The Scottish Naturalist. 171 



* 7. Agrotis strigula Thnb.. {Agrotis porphyrea Sv.) Frey 

 Alp. ; Stdfs. Sil. Mont. ; H. Here. Mont. 



Larger and darker than our Lowland specimens ; but exactly 

 like those of the Upper Harz. August. 



8. Agrotis pronuba L. (Triphcena pronnbala) Stgr. IsL ; 

 Frey Alp. ; Stdfs. Sil. Mont. ; H. Here. Mont. 



Ordinary form. End of June and July. 



* 9. Agrotis hyperborea, var. alpina Westw. (Pachnobia 

 alpina Westw.) ; Stgr. and Wk. Lap. ; Wk. Norv. Alp.; Sch. Fen.; 

 Frey Alp. ; Stdfs. Sil. Mont. 



Duller coloured and less variegated than the alpina of the Scot- 

 tish Highlands, and therefore more like the type-form hyperborea. 

 July. {Entomologist, 1880; plate 4, figs. 14 and 15.) 



I received frcm Mr. Mac Arthur a very well-preserved larva, 

 which exactly, even to the minutest detail, corresponds with Dr. 

 Staudinger's description of the larva of hyperborea. {Stett. Ent. 

 Zeit., 1881, p. 361.) Dr. Staudinger writes: — " Above, on each 

 side, runs a pale line, on the inside of which, at the beginning of 

 each segment, lies a short black streak." In my larva, the black 

 streaks are first visible on the fourth segment, they become more 

 marked up to the tenth segment, and with the middle line of the 

 back at the end of each segment form regular wedges, which are 

 thus turned with the points backwards. Dr. Staudinger writes 

 farther : — " The two last black streaks converge backwards." In 

 my larva they run exactly like the others, but are weaker. In 

 these respects the larva of the Shetland form is different from that 

 of the Lapland form. But as I possess only one specimen, as I 

 said before, I could not determine whether these characteristics 

 were constant. The larva, according to Mr. MacArthur, lives 

 hidden under moss, and feeds on the young branches of a species 

 of Vaccinium. 



10. Agrotis C-nigrum L. {NoctitaC-ntgrum'L.) Frey Alp.; 

 Stdfs. Sil. Mont. ; Spr. Verbr. Lap. Ordinary form. July, rare. 



* 11. Agrotis xanthographa Sv. var. {Noctua xaiitho- 

 grapha SV.). I have, through the kindness of Dr. Staudinger, got 

 this species from the most different places ; among them one pair is 

 a pale gray, with a light yellow tinge of Sicilen. I possess, in my 

 own collection, a number of varieties of this species ; but in none 

 do I find any approach to the Shetland form, the upper wings of 

 which have very coarse scales, and are a deep black-brown, with 



