86 Transactions. — Zoology. 



varying in strength and intensity ; cilia barred with blackish and whitish. 

 Hindwings moderate, hindrnargin rounded ; dark fuscous ; a blackish discal 

 dot ; a cloudy whitish irroration forming a double curved fascia beyond 

 middle, and a dentate subterminal line ; cilia as in forewings. 



Imitative in colour of the dark lichen-grown* rocks. 



I took three specimens almost on the summit of Ben Lomond, Lake 

 Wakatipu, at 5,600 feet, in January. 



53. Pas. mechanitis, n.sp. 



Male, female. — 19-23 mm. Forewings moderate, hindrnargin rounded ; 

 dark fuscous, densely irrorated and median band almost wholly suffused 

 with yellow ; a nearly straight yellow or whitish line towards base, anteriorly 

 strongly blackish-margined ; an irregularly curved white line at i, poste- 

 riorly strongly blackish-margined ; a small blackish discal dot ; an irregu- 

 larly angulated slender dark fuscous median line, beyond which is another 

 almost confluent with next line ; a white line beyond middle, anteriorly 

 strongly blackish-margined, strongly angulated in middle, subdentate be- 

 neath ; a slender very sharply dentate irregular yellow subterminal line ; 

 cilia with basal half dark grey, apical half wholly white. Hindwings dark 

 fuscous, base irrorated with yellow ; an irregular obscure yellow fascia 

 before middle; a white sinuate median line, sometimes yellow above; sub- 

 terminal line and cilia as in forewings. 



Constant, except that the white markings tend to be suffused with 

 yellow. 



Arthur's Pass (3,100 to 4,600 feet), and Mount Hutt, common in 

 grassy places on the mountains, from January to March ; fifteen speci- 

 mens. 



54. Pas. paradelplia, n. sp. 



Male. — 21-23 mm. Forewings moderate, costa straight, hindrnargin 

 rounded ; dark fuscous, densely and finely strewn with yellowish and a few 

 whitish scales ; a curved cloudy whitish line towards base, anteriorly 

 blackish-margined ; a slightly bent whitish line at \, posteriorly blackish- 

 margined ; sometimes a small blackish discal dot, and slender curved 

 median line ; a clearly marked white line beyond middle, anteriorly 

 strongly blackish-margined, shortly and obtusely angulated in middle, and 

 inner margin shortly toothed above and below middle ; an irregular sinuate 

 subdentate whitish-yellowish subterminal line : cilia with basal half dark 

 grey, apical half sharply barred with dark fuscous and white. Hindwings 

 somewhat elongate, hindrnargin rounded ; dark fuscous ; basal half irro- 

 rated with pale yellowish ; a very obscure curved whitish shade before 

 middle ; a well-defined strongly-curved white median line ; a very irregular 

 subdentate whitish-yellowish subterminal line ; cilia as in forewings. 



