Plate III 



INTRAFAMILY VARIATION OF THE PSELAPHID AEDEAGUS 

 {Continued) AND THE PENIAL PLATE 



Fig. 1. Tyrus humeralis (Aube). Male pygidial area. S6 (sixtli sternite); To 

 (fifth tergite) ; pp (penial plate). 

 Tyrus humeralis (Aube ) . Female pygidial area. 



Tyrus humeralis (AubeL Aedeagus, dorsal view. 0.381 x 0.167 mm. 

 Tyrus humeralis (Aube). Right lateral view. (Reversed drawing) 

 Tyrus humeralis (Aube). Left lateral view. (Normal orientation) 

 Tyrogatunus zeteki Park. Ventral abdominal surface: female on left; 

 male on right. Drawn from types. Note remarkable long, matted 

 pubescence, shown on right, pp (penial plate, note the homology 

 with Tyrus ) . 

 Fig. 7. Cedius ziegleri LeConte. Aedeagus, dorsal view. 0.502 x 0.167 mm. 

 Note that the asymmetrv is to the left. The penial plate swings 

 to the left. 

 Fig. 8. Cedius spinosus LeConte. Dorsal view. 0.361 x 0.124 mm. Note that 

 the asymmetry is to the right. The penial plate swings to the right. 

 Fig. 9. Cedius cruralis Park. Dorsal view. 0.335 x 0.134 mm. Note that the 

 asymmetry is to the left. The penial plate swings to the left. 



