SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL, III 



Fig. i6. — Species of Ludius. 



a, Ludius glmicus (Germar) : ninth abdominal segment, dorsal view, h, e, 

 L. semivittatns (Say) (?): b, first abdominal segment, ventral view (semi- 

 diagrammatic, the larva being much shrunken) ; e, left urogomphus, lateral 

 view, c, L. cruciatus festiviis (LeConte) (?): left urogomphus, lateral view. 

 d, j, L. sexualis Brown ( ?) : d, left urogomphus, lateral view; j, ninth abdomi- 

 nal segment, dorsal view. 



