1038 



MR. R. J. ORTLEPP ON THE 



posterioi' to the anus there are two pairs of small papillae close 

 together, the one pair being slightly behind the other pair ; 

 a small distance behind these there is another pair somewhat 

 obliquely placed and also lai^ger ; posterior to the middle of the 

 tail there are two further pairs dividing this part of the tail 

 into thirds. 



The spicules are unequal, the right being slightly stou^ter than 

 the left; both taper to fine points. The right spicule is 180/^ 

 long and 10 /.t broad at its base, while the left spicule is 530 /a 

 long and 9 i.l broad at its base. 



Hosts : Phrynosoma cornutum, P. regale. Stomach. Brazil. 



Types to be deposited in British Museum of Natural History, 

 London. 



Text-figure 18. 





2.00/J. 



Fhysaloptera phrynosoma, sp. ii. 

 A = A^entral view of cephalic extremity. B = Caudal extremity of male. 



Affinities. — Ph. abhreviata has been recorded from this host, 

 but it seems doubtful whether the determination was correct ; 

 this species was present in nearly every one of the specimens of 

 Phrynosomae examined by me, which numbered about a, dozen, 

 and was the only species present ; it is therefore possible that 

 it was this species which was mistaken for Ph. abhreviata. As 

 redescribed by Seurat (1914& and 1917«), Ph. abhreviata is readily 

 distinguished from Ph. phrynosoma by the fact that it has four 

 uteri, whereas the latter has only two. 



The presence of two uteri and a single tooth to each lip allies 

 this species to Ph. gracilis, sp. n., and to Ph. longissima, sp. n. ; 

 it is, however, easily separated from these two species by its 

 much shoi'ter and relatively stouter body. 



