Bull. U. S. F, C. 1899. (To face page 492.1 



Plate IV. 



26 



27 











28 





-.a 





30 





■ 'I t 



31 





2C. vl.srnc/s- /(;j.s7'»*(7 sp. Tiov., contiiuR-ii. ('[iittT ii]>. - ;itii), 

 21. Veiitml view of tn'iul f)f male. ■ lUHl. 

 28, Lateral view of tail of male. ■, Go. 



'J'.». Ascdris fvriirva Rudolphi, fmiii Xi/ihiits iflafh'us. Ventral 

 view of head, v 300. 



30. Upper lip <it sjinu". < 300. 



31. Nearly ventral view of tail of female. ■ 10. 



32. Tail of male, lateral view. ■ Ci't. 



