82 Journal New York Entomological Society. [Voi. x. 



Hiibner includes three species under this definition. The first, 

 ain Hiibn., is not congeneric with the others, being referable Xo Aiito- 

 grapha. I have therefore regarded the second, divergens Fab., = 

 hochemoarthi Hoch., as the type. Under this restriction Caloplusia 

 Smith is synonymous. The restriction was made by Guenee (Spec. 

 Gen., VI, 355) in 1852, who excluded ain from his section Sy/ignip/ia. 

 Hiibner evidently intended to include all the yellow hind-winged Plu- 

 sias in Sy/igfapha, but this group can not be structurally defined. 



CONTRIBUTIONS TO THE KNOWLEDGE OF 

 NORTH AMERICAN ARCTIIDiE.— III. 



(Plate XI.) 



Bv Otto Seifert. 



Arctia radians ]Valker. 



Apantesis radians Wa'LV:.^^, Cat. Lep. Het., pt. Ill, 1S55, p. 632 (female). 

 Arctia phalerata var. incompleta BuTLER, Ann. Mag. Nat. Hist., Vol. VIII, 5th 

 Ser., 1S81, p. 311 (male). 



Several Arctia larv^ were found hidden under boards during the 

 daytime in rich hammock clearings at Island Grove, Florida, in differ- 

 ent stages of development from the beginning of March to the middle 

 of May. The larvae were velvety black with a dorsal chain of milk- 

 white spots and with reddish subventral hairs. They were fed with 

 what appeared to be a variety of Taraxacum. First pupa obtained 

 May 8th transformed to imago (9) May i8th. Exposed at the ham- 

 mock clearing, the 9 was found with a $ the next morning and de- 

 posited eggs at once. These were taken to New York City, May 20th. 



Eggs. — " Obtuse cones, ' ' light straw color with rather bright, appar- 

 ently smooth surface, the fine reticulations only visible when magnified. 

 Diameter at base about 0.65 mm. At the time of exposure the tem- 

 perature at Island Grove was about 37° C. On arrival in New York 

 the weather was continuously rainy and cold, almost without exception, 

 the thermometer vacillating between 13° C. and 18° C. till nearly 

 June. June ist, early in the morning the young larvae left their egg- 

 shells of which they ate the larger part and remained idly for hours 



