266 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii4 



broader and less tapering, and the antrum somewhat broader and 

 longer. The difference between disputabilis and maximana is more 

 remarkable: The gnathos of the new species has no spiculation, the 

 socii are longer and of a distinctly other shape, the valva is more 

 downcurved, the external excavation of sacculus is narrower, and the 

 apical cornutus of the vesica has a flat base. The lateral lobes of 

 sterigma of disputabilis are more rotundate apicad, and they usually 

 are more bent than in maximana. 



The variation of external characters of disputabilis is very large, 

 but the present knowledge of it is inadequate for separation of geo- 

 graphic forms. The range of this western Nearctic species is probably 

 limited by the Rocky Mountains, although in Canada disputabilis is 

 known from one female specimen from east of this line, in Ontario. 



Acleris maximana (Barnes and Busck), new combination 



FiGUKE 7,c; Plates 8 (figs. 25-28), 15-18 (figs. 48-6o) 



Peronea maxhnana Barnes and Busck, 1920, Contr. Nat. Hist. Lep. North America, 



vol. 4, p. 216, pi. 32, fig. 1.— Blackmore, 1921, British Columbia Prov. Mus. 



Rept. for 1920, pp. 24 and 28, pi. 2. — McDunnough, 1934, Canadian Journ. 



Res., vol. 11, pp. 295, 325 (fig. 4), 329 (fig. 6); 1939, Mem. Southern California 



Acad. Sci., vol. 2, p. 58, no. 7476. 

 Peronea maxima [sic]. — Heriot, 1935, Proc. Ent. Soc. British Columbia, vol. 31 



(for 1934), p. 32. 



McDunnough (1934) gave a quite accurate redescription of average 

 specimens of maximana, but it does not completely cover the variation 

 of this species. The ground color of the forewings varies from whitish 

 gray and bluish gray to smoky gray or brownish gray. Some specimens 

 have the forewings with markings rather complete, but in others these 

 markings are obliterate or lacking; in some, dark gray spots are 

 present. The spots, situated before the last third of the forewing, 

 sometimes form a kind of interrupted transverse fascia. A dark spot 

 on discocellulars in often developed. In some specimens the forewings 

 are dark sprinlded or reticulated, in others they are strigate because 

 of dark lines on veins. Along the discal cell of the forewings a 

 yellowish ray is sometimes present which reaches almost to the termen 

 below apex. Hind wings are whitish, more or less smoky, often with 

 fine dark reticulation. The above variation obscm*es any constant 

 characters distinguishing maximana from nigrolinea Robinson and 

 disputabilis, new species. As discussed above under disputabilis, the 

 genitalia give, in spite of their variation, a basis for separating these 

 three species. In the male genitalia, this variation is seen in the shape 

 of the valvae. The angle of the sacculus before half is either produced 

 into a rather acute or blunt point, or it is simply rounded. The 

 number of cornuti in the group varies from five to eight. 



