195 



The follmmig are closely allied forms wldcli can he separated ly 

 aiypreciable differences, and are therefore entitled to a distinct 

 name. They appear to he the so-called " analogiies" of one an- 

 other in the fivo continents, while there is a difference in degree of 

 ap2Jroximatio7i hetweeii them. 



Europe. 



Acronycta psi ( Linn.). 

 Acrouycta alni {Linn.). 

 Agrotis triangulum {Hiifn.). 

 Mamestra W-latinum {Hifn.). 

 Hyppa rectilinea [Esper). 

 Pyropliila pyramidea {L.). 

 Calymnia trapezina {L.). 

 Calocampa vetusta [Huhn.). 

 Litliomia solidaginis ITabn. 

 Lithophaue socia {Hufn.). 

 Plusia festiTcae [L.). 

 Catocala Elocata {L.). 



America. 



Acronycta occidentalis G. d- R. 

 Acronycta fiineralis G. & R. 

 Agrotis Normanianus Grote. 

 Mamestra atlantica Grote. 

 Hyppa xylinoides Guen. 

 Pyropliila pyramidoides ( Guen.) . 

 Calymnia orina {Guen.). 

 Calocampa nupera Lintn. 

 Litliomia germana {Morr.). 

 Litliopliane petulca Grote. 

 Plusia contexta Grote. 

 Catocala Walsliii Edto. 



To this list might be added Cucullia intermedia Speyer, on ac- 

 count of the probability that it is the species regarded as um- 

 hratica by Guenee. But a close study of the specific character in 

 the genus shows that the resemblance is not close, and perhaps, as 

 in the case of Catocala fraxini, Guenee may have had a specimen 

 before him with an erroneous habitat. Mr. Eiley's statement that 

 X. cinerea Riley is the "analogue" of the European conformis 

 seems to me quite incorrect, and the species are not included in the 

 foregoing table. 



I have received, however, from Mr. Roland Thaxter, Newtonville, 

 Mass., a specimen of an undcscribed American Litliopliane which 

 quite nearly resembles the European conformis, with Avhich I have 

 been al)le to compare it, Avhile differing in the details of the orna- 

 mentation of the primaries. I dedicate the species to its discov- 

 erer who has requested me to descril)c it. 



