDAE. 
HYDRIOMENA SIRIA. 
(Cephalissa siria, Meyr., Trans. N.Z. Inst. xvi. 98.) 
(Plate xXay fige45: 4) 
This odd little species was discovered by Captain 
Hutton at Dunedin. Since then it has been rediscovered 
by Mr. C. E. Clarke in the same locality, and has also 
occurred in the Waihopai Scenic Reserve, near Invercargill. 
The expansion of the wings is § inch. The fore-wings are 
rich brown with the basal patch and median band darker brown, 
partially edged with dull whitish-ochreous; the median band is 
moderately waved, and considerably broader on the costa. The 
hind-wings are bright orange. The termen of the forewings is 
slightly excavated below the apex, and bowed a little below the 
middle. 
The perfect insect appears in October and November, 
frequenting low lying Kahikatea forest, amongst sedge 
(Carex). It flies like a Chrysophanus and is shy and hard 
to capture. 
Described and figured from specimens kindly given 
to me by Mr. Philpott. 
HYDRIOMENA TRIPHRAGMA. 
(Cidaria triphragma, Meyr., Trans. N.Z. Inst., xvi., 74; Asap- 
hodes siris, Hawth., Trans. N.Z. Inst., xxix., 283; Huds., 
N.Z. Moths, 55, pl. vii., 16.) 
(Plate XII., fig. 40 @.) 
This very distinctly-marked little species has occurred 
at Cape Terawhiti, near Wellington, in the North Island, 
and at Blenheim and on the Otago Peninsula in the South 
Island. 
The expansion of the wings is inch. The fore-wings, which 
have the apex projecting and the termen strongly bowed, are 
very pale purplish-ochreous; or purplish-grey; there is a darker 
basal patch with its outer edge dark brown and strongly convex; 
a dark brown strongly curved transverse line is situated before 
one-third and another transverse line at two-thirds; the second 
line has a strong angular projection in the middle; all these 
darker markings are finely edged with whitish. The hind- 
wings are pale ochreous or purplish-ochreous, darker on basal 
half; there is a faint curved median line. 
The perfect insect appears in September and October, 
and again in March. It seems to be attached to the sea- 
coast, but is evidently a very local species. 
I am indebted to Messrs. Clarke and Hawthorne for 
specimens, 
HYDRIOMENA EXPOLITA. 
(Hydriomena expolita, Philp., Trans. N.Z. Inst., xlix., 240.) 
CBlate ole, iewea2 a.) 
This very distinctly-marked species was discovered by 
Mr. J. H. Lewis at Broken River, Canterbury, and has been 
taken by Mr. W. Heighway at Mount Grey. 
The expansion of the wings is about 14 inches. Although 
very similar to Hydriomena triphragma it may be easily distin- 
guished from that species by its larger size, the much more pro- 
