THE BEITISH MUSEUM. 45 



difficult to understand how these three forms, all 

 previously described, could he brought into one 

 genus not related to any of them, except the last 

 species. However, in America, I have recently 

 heard of a genus '''JEimjma^' with a "large number 

 of costal nervules," and a ^^Cosmia^^ from Florida, 

 which T believe is Syparjpax Aurora ! And then 

 there is that old mistake of my own, of which I 

 have lately heard so much that I have really lost 

 all interest in it, the description of a black Arctian 

 (GeomeMca) as a Zygsenid under a new genus. 

 Dr. Boisduval's companionship in a similar case 

 consoled me long ago. 



Apamea Eemissa, Walh. 



The specimen is Fcrigea Zuxa, Grote ; Walker's 

 name is used in the group and for a species in a 

 closely allied genus, perhaps not separable. 



The single specimens representing Celcena JPunc- 

 tifera, Infecta, and Egens are really so poor that 

 I do not think the species can be made out with 

 satisfactory certainty. 



Celsena? Irresoluta, WaXk. 



This is apparently a bad specimen of 0. Chalci- 

 donia. 



Perigea Infelix. 



The specimen (Guenee's type ?) is a dark variety 

 of P. Confederata, mentioned above. 



Perigea Mobilis, Wailc. 



This is P. XanthioideSi Gucn. 



JBerigea JPaii])era, Otlosa, Indicisa, and Centralis 



