144 
Psyche 
[June- August 
its allies, all the genital structures being unique, including the 
vesica. The variations of the genitalia which occurred within 
each form were found to be independent of variations in macula- 
tion, nor did they bear any relation to locality. 
No one factor, structural or otherwise, can determine a 
species, and more knowledge of the early stages, bred thru more 
than one generation, is essential to a thoro knowledge of any 
form. As our knowledge stands at present, however, I believe 
the evidence indicates that all of the forms are species. We have 
four forms readily separable on superficial characters and with 
corresponding structural differences, no one of which is known to 
have been bred from the other. It seems more logical to regard 
such forms as distinct until proved otherwise, than to lump three 
of them under one species as at present. 
Bibliography 
The following bibliography includes only those titles subsequent to 
1890. References prior to that date will be found in J. B. Smith’s “Prelim- 
inary Catalog of the Arctiidse” (Can. Ent. 1889, XXI, p. 169) 
Barnes & McDunnough, 1912, Can. Ent. xliv, 189. 
1917, Check-List. 
Beutenmuller, W. 1898, Bui. Am. Mus. Nat. Hist, x, 381. 
Cassino, S. E. 1918, Lepidopterist, ii, 2. 
Dyar, H. G. 1893, Psyche, vi, 479. 
1900, Jour. N. Y. Ent. Soc. viii, 37. 
1902, Cat. N. A. Lep. 
(Engel), 1903, Ent. News, vix, 307. 
Gibson, A. 1900, Can. Ent. xxxii, 369. 
1902, Can. Ent. xxxiv, 50. 
1903, Can. Ent. xxxv, 153. 
1905, Can. Ent. xxxvii, 347. 
Hampson, G. F. 1901 Cap. Lep. Phal. Brit. Mus. iii, 410. 
Cat. Lep. Phal., Supplement ii. 
Holland, W. J. 1904, Moth Book, 132. 
Marchand, W. 1917, Psyche, xxiv, 59. 
Neumoegan & Dyar, 1893, Ent. News, iv, 213. 
1894, Jour. N. Y. Ent. Soc. ii, l4. 
Seifert, O. 1902, Jour. N. Y. Ent. Soc. x, 4; 88. 
Seitz, A. 1919, Macrolepidoptera, vi, 305. 
Smith, J. B. 1892, Can. Ent. xxiv, 133. 
1909, Rept. Ins. N. J., 441. 
(Smith, J. B.) 1897, Ent. News, viii, 114. 
Stretch, R. 1906, Jour. N. Y. Ent. Soc. xiv, 120. 
