220 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



Fig. 14. — Species of Ludius. 



a, b, Ludius appressus (Randall) : a, left urogomphus, lateral view; b, uro- 

 gomphi, _ dorsal view, c, L. bipiistiilatus (Linnaeus) : urogomphi, dorsal view. 

 d, L. triundidatus (Randall) : mediotergite of fifth abdominal segment, lateral 

 view, e, L. aeripennis destructor Brown : mediotergite of fourth abdominal seg- 

 ment, lateral view. /, L. sjaelandicus (Miiller) : eighth abdominal segment, 

 lateral view, g, L. kendalli (Kirby) : urogomphi, dorsal view, h, L. cinctus 

 (PaykuU) : left maxilla, ventral view, i, L. nttidulus (LeConte) : ninth 

 abdominal segment, dorsal view. ;, L. rotiindicollis (Say) ("Western species"), 

 ninth abdominal segment, dorsal view. 



