224 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



Fig. 1 8. — Ludius triundulatiis group. 



.^-^' f' 9, Ludius trmndulattis (Randall): a, nasale and subnasale, ventral 

 view ; b, mediotergite of fifth abdominal segment, dorsal view ; c, fifth abdominal 

 segment, ventral view; d, second and third segments of left antenna, ventral 

 view ; /, left urogomphus, lateral view ; g, ninth abdominal segment, dorsal view. 

 e, L. nebraskensis (Bland) (?) : left urogomphus, lateral view. 



