12 



between the genitalia of this species and liturala, unless 

 the papilla is larger. 



Alternata, Hb. 42 



Valvula ample; first papilla raised, broad; second papilla 

 small, scobinate; third broad, sometimes divided into two, 

 bearing large spines. /Edoeagus pointed. Cornuti oval 

 patch. Saccus broad, rounded. Octavals deeply cleft. 



Ostium produced, with operculum. Bursa elongate, 

 delicate. Signum discoid, stellate, large. 



Limbaria, Fb. 5 2 



Valvula ample; without papillae. Uncus pointed, without 

 the pan* of spines. Gnathos tip swoollen, rounded, 

 squamous. .^Edceagus broad, pointed. Cornuti weak, in 

 radiating broken bands. Saccus pointed. Octavals absent. 

 Ostium with operculum. Signum discoid, stellate, 

 small. 



A group of five species which seem to have little 

 connection with any other group, or even with each other, 

 except margaritata and prosapiaria. Asymmetry in species 

 seems to denote transitional forms. 



Angerona pnmaria, L. 42 



Valva shape irregular; costa spined at apex; costal arm 

 produced, curved, spined at apex. Uncus bluntly rounded. 

 Gnathos broad, tip scobinate. ^doeagus stumpy. 

 Cornutus bifurcate towards tip. Saccus rounded. Margin 

 of eighth sternite bilobed. 



*0stium with operculum. Signum a ring of thickened 

 chitine. 



Camprea margaritata, L. 103 



Valva widely and deeply emarginate, apex widened, 

 incurved, outer margin curved, bearing towards apex a 

 short pedunculate spine; costal arms asymmetrical, left 



* Drawing of ostium reduced by one-half. 



