202 



BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



Male 5.2 to 6.75 mm. long by 125[/. wide. In the specimens 5.2 mm. 

 long, the buccal cavity measured 32//,, muscular esophagus 370[jt,, total 

 esophagus 2.7 mm. long. Tail strongly rolled in spiral. Caudal alae 

 (fig. 273a) wide, attaining length of 580/*. Left ala longer and 

 especially wider, than right; a furrow divides the alae throughout 

 their whole length, at about the middle of their width. Left ala, in 

 addition, is marked with fine transverse striations in its inner half. 

 Nine preanal papillae (Seurat says 9 pairs but figures them single) 

 on the left side, 7 on the right, moderately pedunculated; an un- 

 paired papilla on the anterior edge of cloacal aperture (Seurat notes 

 that it is not shown in figure) and 2 pairs of postanal papillae. 

 Spicules very unequal, 930/* and 192[* long. 



Fig. 273. — Viguiera euryoptera. 



a, Male tail ; b, ovejector. After Seurat, 

 1913 



Female 9 to 10 mm. long by 290/* wide. Total length of esophagus 

 is 1/3 body length; muscular esophagus 780/* long. Tail 120/* long. 

 Vulva situated immediately anterior to anus, a distance of 52f* from 

 it, not salient. Vagina (fig. 2735) short, with rounded openings 

 into ovejector, which is a cylindrical tube about 2 mm. long, com- 

 posed of vestibule and sphincter which together measure 600[*. and 

 a trompe measuring 1.2 mm. long. Eggs 32/* long by 18[* wide, with 

 thick shells, embryonated when oviposited. 



Life history. — Unknown. 



Distribution. — Europe (Austria (Museum, Vienna)) and Africa 

 (Mascara and Setif). 



Seurat has stated that Spiroptera turdi (p. 206) should probably 

 be transferred to this srenus. 



Genus SPIROCERCA Railliet and Henry, 1911b 



Generic diagnosis. — Spirurinae (p. 164) : Mouth hexagonal, with 6 

 teeth projecting into its cavity; a short funnel-shaped vestibule fol- 



