X.—THE GEOMETRIDAE. 113 
area; these lines run together on the costa where they form 
three or four broad blackish bars of variable length and 
intensity. The hind-wings have two or three extremely faint 
transverse lines: All the cilia are pale greyish-white barred with 
blackish-grey. 
There is a very beautiful form, found in forests in 
both islands, at elevations between 2,500 and 4,000 feet 
above the sea-level, in which the ground colour is almost 
white and the transverse lines nearly absent, except on the 
costal area, where there are three very conspicuous black- 
ish-brown bars, the outermost extending half way across 
the wing (fig. 42). If this form is regarded as a distinct 
species the name XYanthorhoe eupitheciaria should be given 
tonite 
The perfect insect appears from October till March. 
It rests on stones, or bare ground, and is very partial to 
the sides of road cuttings where it sometimes occurs in 
considerable numbers. It is also fond of resting on walls 
and fences. 
XANTHORHOE PLUMBEA. 
(Xanthorhoe plumbed, Philp., Trans. N.Z. Inst. xlvii., 194.) 
This very obscure species has occurred at Queenstown, 
Lake Wakatipu. It is evidently very closely allied both 
to X. cinerearia and X. semisignata and is apparently 
somewhat intermediate between them. 
The expansion of the wings is about % inch. It seems 
to be only characterized by the bluish ground colour, red- 
dish-ochreous tinge on veins posterior to second line, and 
longer antennal pectinations( ?) 
The perfect insect appears in November. 
XANTHORHOE FARINATA. 
(Larentia farinata, Warr., Nov. Zool. iii., 388; Prout, Proc. N.Z. 
Inst. xliv., 52.) 
This very obscure form has occurred in the Botanical 
Gardens at Wellington. 
The expansion of the wings of the male is % inch; of 
the female almost 1 inch. 
It is described as ‘‘of a more unicolorous slaty-grey 
(not brownish-grey) than Yanthorhoe cinerearia, and is 
larger and more weakly marked. About 21 segments of 
the antennae are pectinated.’’ 
XANTHORHOE SEMISIGNATA. 
(Larentia semisignata, Walk., Cat. xxiv., 1200; Prout, Proc. N.Z. 
Inst. xliv., 52; Larentia punctilineata, Walk., Cat. xxiv., 
1202; Butl., Cat. N.Z. Lep. pl. iii., 12; Cidaria dissociata, 
Walk., Cat. xxvi., 1734; Cidaria similisata, ib., 1735; 
Larentia corcularia, Guen., Ent. Mo. Mag. v., 61; Xanthor- 
hoe cinerearia, Huds., N.Z. Moths, pl. viii., 2a.) 
(Plate XIII., fig. 37 4; Frontispiece fig. 14 egg.) 
This rather dull-looking insect is very common and 
generally distributed throughout the country, and is also 
found on Stewart Island. 

*Trans. N.Z. Inst. li., 350. 
The expansion of the wings is from 1 to 14 inches. All the 
wings are rather pale dull grey, sometimes very slightly tinged 
with brown. The fore-wings have numerous fine wavy darker 
grey transverse lines, strongest on the margins of the basal 
patch, median band and subterminal area; there is usually an 
elongate black discal dot, and the veins are more or less dotted 
with black and dull white. The cilia of all the wings are pale 
grey, barred with darker grey. 
This species varies slightly in depth of colour and 
intensity of markings. 
The perfect insect appears from October till March. 
It is usually found in dry stony places where its grey 
colouring is highly protective. It is often very abundant 
in river beds. 
: XANTHORHOE CLANDESTINA. 
(Xanthorhoe clandestina, Philp., Trans. N.Z. Inst. liii., 338.) 
(Plate XII, fig. 38 @.) 
This very distinct species was discovered by Mr. Gour- 
lay at Arthur’s Pass. 
The expansion of the wings is 12 inches. The fore-wings, 
which have the costa strongly bent at the apex and the termen 
oblique, are rather deep slaty-grey with indistinct darker mark- 
ings; there is a small basal patch consisting of about three wavy 
transverse lines; a narrow sub-basal band of about two lines; 
a broad median band margined by two or three wavy transverse 
lines enclosing a pale central area with blackish discal dot; an 
obscure subterminal band. The hind-wings are pale grey darker 
towards the termen. The underside of all the wings is pale 
grey with very faint costal and subterminal markings. 
The perfect insect appears in February. 
Described and figured from a specimen kindly lent 
to me by Mr. Philpott. 
XANTHORHOE PERIPHABA, 
(Xanthorhoe periphaea, Meyr., Trans. Ent. Soc. Lond., 1905, 220.) 
(Eiatem xiii eieas6 ce) 
This very obscurely-marked species has occurred at 
Macetown, Ben Lomond and on the Humboldt Range, at 
the head of Lake Wakatipu, at an altitude of about 4,000 
feet above the sea-level. 
The expansion of the wings is 14 inches. The fore-wings, 
which have the apex slightly acute, are very dull greyish- 
ochreous; the costa is marked with dull reddish-brown and the 
basal patch, median band and terminal areas are sparsely 
speckled with blackish-grey and white scales. The hind-wings are 
dull greyish-ochreous. 
Distinguished from its allies by its extremely obscure 
markings and generally dull colouring. 
The perfect insect appears in February and March, 
and frequents open country on the mountain sides. 
XANTHORHOE FALCATA. 
(Larentia falcata, Butl., Cist. Ent. ii. 501; Meyr., Trans. N.Z. 
Inst, xx.; 58.) 
A single specimen of this species is in the British 
Museum collection of New Zealand Lepidoptera. Of this 
specimen Mr. Meyrick remarks as follows :— 

