286 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



Male 5 to 10 mm. long. Tail with thick swollen walls; 24 pairs 

 of papillae, 4 of them postanal (Schneider figures (fig. 349<?) only 3 

 on one side). Two very unequal spicules, one short and thick, the 

 other long, having a length double that of the space occupied by the 

 papillae. 



Female 8 to 20 mm. long. Vulva 1/3 the total length from the 

 posterior end; vagina posteriorly directed. Eggs, smooth, thick- 

 shelled, elliptical. 



Life history. — Unknown. 



Distribution. — Africa (Egypt). 



SCHISTOROPHUS BICUSPIS (Rudolphi, 1819) Railliet, 1916a 



Synonyms. — Spiroptera bicuspis Rudolphi, 1819 ; Dispharagus bi- 

 cuspis (Rudolphi, 1819) Dujardin, 1845; Histiocephalus gracilis 

 Diesing, 1851; Histiocephalus bicuspis (Rudolphi, 1819) Linstow, 

 1878. 



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Fig. 349. — Schistorophus longicobnis. a, Lateral, view and b, front view of 

 head ; c, male tail. Aftbr Schneider, 1866 



Host. — Primary: T ring a helvetica (=Squatarola helvetica); also 

 reported from Grus cinerea and Vanellus melwiw g aster ; secondary: 

 Unknown. 



Location. — Between tunics of gizzard. 



Morphology. — Schistorophus (p. 284) : Body slender at the 2 ex- 

 tremities, especially the anterior, twice as thick in middle portion. 

 Head small, continuous with body and armed with papillae ; to each 

 side, posterior to the head, there is a spine or subulate tooth, directed 

 sometimes horizontally, sometimes posteriorly. (In this species, as in 

 S. bidens, the original description of only 2 processes is explained by 

 the fact that those are the ones seen in profile; the others were evi- 

 dently overlooked). 



Male 4.5 mm. long ; tail forming 2 turns of a spiral ; membranous 

 alae straight. 



Female 9 mm. long; tail ending in a short, flattened, recurved 

 point, anterior to which is the anus. 



Life history. — Unknown. 



Distribution. — Europe (Austria (Vienna Museum) ). 



Railliet (1916) states that this species is probably identical with 

 S. longicornis, p. 285. 



