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Show 1881.] NORTH-AMERICAN 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. instabilella to be distinguished from the following new species (G. falciferella, Wlsm.). CEROSTOMA FALCIFERELLA, sp. nov. (Plate XXXV. fig. 7.) Capite cum palpis griseo atomosis; alis anticis angustis, quam latioribus epiadruplo longioribus, margine apicali falciformi, fulvo-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 extremely 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 millims. 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 development 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 1872, probably after hibernation; but for the most part they are in good condition. CEROSTOMA CERVELLA, sp. nov. (Plate XXXV. fig. 8.) Capite dilute cervi.no, ore et palpis supra pallidioribus; antennis albo et fusco annulatis; alis anticis costa arcuata apice non falcata, cum ciliis, subpurpurascenti-cervinis, striga diffusa purpureo-fusca a terno basali usque ad apicem divisis, maculis duabus in margine dorsali pur pur eo-fuscis, prima apud angulum basalem, secunda paulo post medium; posticis dilutefulvido-griseis, ciliis paulo pallidioribus; abdomine supra cinerea, infra albido. |