AMERICAN LEPIDOPTERA. 209 



appearing as if there was a thin film of whitish over the insect, 

 which disappears after even a brief flight. The species is quite a 

 well marked one and seems to conflict with none other of the genus. 



Notes on ACOWTIA <►< lis. 



To the courtesy of Dr. William Barnes I owe a series of speci- 

 mens from his collection, including also some that were collected by 

 or for Mr. O. C. Poling. This material has enabled me to decide as 

 to the standing of some forms that had been doubtfully set aside, 

 and it added some forms undoubtedly different from anything that 

 1 had previously had under observation. The increase in the mini 

 ber of species has been quite unexpected, and indications point to 

 a yet greater number. All the separations made have justified 

 themselves, and the range of variation, though considerable in cer- 

 tain directions, seems to move within tolerably well defined lines. 



The exact standing of the species cited by me under elegantula 

 Harv. is yet open to question. Of arizona and seminivealis I have 

 compared the types and their identity is unquestionable. I am not 

 so sure now that elegantula is really the same species. A consider- 

 able series of the arizonae, form is now at hand and shows so much 

 variation that I have been tempted to believe that there was more 

 than one species; but none of this variation runs toward elegantula 

 which is clearly separable, though nearly allied in type of macula- 

 tion. Elegantula comes from Nevada, and I have no material from 

 that region for comparison. Under the circumstances arizona' must 

 be restored to rank as a species. As to semiopaca, Mr. Grote has 

 himself made this a synonym of elegantula. I have no material 

 from the type locality of tins species (Montana), therefore cannot 

 speak as to the correctness of the reference; it is ;i probable one, 

 however, as the faunal region is the same. 



Tornaeontia altera n. sp. — Head, thorax and abdomen white, immacu- 

 late. Primaries white to the middle, save for a gray shading at base ; olivaceous 

 gray or brown outwardly. The basal gray shade extends over the costal region, 

 broken by the white basal line to the t. a. line, which is white and defined by 

 the gray shading which extends across the wing over its course. The shadings 

 are not at all prominent and much lighter than the outer parts of the wing. The 

 outer limit to the pale space is formed by the median shade which is olivaceous 

 gray on the costa, a little oblique to the cell in which it is cut by a pale ray that 

 extends to the reniform ; below the cell it is defined by a rich brown shade which 

 forms a band of moderate width and fades into a bluish gray. The t. p. line is 



TRANS. AM. KNT. SOC, XXIX. (27) JUNE. 1903 



