Paras. K:p 



Tail not digitate, subconoid (32 u long), V = 33»k-3h,2% 



X. krugi n. sp. 



17. Four pairs of caudal papillae present — X. campinense Lordello, 1951 

 More than h pairs of caudal papillae present 18 



18. Combined length of spear and spear extension shorter (123. U Ji) 



X. italiae Meyl, 1953 



Combined length of spear and spear extension longer 



(li.2. 0-158.0 }i) 19 



19. Si::c pairs of caudal papillae present, spear apparently con- 

 sisting of two parts — X. elongatun Sch . Stekhoven & Teunis sen, 1938 



Seven pairs of caudal papillae present, spear consisting of 



only one part, as is usual 20 



20. Tail long (77.0-102.0 ji), V = 29.8-31.6^, with a cuticular 

 triangular-shaped structure in the anterior slender part of 



the oesophagus ^X. insigne Loos, 19^9 



Tail short (1^8.0-57.0 ^), V = 39.0-ii2.0^, without such a 

 triangular-shaped structure in the anterior portion of the 

 oesophagus X. pratense Loos, 19U9 



