( Ixxx ) 



the European coast so cannot say whether lighter forms are 

 there prevalent. 



"At present I have distinguished 22 species which show 

 more or less constant differences, and no doubt this number 

 could very largely be added to. I should like at this point to 

 again observe that I am not questioning the occurrence of 

 these darker forms in England, but only pointing out that 

 they constitute the type found on the continent as against the 

 paler type from England. 



" Agrotis exclcmnationis. — The English form is more yellow- 

 brown than the continental. I have this species from various 

 London localities, Mucking (Essex), Deal, Sandown, New 

 Forest, Sussex Coast, Devonshire and Cambridge, and German 

 specimens from many Berlin localities. East Prussia, Saxon 

 Erzgebirge and Switzerland. The distinction though not 

 very great seems to be fairly general. 



^'■Agrotis tritici. — English specimens paler yellow-brown with 

 distincter paler markings. I have only Deal tritici from 

 England ; German from Berlin, Plauen and East Prussia. 

 Some of the English specimens are almost as dark as the 

 continental, but no continental are as pale as the English. 

 ^^ Agrotis nigricans. — English specimens are reddish-brown, 

 varying in depth of colour; continental almost black. 



" Agrotis vestigialis. — English specimens paler and yellower. 

 " Mamestra dissimilis {suasa). — English specimens always 

 yellow-brown with darker markings ; continental generally 

 almost unicoloi"ous dark brown with a more or less reddish tinge. 

 I have long series of English specimens from Essex and 

 Sussex coast localities ; continental from Berlin and other 

 German localities, Denmark and Sweden. The English form 

 occm'S at Berlin as a rare aberration. 



" Mamestra genistx. — The English form has the pale 

 markings nearly white; these are always darker in continental 

 specimens, frequently being hardly distinguishable from the 

 ground colour. 



" Mamestra alhicolon. — The English form is yellowish-brown; 

 the continental much darker, being in fact as dark as M. 

 hrassicee, the hind-wings are also much more suffused. 



'■'' Hadenoj sordida. — The English form of this species is 



