1881.] NORTH-AMKRICAN TINEID.E. 307 



California, in August 1871. I can detect no appreciable difference 

 between the American and the European forms. 



The absence of any defined anal angle in the fore wings, although 

 the cilia somewhat replace it in appearance, will at once enable C. 

 instdbilella to be distinguished from the following new species ((7. 

 falciferella, Wism.). 



Cerostoma falciferella, sp. nov, (Plate XXXV. fig. 7.) 



Capite cum palpis griseo atomosis ; alls anticis angustis, quam 

 latioribus quadrupio longioribus, margine apicali falciformi, 

 fidvo-griseis, fasciis duabus a margine dorsali obliquis sub- 

 obsoletis ; posticis dilute cinereis. 



Head speckled grey ; the tufted palpi projecting more than twice 

 the length of the head beyond it, speckled grey. 



Fore wings narrow, fully four times as long as wide, the apex ex- 

 tremely falcate, the anal angle well defined, its projecting cilia giving 

 a falciform appearance to the apical margin, rusty grey, with a slight 

 tawny shade upon their costal half not extending to the apex. There 

 are two subobsolete slightly darker fasciae scarcely distinguishable, 

 except towards the dorsal margin, from which they tend obliquely 

 outwards — the one scarcely beyond the middle, the other halfway 

 between this and the base of the wing ; and in some specimens is a 

 narrow and rather angulated tawny fuscous streak running from the 

 end of the cell to a point immediately above the apex, and another 

 from the base of the wing below the middle running parallel to the 

 first half of the dorsal margin. 



Hind wings and their cilia pale cinereous. 



Expanse 25-28 miUims. 



Twelve specimens, Mount Shasta, California, August 1871 ; six 

 specimens, Camp Watson, Northern Oregon, beginning of April. 



This species is larger than C. instabilella, which usually expands 

 about 21 or 22 millims., and is distinguishable from it by the develop- 

 ment of the anal angle of the fore wings and by its broader hind wings. 



Cerostoma radiatella (Donovan). 



I took seventeen specimens of this species at Camp "Watson in 

 Northern Oregon, which exhibit an equal range of variation to that 

 which is attained by the same species in Europe. They occurred in 

 April 18/2, probably after hibernation; but for the most part they 

 are in good condition. 



Cerostoma cervella, sp. nov. (Plate XXXV. fig. 8.) 



Capite dilute cervino, ore et palpis supra pallidioribus ; antennis 

 albo et fusco annul atis ; atis anticis costa arcuata apice non 

 fulcata, cum ciliis, subpurpurascenti-cervinis, striga diffusa 

 purpureo-fusca a terno basali usque ad apicem divisis, maculis 

 duabus in margine dorsali purpureo-fuscis, ^mma apud angulum 

 basalem, secunda paulo post medium; posticis dilute fulvido- 

 griseis, ciliis paulo pallidioribus ; abdomine supra cinereo, infra 

 albido. 



