26 



Hystcrosia amandana, H-S 1—1 



Sacculus short, terminating in serrate point; transtilla 

 indent, spined. Uncus curved; socii lobed. /Edceagus 

 stout pointed, with spine near orifice. Cornuti a pair of 

 strong spines. 



Ovipositor flattened, angulate. Ostium very wide; 

 bursa thickened, in folds. 



Genus 3. type 



maculosana, Haw. 8—1 



Valva simple: costa thickened; sacculus broad, tapered, 

 ending before the valvula. Uncus stout, pointed; socii 

 short drooping; anal plate indent at the point. ^Edceagus 

 with long orifice; cornuti short, very numerous, about 40. 

 Ostium cleft; ductus bursa? irregularly asymmetrical, 

 strong; bursa small, delicate, simple. 



G-enus 4. Clysia, Hb. type ambiguella, Hb. 



Valva short; sacculus broad; transtilla produced in two 

 arms; socii strongly chitinised. ^Edceagus short, stout; 

 vesica very large, elaborately set with spines; cornutus long, 

 slender, often broken during copulation. 



Ovipositor flattened. Ductus bursa? short; bursa 

 heavily spined. 



Clysia angustana, 7V. A. C. Vine, J. W. M. 5—1 

 var thuliana. Vaughan, Adkin and Whittle, l — 1 



We can see no difference in the genitalia of these two forms. 



Sacculus merges into the valvula; transtilla arms 

 partially fused together. 



Bursa heavily spined. 



Clysia ambiguella, Hb. 1—1 



S. J. Capper, B. Adkin. 



Sacculus terminating in short spines; transtilla divided in 



two dentate arms; socii pointed. 



Spines on bursa make a prominent central star. 



