LEPIDOPTERA HETEROCERA. 61 



Group 6. 

 Like the seventh European group. 



40. ACRONYCTA DECLARATA. 



Nigra ; thorax albo varius ; abdomen cinereum ; alee anticee ni- 

 gricantes fasciis quatuor angulosis albis nigro marginatis, 

 annulis duobus albis ; posticce cance, apud marginem exterio- 

 rem nigrum fascescentes. 



Black. Thorax with some white marks. Abdomen cinereous. 

 Fore wings blackish, with four irregular zigzag white black- 

 bordered bands, and with two white ringlets, of which the exterior 

 one is much brighter and more conspicuous than the interior one. 

 Hind wings hoary, brown towards the exterior border, which is 

 black. Length of the body 6 lines ; of the wings 16 lines. 



Canada. In Mr. Saunders' collection. 



41. ACRONYCTA IMPRESSA. 



Albida ; thorax nigro conspersus ; alee anticce sat angustce, punctis 

 nigris conspersce et trimaculatce ; posticce cinereee, basi albidee. 



Whitish. Thorax speckled with black. Fore wings rather 

 narrow, thickly speckled with black ; the specks in some parts con- 

 fluent, and forming three large diffuse black spots. Hind wings 

 cinereous, whitish towards the base. Length of the body 6 lines ; 

 of the wings 14 lines. 



a. St. Martin's Falls, Albany River, Hudson's Bay. Presented by 

 Dr. Barns ton. 



42. ACRONYCTA INSITA. 



Cana ; alee guttis marginalibus nigris ; einticee apud costam nigro 

 notatce, fasciis gutlularibus annulisque duobus discalibus in- 

 completis nigricantibus, fascia exteriore e lunulis nigris ; pos- 

 ticce albidce, gutta fasciaque nigricantibus . 



Hoary. Wings with black dots along the exterior border. 

 Fore wings with blackish marks along the costa, with some imperfect 

 dotted blackish bands, with two incomplete blackish discal ringlets, 

 and with an exterior undulating more complete band composed of 



