ACIDALIID.E—ACIDAIJA. 17 



Plentiful throughout the whole of Ireland. Abroad it 

 has a wide range : Central Europe, Northern Italy, 

 Dalmatia, Finland, South - Eastern Russia, Bithynia. 

 Armenia, Eastern Siberia, Tartary, China, Japan, and 

 Corea. 



(>. A. trigeminata, Haw. — Expanse % inch. Wings 

 rather narrow, brownish-white ; costa of fore wings black- 

 brown to the middle ; beyond the second line is a distinct 

 blackish-brown transverse stripe partially divided into three 

 blotches. Hind wings more faintly clouded. 



Antennas of the male notched, coarsely ciliated, brownish- 

 white ; palpi slender, pale brown ; eyes black-brown ; face 

 dark brown ; top of the head white ; thorax and abdomen 

 weak and slender, whitish-brown dusted with darker ; lateral 

 and anal tufts small. Fore wings rather elongated ; costa 

 faintly arched, but decidedly so toward the apex, which is 

 bluntly angulated ; hind margin smoothly rounded ; dorsal 

 margin also a little rounded and strong]}' ciliated ; colour a 

 delicate soft shade of brownish- white ; costa brown-black from 

 the base to near the middle, and this followed by a faint costal 

 shade of yellow-brown ; first line slender and very faint, 

 mainly indicated by light brown dots on the nervures and 

 dorsal margin ; second line irregularly curved, smoky black, 

 forming the inner edge of a smoky brown or black-brown 

 transverse stripe, which is twice deeply excavated on the 

 outer edge, so as to form three connected blotches ; beyond 

 it is usually a faint and incomplete irregular parallel cloud 

 or line of the same colour ; discal spot a small black-brown 

 dot; above it, on the costa, is a similar dot indicating the 

 commencement of a central brown line, which, however, is 

 often imperceptible, and never distinct ; e.xtreme hind margin 

 very minutely dotted with brown ; cilia brownish-white. 

 Hind wings rounded behind, brownish-white, with a black 

 central dot; beyond this, forming a continuation of the dark 

 stripe of the fore svings, are faint cloudy indications of a 



VOL. VIII. B 



