24 Transactions. — Zoology. 



This species and C. callirrhoiis differ somewhat in form of wing from 

 those most nearly allied to them, the forewings being somewhat less dilated 

 and the hindmargin less perceptibly sinuate and more strongly rounded. 

 C. haplutomus differs from all its nearest allies in the absence of the broad 

 white thoracic stripe (only in the much paler 0. simplex is this occasionally 

 obsolete), and in the presence of a complete hindmarginal row of minute 

 black dots. 



Several specimens taken by Mr. E. W. Fereday near Lake Wakatipu in 

 January. 



7. Cr. callirrhoiis, n. sp. 



Male. — 24-27 mm. Head white, with a pale brownish longitudinal 

 spot on face, and posterior margin of eyes ochreous-brown. Maxillary 

 palpi white, towards base externally ochreous-brown. Labial palpi long, 

 white, externally ochreous-brown. Antennae dark fuscous. Thorax brown- 

 ish-ochreous, a broad central longitudinal stripe and margins of shoulders 

 white. Abdomen ochreous-whitish, more ochreous towards base. Anterior 

 and middle legs greyish-fuscous, posterior legs white. Forewings moderate 

 or rather narrow, costa at first very gently arched, more strongly on pos- 

 terior half, distinctly sinuate in middle, apex nearly rectangular, hind 

 margin moderately oblique, slightly sinuate below apex, strongly rounded 

 beneath ; greyish-ochreous, rather deeper on disc, with a more or less 

 distinct brassy-yellowish tinge ; a slender white streak along costa through- 

 out ; veins on posterior two-thirds of wing above median streak indicated 

 by slender white lines, partially suffused and confluent on costa about f ; 

 a slender almost straight central longitudinal white streak from base to 

 hindmargin, shghtly sinuate in middle ; sometimes a slender white streak 

 along vein 2 towards hindmargin ; a narrow white streak, very slender at 

 extremities, along inner margin from base, leaving inner margin at about % 

 and continued very near it to anal angle, posteriorly suffused : cilia shining 

 whitish. Hindwings whitish-grey, somewhat darker posteriorly, hindmar- 

 gin slightly ochreous-tinged ; cilia white. 



Distinguished from all its allies by the distinctness of the slender white 

 streaks on the veins ; from C. haplotomus, which it most nearly resembles, 

 also by the smaller size, and broad white stripe on thorax. 



I have met with this elegant species only on sandhills near Christchurch; 

 in February and March ; Mr. E. W. Fereday has taken it, with other 

 species usually frequenting coast sandhills, at Lake Guyon. 



8. Cr. simplex, Butl. 

 (Chilo simplex, Butl., Proc. Zool. Soc. Lond., 1877, 400, PI. XLIIL, 12.) 



Male, female. — 27-32 mm. Head pale ochreous, anterior margin of eyes 

 and a spot on crown more or less whitish. Maxillary palpi white, towards 



