LEPIDOPTERA OF LAKE SUPERIOR. 391 



known varieties of which it differs in having the arcuated white line 

 on the thorax, and the black band on the hindwings. The situation 

 of this band is not so far back as the black spots found on the hind- 

 wings of the allied species. The banded hindwings, with the en- 

 tirely black or dusky antennae, will sufficiently distinguish this species 

 from the Arctia Americana, a description of which is here added for 

 the purpose of comparison. 



Arctia Americana H. 



PI. VII., fig. 5. 



Arctia Americana Harris, Report on Insects injurious to Vegetation, 

 p. 246 (1841). 



Alis primoribus brunneis, maculis, rivulisque albidis ; secundariis 

 fulvo-flavis, maculis unica media reniformi, tribusque posticis rotundis 

 nigris ; abdomine fulvo, dorso nigro-quadrimaculato. 



Alar. exp. unc. 2J. 



Head brown, antennoe white above, with brown pectinations. 

 Thorax brown above, margined before with an arcuated yellowish 

 white band, which is continued on the outer edge of the shoulder- 

 covers ; upper edge of the collar crimson-red. Forewings coffee- 

 brown, with three yellowish white spots on the outer edge, and 

 crossed by irregular anastomozing yellowish white lines. Hind- 

 wings bright ochre-yellow, with a large reniform central black spot, 

 two round black spots behind, a third smaller spot near the anal 

 angle, and a black dot between the middle and the inner margin. 

 Abdomen tawny, with four blackish dorsal spots. Legs dusky, the 

 thighs and anterior tibise fringed with red hairs ; the hindmost tarsi 

 whitish, annulated with black. 



This species, which is now for the first time figured, was taken by 

 Mr. Edward Doubleday, near Trenton Falls. From the Caja it is 

 distinguished, like the Parthenos, by the arcuated white margin of the 

 thorax, &c. The arrangement of the white spots and rivulets on 

 the forewings is the same as in the European species. 



