44 



Olcthrcutcs arcuella, Cl. 11 



Valva long, angulated towards centre strong, spined below, 

 throwing out two pedunculate spines from the margin. 

 Uncus geniculate, bilobed. Cornuti about ten short, stout 

 spines. 



Ovipositor flattened. Ostium cup-shaped, minutely 

 spined. Signum a squamous depression. 



Olethreutes atropunctana, Zett. i i 



dimidiana, Sodof. G. T. Porritt. 



Valva widest towards centre where it is angulated before a 

 deep emargination at the succulus, a small patch of spines 

 in the curve; sacculus extended, inwardly spined, and a 

 further patch of spines centrally. Uncus long, slender; 

 socii rounded. ^Edoeagus stout, with a single minute tooth 

 towards apex. 



Ostium cup-shaped, minutely spined. Signa two 

 scobinate depressions. 



Olethreutes penthinana, Gn. 11 



postremana, Z. E. F. Studd. 



Valva long, strong spines below. Uncus short, broad, 

 rounded; transtilla a pair of lobes set with strong spines. 



Ostium deeply cleft, with squamous encircling plate; 

 bursa squamous, without signum. 



GENUS 5. Eudemis, Hb. TYPE profundana, Fab. 



This genus is evidently a remote branch from the preceding 

 genera. The pilleate form of the signa, although derived 

 from some species of the genus Olethreutes, is normally 

 developed; the absence of uncus and the long drooping socii 

 also suggest its transference to the Catoptria group. There 

 is little doubt that in Britain there are many connecting 

 links missing from this genus which might have shed light 

 on its position 



