Page:Transactions NZ Institute Volume 15.djvu/46

whitish, becoming gradually more ochreous towards base; inner marginal edge sometimes very narrowly ochreous-whitish; a straight moderately broad central longitudinal ochreous-white streak from base to hindmargin, attenuated on basal third and before hindmargin, more or less distinctly margined with dark fuscous: cilia pale whitish-ochreous, on basal third light grey, with a distinct ochreous-white spot on central streak. Hindwings dark fuscous; cilia ochreous-white or whitish-ochreous, with a grey basal line.

Easily distinguished from all the other New Zealand species by the nearly uniform dark fuscous hindwings with whitish-ochreous cilia. In form and general characteristics it is closely allied to C. corruptus, but differs widely in the deep ochreous-brown colouring, and the absence of the dark fuscous blotches. These two species are shorter-winged, more stoutly built, and more densely scaled than usual, but the venation is typical.

A mountain species; taken commonly by Mr. R. W. Fereday about Porter's Pass and Mount Hutt in January.

Male.—18–19 mm. Head dark fuscous, face and back of crown ochreous-whitish. Palpi moderate, dark fuscous mixed with greyish-ochreous, beneath whitish towards base. Antennæ dark fuscous. Thorax dark fuscous, sides more ochreous-fuscous, shoulders with a few ochreous-whitish scales. Abdomen dark fuscous, suffused with pale greyish-ochreous posteriorly. Legs whitish-ochreous, anterior and middle pair suffused with greyish-fuscous. Forewing short, moderately broad, costa almost straight, slightly sinuate in middle, apex almost acute, hindmargin very slightly rounded, rather strongly oblique; ochreous-brown; extreme costal edge suffusedly ochreous-whitish, towards base and apex dark fuscous; a slender very ill-defined white streak beneath costa from middle to apex; inner margin rather narrowly suffused with dull ochreous-grey-whitish, towards base very narrowly and margined above by a short dark fuscous streak; a straight rather narrow central longitudinal white streak from base to hindmargin, considerably attenuated towards both ends, lower edge indented beyond middle; a broad dark fuscous streak along each margin of central streak from near base to middle, attenuated anteriorly; a dark fuscous blotch on each margin of central streak about ⅔, extending above to the subcostal white streak, and beneath to the dorsal whitish suffusion; a rather narrow dark fuscous band along hindmargin, interrupted by central streak, dilated towards costa: cilia grey, tips paler, with a rather darker grey basal line, on upper half of hindmargin more or less scaled with ochreous-white. Hindwings fuscous-grey, with a narrow dark fuscous hindmarginal band; cilia grey-whitish, with a grey basal line.