LEPlDOPTEROUS FAUNA OF PORTLAND. 59 



however, of the usual light Southern form. This dark variety is 

 occasionally found in the South of England, but only occurs 

 regularly in Scotland. At Rannoch, in Perthshire, I found it in 1876 

 with the ordinary light form, and intermediate ones in much the 

 same way as the var. Portlandica occurs at Portland. None of these 

 species, however, are specially fond of sitting on the rocks. The 

 following are the moths, besides those particularly mentioned, which 

 I have noticed as being most subject to variation at Portland : 

 Aporophyla australis, the ground colour varies from white to dark 



grey. 



Heliophobus hispidtis, dark and light forms occur. (See plate.) 

 Luperina testacea. Besides the ordinary varieties, including a 

 very dark one taken by myself, I saw a beautiful, very 

 distinctly, and delicately marked variety (Gueneei) of this 

 species taken by Colonel Partridge this year. 

 Apamea basilinea, varies in tint of ground colour. 

 Apamea oculea, varies, if possible, more than usual. 

 Miana strigilis, varies very much, and has a variety, with a bright 

 coppery-red bar, which I have not seen elsewhere, but 

 which is here not uncommon. 



Miana furuncula, seems to vary even more than I have seen it 

 do at Brandon, in Norfolk, where it was very abundant 

 and variable. 



Grammesia trilinea, var. bilinea, is not uncommon. 

 Agrotis exclamationis. I saw a variety taken at Portland with 

 confluent spots it is generally rather variable at Portland. 

 Agrotis corticea. 

 Agrotis ripce, varies from almost white to grey and pale ochreous, 



speckled with darker. 

 Triphcena orlo?ia, has many varieties, including reddish-brown 



and blackish varieties. 

 Triplicena pronuba, shews beautiful varieties, dark and light, and 



variegated. 



Ancliocelis lunosa, ground colour very variable. 

 Eupithecia absynthiata, variable in the amount of marking. 



