42 



Perizoma didymata, L. 64 



Valva rounded; costa strong. Labides united, forming a 

 broad head clothed with short hairs. Uncus tapered, 

 pointed, pads absent. JMceagus short. Cornuti a band of 

 long spines. Manica finely spined. Grists three or four 

 spines. Saccus rounded. Anal tube spined throughout 

 the genus. 



Ostium not encircled, weak. Signum discoid, 

 scobinate. 



Mmorata, Tr. 83 



Valva rounded. Labides united, head pointed. Uncus 

 tapered. ^Edoeagus scobinate above. Manica finely spined. 

 Saccus rounded. 



Ostium encircled. Signum discoid, ovate, scobinate. 



Blandiata, Schiff. adaequata, Bork. 63 



Valva rounded. Labides united, head bilobed. Uncus 

 tapered. ^Edoeagus slightly scobinate. Manica finely 

 spined. Saccus rounded. 



Ostium encircled. Signum discoid, scobinate. 



Bifasciata, Haw. unifasciata, Haw. 55 



Valva rounded. Labides united, head ovate, only spined 

 above. Uncus cylindrical, pointed. ^Edoeagus rounded 

 above, scobinate. Manica finely spined. Saccus rounded. 

 Ostium encircled. Signum discoid, produced pos- 

 teriorly, scobinate. 



Albulata, Schiff. 64 



Valva short. Labides head united, lunate. Uncus 

 tapered. ^Edoeagus scobinate at orifice. Manica finely 

 spined. Juxta indent. Saccus rounded. 



Ostium encircled. Signum discoid, produced pos- 

 teriorly, scobinate. 



