The Scottish Naturalist. 139 



it and the tip of the wing is a white spot. Marginal spots 

 margined inwardly with white. H.-w. dark grey. 10- 11 L. 



July. Central and Northern Europe. Local in Britain, having only been 

 found as yet in Perthshire (Rannoch), Inverness-shire (Spean Bridge), and 

 Sutherlandshire (Inveran and Inver). On moors. 



[Herhujldlus H.S. is another northern species, and might occur. It is dark 

 fuscous-brown, with a short bifid white streak, and a white spot between the 

 streak and the hind line, but not near either. AUenellus Zk, also a northern 

 species, is dark brown, with a toothed central white streak, a white spot 

 before the hind line, and a series of short parallel white lines under the spot.] 



Note.— The above four species bear a strong resemblance to each other, but 

 may be easily distinguished : — hamelhisby the single central white streak toothed 

 below ; pascaeUns by the colon?* of the head and thorax, and by the central white 

 streak near the costa, as well as by the evidently produced tip of the front wing ; 

 silvellus by the white spot at the end of the white streak being continued up to 

 the hind-margin ; and ericellus by the narrow central white streak. 



2. Central streak longitudinally fissured, or with a nar- 

 rower white streak betiveen it and the costa. 



tjTjIGINOSELLTJS z— Palpi above, and head and thorax in 

 the centre whitish. F.-w. (with tip very slightly produced) 

 glossy, pale brownish-ochreous, inner-margin narrowly white. 

 Central streak white, close to the costa at its basal half, fissured 

 below by the sub-costal vein, the lower branch toothed below 

 in the middle, and continued nearly to the hind line, its apex 

 acuminated ; an oblong white spot between the central streak 

 and the hind line, which is silvery. H.-w. whitish, grey along 

 the costa. An aberration of the male has the central streak 

 smoky. 8-10 L. 



End of June. Occurs in Silesia and Piedmont. Local in Britain, and only 

 in the south, 



PRATELLTJS L.-F.-w. (with tip produced) greyish-brown, 

 (paler in the female); a sub-costal line, a narrow central streak 

 toothed below beyond the middle, and a wedge-shaped spot be- 

 tween their extremities, white ; an oblong white spot before the 

 silvery hind line. H -w. grey. Sometimes the sub-costal line 

 and wedge-shaped spot are concealed by fuscous. 9-10 L. 



May-August. 'Central and Northern Europe. The commonest species in 

 Britain, occurring probably throughout. 



dumetellus H— F.-w. (with tip produced) brownish or 

 greyish ochreous : a short subcostal line, a sharp-pointed central 



