458 NORTH AMERICAN NOCTlTiDJfi SMITH. 



prove races of the one. The male of one is unknown to us, and an ex- 

 amination of the genitalia is required to make certain. Both species 

 are closely related to the European brassicae, but are distinct in geni- 

 tal structure, though, liiacnlation alone considered, they would be cor- 

 rectly classed as varieties of one species. The male specimens of bras- 

 sicae have on the under side of the abdomen, near the base, two long, 

 thin, brushes of yellow hair, which are wanting in the American forms. 

 Occidenta Grt. comes from New Mexico; curialis Smith from Maine, 

 strikingly illustrating the remarkable character of the fauna of the 

 latter State. 



Occidenta has the ordinary spots well marked, whitish, the s. t. line 

 preceded by a white shade; there is a greenish patch near base. The 

 male I have not seen. 



Curialis has the ordinary spots less defined ; the reniform white 

 marked; orbicular coucolorous, almost obsolete. The green patch is 

 wanting. The male only is known. 



Brassicae of Europe differs from both the American forms by the 

 paler ground, and the more evident transverse maculation. The geni- 

 talia and the yellow tuftings of the male, however, furnish the important 

 characters. 



Barathra occidenta Gut. 



Ann. and Mag. N. H. [London], 1883, 54. Trans. Kans. Ac. VIII, 55, Coplmamestra. 

 Sordid fuscous brown, with black, scaly irrorat ion. Transverse lines 

 indistiuct, but traceable; geminate. Basal line distinct, geminate, 

 black ; the included space pale. T. a. line upright, scarcely irregular. 

 In the inferior portion of sub-basal space is a mossy-green patch. T. p. 

 line outwardly bent over reniform, strongly incurved below. S. t. line 

 white, irregular . with strongly marked W on veins 3 and 4, preceded 

 by a broad greenish shade which extends to and includes the apex. 

 S. t. space else coucolorous. Terminal space narrow, powdery. A 

 row of black terminal lunules. Claviform, narrow, rather short, 

 Orbicular, moderate in size, with pale filling. Reniform, rather large ; 

 white. Head and thorax coucolorous with primaries. Secondaries at 

 base pearly whitish, outwardly blackish. Beneath pale, powdery, with 

 incomplete common line and faint discal spot. Expands 1.60 inches 

 (40"""). 



Habitat. — New Mexico. 



The species has at first sight a casual resemblance to M. adjuncta, 

 from which, however, it is readily distinguished by the generic char- 

 acters. 



Barathra curialis Smith. 



Proc. U. S. Nat. Mus., 1887, x, 470, Copimamcsira. 

 Blackish fuscous, with a reddish tinge through basal and s. t. space, 

 slightly marked also through centre of median space. Basal line gem- 

 inate, indistinct, interrupted. T. a. line upright, hardly traceable. 



