I ; i; t 



Alatika, several speeiaieiLs taken on marshes, near Saint Micliael's, Sep- 

 leinber 20, I8G7, clinging to blades of grass (Dali, Miis. Peab. Acad. Sc); 

 White Mountains, N. II., November (Packard, Mns. Peab. Acad. Sc); Fort 

 Randall, Dakola Territory (Dr. E. Cone.s); London, Canada (Saunders); 

 Portland, Me. (Morse); Norway, Me. (S. I. Smith, ]\Ius. Comp. Zool.); 

 Andover, Mass., November (Sanlioiii, Mn.s. 13. S. N. 11.); Natick, Mass. 

 (Stratton, Mus. B. S. N. II.); Brooklyn, L. I., N. Y. (Gracf). 



This species is not so connnon with us as in Europe, where it rivals 

 Anhopteryx in its abundance and injurious edects. The oidy difli'erenee I 

 can detect l)etween this and O. bruniafa (Linn.) is in the form ot^ the discal 

 space of the hind wings; in the latter, the outer end is l)r()a(ler and more 

 rounded than in most of my examples of O. boirata. the distance between the 

 origins of" the second and third median venules being less in hniiiiuta than 

 in horeata. Judging by the males of the two species lal)eled by Professor 

 Zeller, I do not see on what grounds Jwrctita should be; separated from brumata. 



The males differ but litll(» except in size and in slight variations of 

 venation. The most striking variation is atlbrded by a large male from Nor- 

 way, Me.,, w^liich is of a sea-green tint. The moth is lial)le to Ix; confounded 

 with Anisopteryx vernata., from which it may be readily recognized by the 

 more rounded fore wings, its ochreous tint, the many waved lines, and, lastly, 

 by the entirely different plan of venation. 



Lama. — Newman thus describes the larva of (9. brumata,: — Head scarcely 

 as wide as the body, and scarcely notched on the crowMi; the; body is rather 

 obese, decreasing in size toward each extremity. Head pale green, semi- 

 transparent. Body glaucous-green, with a nairow, njcdian, blackish stripe on 

 the back, and three narrow white stripes, at equal intervals, on each side. 

 The caterpillar of O. boreata is very similar to that of the winter-moth, but 

 inore transparent, and the stripes more indistinct, but it chiefly differs from 

 that very common species in having a brown head, that of the winter-moth 

 (O. brumatci) being pale green and semi-transparent. It feeds on birch. 



Subfamily FIDONIN^ Gucuee (emend.). 



Kauiily Mncarhlir Guen., Plial., ii, (il, 18.")7. 

 l-"amily Fidonida Guen., Phal., ii, 95, 1H57. 

 Family Zeremdce Gneu., Plial., ii, 19.">, 1857. 



This subfamily may be distinguished by the usually s(puire front, the 

 usually rather slender paljii. which are as a rule latlier long, always passing 



