170 Transactions, — Zoology. 



hindmargiu moderately sinuate ; pale whitish ■ grey > °ih'a 

 ochreous-whitish. 



Distinguished by the pale colour and blackish median streak, 

 which, though sometimes imperfect, is always traceaF e > it 

 recalls the considerably darker European G. mulinella. 



Wellington, Hamilton, and Invercargill ; common in dry 

 grassy places in December and January. 



13. Gel. lithodes, n. sp. 



Male. — 16 mm. Head, palpi, antennae, thorax, abdomen, 

 and legs grey, finely sprinkled with whitish; antennae rather 

 densely pubescent. Forewings elongate, narrow, tolerably 

 acutely pointed ; grey, finely irrorated with blue- whitish ; three 

 discal spots obscurely darker, first before middle, second on 

 fold rather before first, third in disc beyond middle : cilia 

 whitish-grey. Hindwings with apex round-pointed, hindmargin 

 slightly sinuate ; whitish-grey ; cilia grey-whitish. 



The slaty-grey colouring is imitative of the mountain rock, 

 as in Scoparia cataxesta and other species ; the antennal 

 pubescence is also a common characteristic of alpine forms. 



Arthur's Pass (2,500 feet), in January ; one specimen resting 

 on shingle. 



14. Gel. achy rota, n. sp. 



Male, female. — 17-18 mm. Head, thorax, and abdomen pale 

 greyish-ochreous mixed with whitish. Palpi whitish-ochreous, 

 basal f of second joint, and basal and supramedian bands of 

 terminal joint dark fuscous. Antennae light greyish-ochreous. 

 Legs dark fuscous, posterior tibiae above and apex of joints 

 ochreous-whitish. Forewings elongate, apex round-pointed, 

 hindmargin very obliquely rounded ; light brownish-ochreous, 

 irregularly mixed with whitish and blackish scales ; anterior half 

 of costa suffused with whitish, and dotted with blackish ; inner 

 margin between ^ and § suffused with blackish ; a small black 

 spot on base of costa ; four small black discal spots, surrounded 

 with whitish rings, first in disc before middle, second on fold 

 rather before first, their rings confluent, third and fourth 

 dot-like, transversely placed and close together in disc at § ; 

 a cloudy whitish fascia from ^ of costa to anal angle, dentate 

 outwards in middle ; a cloudy black hindmarginal line : cilia 

 ochreous-whitish with two dark grey lines, first interrupted, 

 second entire. Hindwings with apex rounded, hindmargin 

 hardly sinuate; grey, towards base paler; cilia ochreous-whitish, 

 with two cloudy grey lines. 



Kemote from the other New Zealand species of the genus, 

 and approaching Tachyptilia populella in form and superficial 

 appearance. 



Christchurch and Dunedin ; rather common amongst bush, 

 in December and January. 



