288 LEPIDOPTERA. 



the only reliable occurrence seems to be a capture, by the 

 late Mr. R. S. Fetherstonhaugh, of a single specimen in 

 Dublin, which Mr. Kane very reasonably suggests may have 

 been accidentally introduced, on an imported clematis, in the 

 larva state. Abroad it is found throughout Central Europe, 

 the more temperate portions of Northern Europe except 

 Finland, South-Eastern Europe, Central Italy, Corsica, 

 Bithynia, Turkey, and the mountain regions of Central 

 Asia, 



2. I. lactaearia, L. — Expanse \ to 1 inch. Very slender, 

 small and weak ; white faintly tinted with blue-green, which 

 is extremely evanescent ; two faint silvery-white transverse 

 lines are continuous on all the wings. 



Antennae of the male pectinated with slender oblique 

 ciliated teeth, white, the teeth whitish -brown ; palpi small 

 and very slender, and, with the face, pale olive-brown or 

 yellow-brown ; upper part of the head abruptly shining 

 white ; thorax weak and slender, greenish-white ; abdomen 

 smooth, glossy white ; lateral tufts rather large ; anal tuft 

 small and conical. Fore wings blunt, of thin texture, and 

 silky ; costa arched ; apex very bluntly angulated ; hind mar- 

 gin a little oblique, but hardly curved; dorsal margin faintly 

 rounded, strongly ciliated ; texture thin and shining ; colour 

 extremely pale blnish-green, or white with a green shade ; first 

 line erect, indistinct, gently curved, white; second line also 

 white, nearly erect, and tolerably straight; cilia rather long, 

 white. Hind wings elongated, angulated behind; of the 

 same tint of greenish-white, with a single slender, strongly 

 curved, white central transverse line ; cilia long, white. 

 Female hardly stouter, extremely similar, but with simple 

 antennae. 



Undersides of all the wings shining white, the basal portion 

 and costa of the fore wings tinged with green. Body and 

 legs silky-white. 



Not variable, except, perhaps, a little in size ; but the 



