AMERICAN LEPIDOPTERA. 87 



owing to our want of material. They are usually larger and brilliantly 

 colored. The genus is first described by Dr. Clemens (who mistakenly 

 regarded it as belonging to the Tortricidae) under the name of Dyso- 

 dea, Proc. Acad. Nat. Sci. Phil. p. 349 (1860), where a very interest- 

 ing account of the peculiar larva may be found. Our species is Dyso- 

 dea oculatana, 67(?»«.c;(.s= Fr/y-nia j;A^?i«, Walk.., p. S26^Plafi/t]ii/ris 

 fasciata, G. & R. Ann. X. Y. Lye. Vol. viii, Plate 13, fig. 4—5. The 

 fact of the identity of this latter with his Dysodea oculatana was com- 

 municated to us by Dr. Clemens who referred to the circumstance that 

 the position he had assigned the species, in a chissificatory point of 

 view, made the identification of his description difficult. The first 

 description of a species of this genus is by Dr. Boisduval, whose 

 Thyris vitrina, Mon. Zyg. pi. 1, fig. 5, belongs to this genus. Of the 

 locality of the species Dr. Koisduval says : Cette espece se trouve dans 

 difFerentes contrees de I'Amerique septentrionale; on me I'a aussi 

 envoyee comme se trouvant en Andalousie, mais il parait qu'elle y est 

 beaucoup plus rare que dans les Etats-Unis (1. c. p. 20). Differences 

 in his description and figure, when compared with our species, induced 

 us to describe the latter as new, forming a new genus to receive them 

 both and keeping it as a group — Platythyrini — near Thyris lUii].^ to 

 which genus Dr. Boisduval refers the first species noticed by Ento- 

 mologists. Had Dr. Clemens seen Boisduval's figure he would have 

 been probably enabled to refer his species as allied to Thyris vitrina. 

 Staudinger, in his I'ecently published Catalogue of European Lepidop- 

 tera, refers to Boisduval's species as American, but probably merely as 

 a matter of opinion. The species figured by Boisduval, and which 

 should be known as Dysodea vitrina, has not yet been taken to our 

 knowledge in the United States unless we can suppose it to be the 

 same with that described later on by Dr. Clemens and ourselves. We 

 have a second species described by Mr. Walker, as from the United 

 States, but also doubtfully. This is Dysodea aequalis ( Varnia aequa- 

 Us, Walk., p. Q2:-)=F {V)arnia Jiagrata, Walk., p. 826). In regard 

 to the location of the genus, we had left it as a group of Thyridae ; for 

 its structural details our remarks (Ann. N. Y. Lye. 1. c.) and those of 

 Dr. Clemens (1. c.) will be of interest. Mr. Walker refers it to the 

 Noctuidae where it will not unlikely be finally referred. 



Pluswdonta ? purpurascens, Walk., p. 842, belongs to Calpe, and is=: 

 Calpr canadensis, Bethune. 



Oracsla. sobria, Walk., p. 846=Calpe purpurascens (Walk.). 



Eudidia designata, Walk., p. 985=:Anthoecia marginata {Ilaic). 



