828 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvii. 



shades edging a broken white dorsal line; a narrow trans^ crse Ijar on 

 joint 12. Sides dark, enveloping the pale subdorsal line; subventral 

 region light brown like the dorsum, the edges of the substigmatal 

 band showing ^^ellowish, the tilling rather reddish brown. Thoracic 

 feet brown Ijlackish; tubercles and spiracles black, not conspicuous. 

 The dorsal line shows white anteriorly. 

 Stage VI. — (Not observed.) 



NOCTUA C-NIGRUM Linnaeus. 



Thirtv-four specimens, July 21, August 1, 3, 5, 7, 11, 16, 17, 18. 

 We did not attempt to breed this well-known species. 



NOCTUA FENNICA Tauscher. 



One specimen, August 7. 



NOCTUA PLECTA Linnaeus. 



One specimen, June 2o. 



NOCTUA UNICOLOR Walker. 



Two specimens, June o<), Jvdy s. 



NOCTUA SIERR/E Harvey. 



Three hundred and eighty-nine specimens, June 23, 25, July 8, 14, 

 19, 25, 29 (Bear Lake), 31," August 1, 2, 5, 7, 11, 17. This is prob- 

 ably not more than a local race of Jiarusplca Grote. It is darker and 

 the hind wings are a little more silky grayish. It may not be distinct 

 from inoplnatns Smith, which name it bears in Mr. Cockle's collection. 

 Smith's types came from different faunal regions. The ^'' /'nophiafxs'''' 

 from Corfield, Vancouver, are probably normal .sierra, and I would 

 prefer to reserve the name ino])matus for the smaller form inhal>iting 

 the high prairies, typified by the AVinnipeg, Manitoba, specimens. 

 Eggs were o))tained from captive females, but the larvie hil)ernated, 

 and only the most active ones were forced to stage v in September, so 

 that the last stage remains to be described. 



Egg- — Three-fourths spherical, rather high, the sides straightened, 

 base flattened narrowly, vertex smooth. About 85 ribs, diminishing 

 to 11 at the vertex, low, broad, but with linear crests and line distinct 

 cross-stria?, formingrectangularcells Avider than high. Vertical retic- 

 ulations elongate radially. Pale greenish white, no change before 

 hatching; diameter, 0.9 nun. 



Stage I. — Head rounded bilobed, blackish brown. Bod}' moderate, 

 normal, joint 12 enlarged, feet of joints 7 and 8^ small. Whitish col- 

 orless, tubercles large, smoky black, cervical shield and bases of the 

 feet similar, the tips clear; no leg plates. Seta3 long, brown, pointed; 

 skin sparsely dark granular. 



