266 Transactions. — Zoolor/ij. 



a small longitudinal streak of silver between the latter streaks and the base 

 of the wing ; the transverse row of spots consists of a conical spot — between 

 the externo-medial and subexterno-medial nervures, with its apex pointing 

 to the hind-margin ; a sagittate spot between the subexterno-medial and 

 interno -medial nervures ; and a similar one between the externo-medial 

 and subexterno-medial nervures, all bordered internally with a dusky 

 shade; the latter two spots pointing towards the base of the wing, and 

 each followed towards the hind-margin by a small silvery dot, between 

 which and the hind-margin is a small silvery point, edged externally 

 with black ; a small pale, irregular subcostal mark near the base of the 

 wing ; and on the costa, two-thirds from the base of the wing, a larger pale 

 triangular mark, followed by two pale irregular spots. 



Male and female alike, except in size. 



Expanse of Wings: male, 18^ lines; female, 20 lines. 



Habitat: Whitcombe's Pass, Canterbury, New Zealand. 



I have described this butterfly from three dilapidated specimens brought 

 to me by J. D. Enys, Esq., who has favoured me with the following account of 

 their capture: — ^" I caught the three butterflies on Whitcombe's Pass, up 

 the Eakaia, on the 8th of March, 1879. The Pass is over 4000 feet, and 

 the first of the butterflies was caught close to the top ; the others were near 

 it. They were knocked down by my hat and put in paper, which must be 

 my excuse for their state. They seemed to be rather slow in their flight, 

 and were chiefly found on the snow-grass (of the family Danthonia) which 

 covers the slopes of the hills at that height. I saw a number, but only 

 got four." 



In the accompanying coloured drawing (Plate IX.), figure 4 represents 

 the male ; a, the under-side ; b, the upper-side. 



I have named the butterfly after Mr. A. G. Butler, who has recently 

 contributed valuable lists of, and papers on, the Leiyidoi^tera of New Zealand, 

 and to whom I am much indebted. 



[Since writing the above. Dr. Julius Von Haast informs me that it was 

 a specimen of this butterfly which he took in 1866 on Whitcombe's Pass, 

 not of P. pluio, as he before stated {vide " Trans. N.Z. Inst.," Vol. IV., 

 p. 217). Dr. Von Haast speaks from recollection, not having preserved the 

 specimen he took.] 



