X.—THE 
This species somewhat resembles Hydriomena deltoi- 
data, It is, however, a less robust-looking insect, and the 
transverse lines in H. deltoidata are always much straighter 
than in H. hemizona. 
The perfect insect appears from December till Feb- 
ruary, and frequents beech forests, usually at elevations of 
3,000 feet above the sea-level. As a rule it is a rare 
species, but is sometimes quite common in the Routeburn 
Valley beyond the head of Lake Wakatipu. Mr. Philpott 
informs me that it occurs in the utmost profusion on the 
Hunter Mountains. 
HYDRIOMENA HAEMOPHABA. 
(Hydriomena haemophaea, Meyr., Records of Canterbury Museum 
CNEZe ilies Oye 20.) 
(Plate =x VAIL fie. 20A\.) 
A single specimen of this species, in rather poor con- 
dition, was taken by Mr. C. Lindsay, at Whangamarino, 
Chatham Islands. 
The expansion of the wings is fully 14 inches. The fore- 
wings are reddish-brown, of somewhat variable intensity; basal 
area slightly clouded with blackish on costa; sub-basal patch 
irregularly clouded with dull reddish, becoming dull ochreous 
near costa; inner edge of median band marked by a fine reddish- 
brown line, with two acute angulations towards termen; a dis- 
tinct black discal dot at apex of costal angulation; median band 
with a few cloudy blackish transverse lines; outer edge of 
median band outlined in ochreous, with two rounded projections 
near middle, these being clouded with very bright reddish-brown; 
terminal and subterminal areas deep reddish-brown, paler 
towards median band; a cloudy blackish subterminal band; 
veins on terminal third obscurely marked in dusky-brown; a 
very conspicuous ochreous apical patch. The hind-wings are 
ochreous, clouded with pale reddish-brown towards termen, with 
a series of brownish subterminal spots. 
The perfect insect appears in December. 
Described and figured from the unique specimen in 
the Canterbury Museum, kindly lent to me by Professor 
Speight. 
HYDRIOMENA CANESCENS. 
(Hydriomena canescens, Philp., Trans. N.Z. Inst., 1., 125.) 
(Plate XII., fig. 41 4.) 
This rather dull ‘‘peppered-looking’’ insect was dis- 
covered, by the late Mr. M. O. Pasco, at Queenstown, Lake 
Wakatipu. 
The expansion of the wings is 14 inches. The fore-wings 
are greyish-white heavily sprinkled with dark grey scales espec- 
ially on the basal patch, median band and terminal area; the 
first line runs abruptly outwards on the costa, thence obliquely 
inwards; the second line is very wavy and strongly curved 
inwards below the middle; the sub-basal and subterminal areas 
have several obscure ochreous marks; the veins are dotted with 
black and dull white. The hind-wings are greyish-white peppered 
with darker grey and with numerous very obscure dull grey 
and dusky-ochreous transverse lines, all of which are stronger 
on the dorsum, 
GHOMETRIDAE. 101 
This species somewhat resembles Hydriomena hemi- 
zona, but lacks the bronzy look of that species. It is also 
considerably smaller and has much more distinct markings 
on the hind-wings. 
The perfect insect appears in March. 
Deseribed and figured from the unique specimen 
kindly lent to me by Mr. Philpott. 
HYDRIOMENA DELTOIDATA. 
(Coremia deltoidata, Walk. Cat. xxv., 1321. Cidaria inclarata, 
Walk. Cat. xxv., 1411. Cidaria perductata, ib., 1412. 
Cidaria congressata, ib., 1412. Cidaria conversata, ib., 1413. 
Cidaria descriptata, ib., 1414. Cidaria bisignata, ib., 1415. 
Cidaria aggregata, ib., 1415. Cidaria congregata, ib., 1415. 
Cidaria plagifuscata, ib., 1416. Coremia pastinaria, Gn., E. 
M. M. v. 64. Cidaria inopiata, Feld. Reis Nov. pl. exxxii. 
3. Cidaria monoliata, Feld. ib., 8. Cidaria perversata, 
Feld. ib., 14, 24. Scotosia deltoidata, Meyr., Trans. N.Z. 
Inst.. xvi., 70. Cephalissa deltoidata, Meyr., Trans. N.Z. 
Inst. xviii., 184.) 
(Plate XII., figs. 24 to 28, varieties; Frontispiece fig. 12 egg; 
Plate II., fig. 40 larva.) 
This pretty insect is extremely abundant throughout 
the country. It also occurs on Stewart Island and on the 
Chatham Islands. 
The expansion of the wings varies from 14 to 14 inches. 
The fore-wings vary from brownish-black to dull orange-brown; 
there is a small darker area near the base, followed by two 
whitish wavy transverse lines, then a broad darker central 
band, often containing within it a narrower band, bounded by 
two wavy black transverse lines; beyond the central band there 
are nearly always two or three pale brown or whitish lines, an 
interrupted subterminal line, and a short oblique whitish line 
below the apex; there is a black discal dot and a white dot on 
the termen near the middle. The hind-wings are yellowish- 
brown, with several wavy, transverse lines near the dorsum; 
there is a series of fine crescentic black lines on the termen 
of both fore- and hind-wings. 
This species is extremely variable, especially in the 
depth of the ground colour both in the fore- and hind- 
wings. One very striking variety occasionally met with has 
the central band of the fore-wing completely divided in 
the middle, which thus forms two dark patches, one on 
the costa, and one on the dorsum. (See Plate XII., figs. 
24 and 26.) <A further development of this variety has 
only the costal.patch present, the whole of the lower por- 
tions of the band being completely obsolete. The minor 
varieties are too numerous to specify. Generally speaking 
specimens from the northern portions of the North Island 
are larger and more vividly marked than those taken else- 
where. 
The eges, which are deposited loose on the leaves of 
Plantago in the early autumn are very small, about one- 
sixtieth on an inch in length, elliptical-globose, whitish, 
covered with large, shallow hexagonal depressions. 
The young larva, when about ten days old, is elongate- 
eylindrical with the anterior segments considerably swollen 
and the ventral and anal prolegs extremely close together ; 

