138 THE GENERA OF BRITISH MOTHS. 
The other species, C. Bergmanniuna, is casily distinguished by the absence of the conspicuous whitish spot 
at the front of the fore wings; instead of which the whole of the front wings are pale oclreous, with deeper 
pencillings, and two diagonal bands of pale silvery gray. 
The genus Argyrotoza. The only British species assigned to this genus has the palpi about twice as long 
as the head ; the wings not quite so elongated as those in the immediately preceding genera; the front line of 
the anterior wings regularly, but not abruptly, arched from the shoulder. 
Argyrotoza Conwayana (the Conwayian T, No. 17). The Caterpillar of this species feeds on Privet, and 
the perfect insect, which appears in June, is widely distributed, and common everywhere. 
The genus Plycholoma. In this genus the palpi of the perfect insect are not longer than the head, and 
the antenna also are short. The wings are of more elongated form than those of the last genus. The males 
have the front margin of the anterior wings singularly thickened. In My. Stainton’s characters of this genus, 
he says the costa in the male is broadly folded to the middle, and then straight ; in the female it is regularly 
arched. The wings are also distinguished hy more or less distinct golden or silvery stripes or markings. There 
is but one British species, . 
Plycholoma Lechcana (the Lechean T, No. 18). The dark wings of this species are distinguished by 
markings of a dull tarnished silvery character, which resemble in form the Greek letters I, which, however, 
are scarcely traceable in some specimens, especially the females. The Caterpillar feeds on Oak in May, and 
the Moth appears in June and July, being very common. 
The genus Zulia. The insects assigned ‘to this genus have the palpi projecting slightly beyond the 
head; the body rather robust ; the fore wings twice as long as broad, with the front edge regularly arched 
from the shoulder. There is but one British species. 
Lulia Ministrana (the Yellow-barred Iron T, No. 19). The Caterpillar of this species is green, and is 
said to feed upon the Hazel. The Moth appears in June, and is generally common. 
