195 



Tlie follow ing are closely allied forms which can he separated hy 

 appreciable differences, and are therefore entitled to a distinct 

 name. They appear to le the so-called " analogues" of one an- 

 other in the tiuo continents, luhile there is a difference in degree of 

 approximation between them. 



Europe. ' 



Acronycta psi ( Linn.). 

 Acroiiycta alni {Linn.). 

 Agrotis triangulum (Ilicfn.). 

 Mamestra W-latinum {Hufn.). 

 Ilyppa rcctilinea (Esper). 

 Pyropliila pyramidea (L.). 

 Calymnia trapezina (L.). 

 Calocampa vetusta {H'ubu.). 

 Lithomia solidaginis H'ubn. 

 Litliophaue socia (Ilifn.). 

 Plusia festucae (L.). 

 Catocala Elocata (L.). 



America. 



Acronycta occidentalis G. tt- E. 

 Acronycta funeral is G. cC E. 

 Agrotis Normanianus Grote. 

 Mamestra atlantica Grote. 

 Hyppa xylinoides Gtceti. 

 Pyropliila pyramidoides ( Guen.) . 

 Calymnia orina {Guen.). 

 Calocampa nupera Lintn. 

 Lithomia germana {Morr.). 

 Lithophane petnlca Grote. 

 Plusia contexta Grote. 

 Catocala Walshii Edio. 



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

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

 bratica 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. ]\Ir. Eiley's statement that 

 X. cinerea Eiley 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. Poland Thaxter, Newtonvillc, 

 Mass., a specimen of an undescribcd American Lithophane which 

 quite nearly resembles the European conformis, Avitli which I have 

 been able to compare it, while differing in the details of the orna- 

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

 erer who has requested me to describe it. 



