of the White Mountains. 625 



each half of anal segment conical, not very bluntly pointed. 

 Length .94 in. ; greatest breadth .22 in.; breadth of head. 1 in. 



Pupa uniform reddish brown, compact, well rounded ; 

 the dorsal curve of the abdomen full and regular, that of 

 the thorax rather high, slightly depressed above ; the dor- 

 sal elevation of the thorax laterally compressed, terminat- 

 ing in a furrow which is in continuation of the hind edge 

 of wings ; the shoulders at base of wings are rather prom- 

 inent, the head obtuse and regularly rounded ; abdomen 

 cylindrical, tapering very regularly and rather rapidly to 

 the apex, which is blunt, and has an oval depression on 

 the under surface, with broad heavy border; the ventral 

 surface is somewhat flattened ; dorsum of thorax with 

 very slight transverse wrinkles, and a few oblique heavier 

 ones ; abdomen smooth. Length .diS in. ; breadth across 

 abdomen .24 in.; breadth at base of wings .21 in. 



This butterfly begins to appear by the first of July, and 

 perhaps earlier, and continues until about the 10th of Au- 

 gust ; they are laying their eggs at least until the 22d of 

 July, and probably a little later ; caterpillars were taken 

 nearly, if not quite, full grown on August 2J, and others 

 fully grown on August 19tli ; only one was taken alive, 

 upon a rock, apparently feeding upon lichen ;* an attempt 

 to raise it in the valley below proved unsuccessful, although 

 it lived for a long period. The other specimens were ob- 

 tained drowned in pools of water, a very satisfactory mode 

 of collecting upon Mount Washington ; the description of 

 the colors was taken from the living insect. Of the pupa 

 I have only obtained fragments and injured specimens 

 under rocks, where they can doubtless be found in some 

 abundance when searched for at the proper time. The 

 most favorable localities for collecting the butterfly that I 



* Since this was written, in company with Mr. Horace Mann, I liave again 

 taken specimens of the living caterpillar, feeding upon the same lichen, which 

 has been determined by Mr. Mann to be Peltigera canina Hoflfm. 



JOURNAL B. S. N. H. 79 



