86 ANNALS OF SCOTTISH NATURAL HISTORY 



within the counties of Aberdeen, Perth, Elgin, and Kincardine. 

 It has been found in fair numbers in Perthshire for several 

 years. Aberdeenshire can also show a long array of records. 

 I had sixty specimens on my setting boards last year (1892) ; 

 and it has been taken regularly in the place where I found 

 mine for the last five years. " The larva feeds in silken 

 galleries under moss on stones, in which galleries it hybernates, 

 pupating the following May." From what I have seen of 

 the localities where Myelins is found, I do not think that 

 it is necessary there should be stones below the moss. I 

 think it may probably feed among the moss. 



Section V. — Fore-wings with, or without, a more or less 

 distinct longitudinal streak, and generally two transverse 

 lines. 



a. First transverse line very indistinct. C. tristrellus. 



b. Both transverse lines distinct. C. inquinatellus. 



c. Lines sharply angulated at costa. C. geniculeus. 



Crambus tristrellus, Fb. 



Antennce, yellow ochreous. Palpi, yellow ochreous. 

 Head, yellowish, yellow ochreous, or ochreous brown. 

 Thorax, different shades of ochreous, or ochreous brown. 

 Fore-wings, pale yellowish, yellow ochreous, ochreous brown, 

 or dark brown with an ochreous tinge ; very variable in 

 shade and depth of ground colour, costal portion darkest ; 

 a more or less distinct white streak from base to outer 

 margin ; an angulated transverse line before the centre 

 of wing, — this line is often only to be distinguished by 

 a dark spot on fold, — and an angulated transverse line 

 near outer margin ; veins generally paler. Hind-wings, 

 glaucous gray or pale gray, fringes paler. Abdomen, pale 

 whitish ochreous. Legs, pale ochreous. Expands about 

 27 mm. 



Occurs in July and August among rough herbage. Flies 

 naturally at dusk and by night, and is an abundant species 

 almost everywhere. It is the largest Crambus found in 

 Scotland. " The larva feeds on grasses in a vertical silken 

 tube, and pupates amongst the roots after hybernating." 



