Explanation of Plate IV. 

 S. Genital armature. 



The figures on this and the following plates (all x 20) show 

 the aedeagus or genital armature (= tegmen and median lobe 

 united, the portion of the membranous internal sac sometimes seen 

 extruding from the anterior aspect of the median lobe omitted) of 

 the males, mainly from the dorsal aspect, or in profile, somewhat 

 obliquely. The apical portions are placed forwards. The asymmetric 

 lateral lobes are described from this view in the accompanying text, 

 and are therefore reversed from their actual position in the insect. 



Figs, 1, la. Daiphron lyciforme, Gorh. : 1, profile, showing mem- 

 branous base of median lobe; 1«, 

 dorsal aspect. 



2, 2a. „ personatum, n. sp.: 2, profile ; 2a, dorsal aspect. 



3,3a. ,, lineatum, Tic: 3, profile; 3a, dorsal aspect. 



4, ,, crassicorne, Gorh. : 4, dorsal aspect. 



5, 5a. Chauliognathus proteus, Gorli. : 5, profile ; 5a, dorsal 



aspect. 



6, 6a. „ corvinus, Gorh. : 6, profile ; 6a, dorsal 



aspect. 

 [7, la. „ morio, Gorh. : 7, profile ; 7a, dorsal 



aspect.] 

 8, 8a. „ sodalis, Waterh. : 8, profile ; 8a, dorsal 



aspect. 



