342 JOHN B. SMITH. 



narrow, elongate and sometimes fused with the reniform ; the s. t. 

 line is pale, interrupted and irregular, preceded by sagittate black 

 dashes, which are placed in a pale halo. The species are thus dis- 

 tinguished from clbalis and gvaeillima in which there is a decided 

 and continuous dark shade preceding the s. t. line. 



Of the species placed here chandleri, the type of the group, is 

 darkest, the markings most contrasted ; the ordinary spots are fused, 

 and the secondaries have the black margin distinct. 



Biparia, long considered a variety of chandleri, is readily distin- 

 guished by the luteous shading and the distinctly separated ordinary 

 spots; the secondaries have the outer margin indefined, smoky. The 

 underside in chandleri has the wings with definite dusky outer mar- 

 gins, while in riparia and major the disc is smoky, and outwardly 

 the wing paler. 



Major, which is really much closer to riparia than is chandleri, 

 differs from both by the very even, powdery gray of primaries ; the 

 markings are very illy defined and the ordinary spots nearly con- 

 colorous and not fused. The secondaries are inclined to be smoky 

 throughout and the outer dusky margin is not defined. 



Aqualia Gi'ote is unknown to me. Mr. Grote says it resembles 

 chandleri, but the interspaceal black dashes are not interrupted by a 

 s. t. line, which is said to be wanting. It is therefore essentially dif- 

 ferent from all the preceding species in which this line is well marked. 



In synoptic from the species are separable as follows : 



Subtermiiial line distinct. 



Ordinary spots fused, primaries dark cliaiidleri. 



Ordinary spots distinctly separated. 

 Primaries luteous gray, the ordinary spots very distinctly pale ringed. 



riparia. 



Primaries even, dark ash-gray, the ordinary spots not well defined. .major. 



Subterminal line wanting aqnalis. 



Belonging here, but not readily placeable in the series without 

 autoptic acquaintance, is oblita Grt., which I have not seen. The 

 s. t. line and spots are as in chandleri, the claviform very long. It 

 is not distinctly stated whether or not the ordinary spots are in some 

 way joined, but the reniform has an inferior spur making it L shaped. 



O. chandleri Grt., Bull. BuflF. Soc. N. Sci. 1873, i, 107, pi. 3, fig. 9 ; id., 1875, 



iii, 87; Bull. Geog. and Geol. Surv. iii, 117. 



Head, thorax and primaries rather dark fnscous gray, the markings distinct, 



white and black. Ordinary lines marked only on costa, the t. p. line sometimes 



traceable for its full length across the wing, then very fine, lunulate, widely 



