Meyrick. — On New Zealand Micro-Lepicloptera. 127 



The sexes would readily be taken for distinct species. 



Arthur's Pass, from 1,500 to 4,000 feet, but principally at the lower 

 levels ; common in January. 



9. Mimas, lithoxestus, n. sp. 



Male, female.— 23-28 mm. Head, palpi, thorax, and abdomen whitish- 

 ochreous, mixed with white. Antennae fuscous. Legs ochreous-whitish, 

 internally dark fuscous. Forewings light fuscous, suffused with whitish- 

 ochreous posteriorly and towards inner margin, and strewn with white in 

 disc ; a sharply-defined very narrow blackish-fuscous costal streak from 

 base to apex, rather strongly dilated between ^ and f , obscurely margined 

 beneath with pale whitish-ochreous ; a black dot in disc before and rather 

 below cleft ; apex and hindmargin rather darker fuscous, somewhat mixed 

 with whitish ; a fine black line along lower edge of first segment : cilia 

 whitish-ochreous, on costa dark fuscous, within cleft and on hindmargin of 

 first segment snow-white. Hindwings fuscous-grey ; cilia pale greyish- 

 ochreous. 



Nearly allied to M. charadrias, but easily separated by the larger size, 

 much neater appearance, sharply defined costal streak, black line on 

 lower margin of first segment, and absence of distinct dark line in 

 cilia. 



Arthur's Pass, from 3,000 to 4,000 feet, common amongst rough herbage 

 in January. 



5. Platyptilia, Hb. 



Forehead with a cone of scales. Antennae shortly ciliated. Palpi 

 rather long, porrected, second joint loosely scaled above, terminal joint 

 exposed. Posterior tibiae with apex sometimes somewhat thickened, all 

 spurs nearly equal, moderate. Forewings cleft to J, segments moderately 

 broad, hindmargin of first segment concave, of second convex ; with 

 10 veins (4, 6) ; 2 from near angle of cell, 3 and 4 from a point, 6 and 7 

 stalked, 6 to costa, 10 free. Hindwings with segments moderate, upper 

 two considerably dilated, obliquely truncate ; witb 6 veins (1, 3, 2) ; 2 from 

 near middle of lower margin of cell, 3 and 4 from a point, G apparently 

 shortly anastomosing with 5 in middle ; cilia of lower margin with more or 

 less of black scales. 



A genus of probably universal distribution, well represented in Europe 

 and North America ; in Australia only by a single species, nearly allied to 

 P. falcatalis. The larvae appear to be usually attached to Compositce. 



la. Forewings with a dark costal triangle beyond middle. 



2a. Dorsal margin of hindwings fringed with black scales on basal half 11. falcatalis. 



2b. ,, ,, ,, without black scales, except in middla 10. liaasti. 



lb. Forewings without costal triangle .. ., ,, .. ..12. heHastix, 



