NO. 2131. NEMATODE PARAf^ITESi OF RODENT,^— HALL. 213 



Bursa margin not scalloped. Of the sessile caudal papillae there are 1 un- 

 paired preanal, 1 pair of preanal, and 5 pairs of postanal. 



riiysaloptcra ahhreviaia, p. 214. 



PHYSALOPTERA SPIRULA Hemprich and Ehrenberg, 1828. 



Specific diagnosis. — Physaloptera (p. 212) : Head coiitiniious with 

 body. Mouth papillate. 



Male 6 mm. long. Caudal extremity of the body provided with 

 closed bursal alae. 



Female unknown. 



Hosts. — Pr'ocavia syriaca {Tlyrax syriacus), {?) Procama capensis 

 {Hyrax capensis). 



Location. — Large iiitestme. 



Localities. — Syria and Arabia. 



This species has been left in the genus Physaloptera because it was 

 put in that genus and there is no evidence to show where it belongs. 

 At the same time, the head structure, the size of the male, and the 

 site of infestation suggest that this is not a species of Physaloptera 

 within the present limits of the genus. Molin (18G0c) has listed this 

 species, apparently erroneously from II y rax capensis {=^Procaoia 

 capensis). 



PHYSALOPTERA CITILLI (Rudolphi, 1819) Hall, 1916. 



Synonym. — Spiroptera citilli Eudolphi, 1819. 



Specif c diagnosis. — Physaloptera (p. 212) : Body curved. Anterior 

 extremity very slightly attenuated. Head rounded, continuous with 

 the body, and with the cuticle inflated. Mouth with two large lips. 

 Six head papillae, of which there are two conical papillae situated 

 on each side near the angle of contact of the two lips, and one spheri- 

 cal papilla at the base of each lip. Cuticle densely striate trans- 

 versely. 



Male unknown. 



Female 7 to 13 mm. long and 400 ju, thick. Posterior extremity 

 obtuse. Vulva in anterior portion of body. 



Host. — Citellus citellus {Arctomys citillus). 



Location. — Stomach. 



Locality. — Not given. 



Molin (1860'ft) has intimated that this species belongs in the genus 

 Physaloptera, and, inasmuch as the evidence favors this view and 

 the genus Spiroptera., to which Eudolphi assigned it, is without 

 standing, it has accordingly been transferred to Physaloptera. 



PHYSALOPTERA MURIS-BRAZILIENSIS Diesing, 1861. 



Synonymj. — Spiroptera hildbiata Molin, 1860a, not Spiroptera hila- 

 hiata (Creplin, 1829) Dujardin, 1845. 



Specific diagnosis. — Physaloptera (p. 212) : Body attenuated ante- 

 riorly and enlarged posteriorly. There are two large lips, each with 



