38o LEPIDOPTERA. 



1872, three (so-called) specimens having been taken in 

 Derbyshire. By some extraordinary fatality of error, these 

 specimens were afterwards said to belong to a variety of 

 Nodua ncglccta^ Hiib, One of them, now the property of 

 Dr. P. B. Mason, of Burton-on-Trent, is before me. It is 

 evidently a curious unicolorous form of Noctv.a aurjur, the 

 shape of its fore wings differing greatly from that in A. 

 helvdina and in a less degree from N. ncglcda, but agreeing 

 accurately with N. augur. A second specimen is at Burton- 

 on-Trent in the collection of Mr. G. Baker, and is identical 

 with this. Dr. Mason fully agrees with me as to the species 

 to which they actually belong. The third specimen seems to 

 have disappeared. The true A. Iidvdina is found in France, 

 Germany, Switzerland, Piedmont, and the whole Alpine region 

 of the Continent of Europe ; but there is no reason to suppose 

 that it has ever occurred in these Islands.] 



20. A. Ashworthii, Bhld. — Expanse H inch. Fore 

 wings rather truncate, pale slate-grey, with dark grey lines 

 and central shade ; stigmata indistinct ; hind wings pale grey. 



Antennae of the male minutely notched toward the base 

 and finely ciliated throughout ; pale grey, browner in front. 

 Palpi short, with broad oblique tufts, black at the sides, 

 hoary-grey in front ; head hoary-grey, darker above ; entire 

 thorax light slate-grey, minutely dusted with darker ; doubly 

 crested at the back, and the tufts tipped with dark grey ; 

 fascicles broad, smoky-white; abdomen smoky- white, dusted 

 with grey ; lateral and anal tufts rather greyer. Fore wings 

 rather narrow at the base ; costal and dorsal margins slightly 

 rounded ; apex bluntly angulated ; hind margin gently 

 curved and slightly hollowed above ^he anal angle ; colour 

 slate-grey with a bluish tint, finely dusted with black ; basal 

 line abbreviated, doubly curved, deep black ; first line nearly 

 perpendicular, much indented, deep black; second line also 

 black, more slender, deeply zigzagged throughout and with 

 black dots at the angles ; subtermiual line undulating and 



