43 



Genus I. Olethreutes, lib. tyim: arcuella, CI. 



The broad bead of the vulva disappears and is replaced by 

 a long curved valva with almost parallel Bides. Uncus 



sometimes bilobed. Comuti absent. 



The signs deepen to an extended point 



Olethreutes pruniana, Hb. 3—1 



\'alv;i curved, sides parallel spined above, becoming stronger 

 as the sacculus is approached : From die outer edge a patch 

 of specialised hairs in the form of a squared hook at right 

 angles before reaching the point. Uncus aarrow, with 5 

 or 6 strong spines at the tip. /Edoeagus cardinate, short. 

 Ovipositor flattened, aarrow. Ostium deeply clefl with 

 large spined encircling plate. Signa two, produced, 

 scobinate. 



Olethreutes ochroleucana, Hb. 2—1 



P. Richards. 



Sacculus produced inwardly, terminating with a patch of 

 spines; the outer margin has a large patch of specialised 

 bairs with a curved hook before the point. Uncus bilobed. 

 Ostium rounded with spined encircling plate. 



Olethreutes variegana, Hb. 9—5 



Sacculus protrudes ;i small triangular plate, behind which is 

 a small patch of fine minutely barbed spines. Uncus 

 geniculate before the tip, which is considerably widened and 

 bilobed. 



Ostium cleft, with upright, spined, encircling plate. 



Olethreutes salicella, L. A. Lofthouse. i_j 



Valva long, strongly spined below, reaching to the sacculus. 

 Uncus curved. 



Ostium cleft, with upright spined encircling plate. 



