82 



Catephia alchymista. 



Harpe asymmetrical, square above, without corona, the 

 costal margin on the left side extends, leaving the harpe 

 below the cucullus, to a truncated pillar, the upper surface of 

 which is concave ; on the right side this is peaked ; the 

 clasper on the left side is a plate, broad at the base 

 emarginate before the tip, forming a sharp curved point 

 on the right side it tapers, and extends to a simple arm 

 the uncus ends in a long point, and has a strong scaphium 

 (in this species the uncus is mandibulate) ; the aedoeagus is 

 elbowed in the middle like a boomerang, and is without 

 armature ; the strong juxta is doubly emarginate produced 

 laterally into two peakes, with a third peak in the centre. 



The Catocalas have the largest genitalia, sponsa 

 being the largest of all British species of Noctuidte ; 

 they are strongly generic. 



Catocala fraxini. From J. E. Kobson. 

 Harpe without corona, the costal edge is a thick chitinous 

 tube, to which is attached a hollow sac of thin membrane ; 

 the clasper is a short spatulate arm curled at the tip ; the 

 uncus is almost straight terminating in a curved hook ; 

 the aedceagus is very long and curiously twisted, the base 

 being almost at right angles, and the upper part bent in 

 the opposite direction, forming a rough letter S. The 

 juxta is peaked and divided in the centre. 



Nupta. From S. J. Capper. 



Harpes asymmetrical, the left harpe of thin membrane ; 

 the right harpe peaked, the thickened costa extending 

 considerably beyond the harpe, is dentated on the inner 

 edge ; the clasper is a curved hook, wider on the right side; 

 the uncus is mandibulate, with scaphium ; the aedoeagus is 

 long and slender ; the upper and lower parts both being 

 bent in the same direction ; juxta not pointed. 



Promissa. From S. J. Capper. 



Harpe rounded, with an extended flap on the anal margin ; 

 clasper elbowed, curled at the tip of the arm; uncus mandib- 

 ulate with scaphium ; sedoeagus long and slender, upper and 

 lower parts curved in the same direction ; juxta roughly 

 peaked. 



