268 



BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



Morphology.— Streptocara (p. 264) : Head (fig. 330 a) with 2 

 conical salient lips, posterior to which is a finely denticulated col- 

 larette. Cervical papillae 33/* from head end, with 5 to 9 points of 

 different sizes. 



Male 3 to 5.5 mm. long by 200/* wide. Esophagus 1.4 mm. long. 

 Four pairs of preanal, 6 pairs of postanal papillae. Spicules un- 

 equal, the longer 314 to 396/*, the shorter 81 to 88/* long. 



Female 5.6 to 15.1 mm. long by 150 to 360/* wide. Buccal cavity 

 22/*, esophagus 2 mm. long. Tail end (fig. 330 o) rounded, the anus 

 25/* from end. Vulva (fig. 330 c) just slightly posterior to middle 



*<a& 



Figs. 330-331. — 330, Streptocara crassicauda. a, Head; b, tail op female; 

 c, vulva. After Skrjabin, 1916. 331, Streptocara crassicadda chara- 

 drii. a, Head ; b, cervical papilla. After Skrjabin, 1916 



of body, according to Skrjabin. Eggs 26 to 37/* long by 17 to 22/* 

 wide. 



Life history. — Unknown; see S. pectinifera, p. 266. 



Distribution. — Europe and Asia (Russian Turkestan). 



Skrjabin proposes the variety name anseris for this form to dis- 

 tinguish it from S. crassicauda charadrii, but this is not allowable 

 under the rules of nomenclature. He uses the form S. c. anseri but 

 does not make the combination with anseris. 



STREPTOCARA CRASSICAUDA CHARADRII Skrjabin. 1916b 



Host. — Primary: Vanellus cristatus; secondary: Unknown, see 

 S. pectinifera, p. 266. 



Location. — Under cuticle of gizzard. 



Morphology.— Streptocara (p. 264) : The differences between this 

 and Streptocara crassicauda (Creplin, 1829) are (1) different host 

 order, this being in the Charadriiformes and the original species in 

 the Anseriformes and (2) the cephalic ornamentation: Between the 



