NO. 9 cuckler: nematode parasites 153 



average 2.98 mm. in length by 0.21 mm. in width. No lateral alae in 

 female; thickened cuticular regions along posterior end of male may 

 indicate lateral alae; wide caudal alae in male. Cephalic region evi- 

 dent; three simple lips each with two papillae; ventrolateral lips each 

 with an amphid. Esophagus typical, about one third body length in 

 mature male, and about one fourth body length in immature female. 

 Excretory pore slightly prebulbar in male, and slightly postbulbar in 

 irnmature female. 



Male: Single acicular spicule, 0.437 mm. long. Straight accessory 

 piece 0.048 mm. wide by 0.056 mm. long. Three pairs genital papillae. 

 One precloacal pair of sessile papillae; one pair of adcloacal peduncu- 

 lated papillae; one pair of stout, pedunculated caudal papillae. Caudal 

 alae wide, extend posteriorly to caudal papillae. 



Female: Immature specimens only available. Vulva slightly pos- 

 terior to mid-body. Tail 0.49 mm. in length. 



This species is named after the genus of its host, Conolophus. 



Affinities : This species may be distinguished from A. alaeuris by the 

 absence of conspicuous lateral alae in the male, the relatively longer 

 female tail, the character and disposition of the genital papillae, and the 

 length of the spicule. 



It differs from A. iguanae in the absence of toothlike processes on 

 the inner edges of the lips, the relative length of the female tail, the 

 unstriated caudal alae, the number and disposition of the genital papillae, 

 and the length of the spicule. 



Its differences from A. hirsutus are the size, the character and num- 

 ber of the genital papillae, the extent of the male tail beyond the caudal 

 alae, and the much shorter spicule. 



The distinguishing differences between this species and A. conspicua 

 are the absence of conspicuous lateral alae, the absence of the spike on 

 the male tail, the number and position of the genital papillae, and the 

 length of the spicule. 



It differs from A. galapagensis in the number of cephalic papillae, 

 the absence of toothlike processes arising from the anterior end of the 

 esophagus, the character of the genital papillae, the shape of the tail 

 of the male and the shape of the caudal alae, the slight difference in 

 the size of the spicule, and the size and shape of the accessory piece. 



This species may be distinguished from A. longispicula on the basis 

 of the form of the lips and the number of cephalic papillae, the length 

 and shape of the tail of the male, the great difference in the length of 



