THE MACRO-LEPIDOPTERA OF UNST. 3 



most valuable species taken. The Rannoch form of the insect is 

 also figured (No. 4) for comparison. 



Agrotis cursoria. — Some of these are as dark as the Noctua 

 glareosa figured ; others are light, but with all the markings very 

 sharply defined. These latter are very unlike the normal form. 

 Figures, 2 and 3. 



A. porphyrea. — The specimens are dark, and often strongly 

 marked ; others suffused ; but all quite unlike those from Arran. 

 There is almost an entire absence of the usual purple colour. 



A. lucernea. — These are very large and dark. 



Pachnobia hyperborea. — The general tint of the specimens is 

 red, and they are more uniform in appearance even than those 

 from Mainland. 



Dianthoscia conspersa. — These are all of the true Shetlandic 

 coloration, but lighter ; some with the markings nearly obliterated, 

 and of a dark leaden brown colour. 



Aplecta occulta. — These are somewhat intermediate in colour 

 between northern and southern specimens. 



Dasypolia templi. — All the specimens are smaller than those 

 taken in Mainland. 



Emmelesia albulata var. thules. — The specimens, as a rule, 

 are even darker than those figured in the ' Entomlogist,' vol. xiii., 

 plate 4, figs. 4 and 5. 



E. venosata. — The ground colour of these is dark gray, but 

 none were captured so dark as those from Mainland. 



E. nanata (?). — I am not quite certain whether the specimens 

 captured are really this insect, but am inclined to think they are 

 extreme boreal varieties of it ; some are very strongly marked 

 with two dark bands across the fore wings ; all are darker than 

 the southern form. They are evidently the same insect as that 

 figured in the 'Entomologist,' vol. xiv., plate 1, figs. 2 and 3; 

 vide also p. 303 of the same volume. 



Melanippe montanata. — It is singular to find that the speci- 

 mens of this insect from Unst are finer than those from 

 Mainland. They vary considerably in the intensity of the ground 

 colour of the wings from light to dark gray, but none are white 

 in this respect. 



Camptogramma bilineata. — The colour of these is peculiarly 

 suffused, with very faint markings ; the singularly dull appearance 

 presented can scarcely be described. 



