146 LLOYDS NATURAL HISTORY, 



female. Ji; is brownish in the male and light grey in the female, 

 with a broad anal tuft, and prominent ovipositor. The fore- 

 wings are long and narrow, somewhat rounded at the tips, with 

 the inner margin curved. They are brownish or greyish-white, 

 dusted with dark brown atoms arranged in streaks. The 

 fringes are chequered with light brown and dark grey. The 

 hind-wings are light grey in the male and whitish in the female. 



The larva feeds on the pith in the stems of the common 

 reed. It is elongated ; yellowish, pale reddish-brown above, 

 with a whitish dorsal line. The head and cervical plates are 

 brown. 



It remains in the portion of the stem which is below the 

 water, or under the ground, until it is about to pupate, when 

 it ascends and makes a rounded excavation towards the surface, 

 leaving only a thin membrane. It then spins a white silky 

 cocoon, and becomes transformed into a long fusiform pupa 

 of a dark brown colour, with very short brownish wing-cases, 

 which form a pointed elevation above the head, and with very 

 fine booklets on the abdominal segments. The moth appears 

 about the end of May, or in June, and is very local in the 

 English fens. 



FAMILY XXXVIII. ARBELID^. 



This is a small family lately founded by Sir George Hampson 

 to recei\ e one or two genera previously included in \kiQZeuzerida, 

 from which they differ chiefly in the absence of a frenulum, 

 and in the nervure bisecting the cells of the wings not being 

 forked. The species, which inhabit India and Ceylon, are of 

 moderate size and of dull colours, and the antennae of the male 

 are bipectinated to the tips. The abdomen is much longer than 

 the hind-wings. The larv?e are wood-borers like the Zeuzeridce, 

 The discoidal cells are divided by a simple nervure. 



