NEMATODE PARASITES OF BIRDS 



265 



Male with 2 membranous caudal alae; 4 pairs of preanal, 5 to G 

 pairs of postanal papillae, all pedunculate. Two very unequal 

 spicules, the longer ending in a recurved barb. 



Female with vulva usually a little behind the middle of body, 

 occasionally more anterior or more posterior. Eggs embryonated 

 when deposited. 



Parasitic under the cuticle of gizzard of birds. 



Type-species. — Streptocara pectinifera (Neumann, 1900) Skrjabin, 

 19165. 



Fig. 327. — Seuratia shipleyi. a and h, Proximal region of ovejector; c, distal 



REGION OF OVEJECTOR. AFTER SEURAT, 1916 

 KEY TO SFECIES OF STREPTOCARA 



1. Cervical papillae with 3 points 2. 



Cervical papillae with 5 or more points 6. 



2. Female not over 10 mm. long 3. 



Female 16 mm. or longer 5. 



3. Cervical papillae over 4(XV from anterior extremity ; eggs 27 > long. 



Streptocara triaenucha, p. 271. 



Cervical papillae not more than 140> from anterior extremity ; eggs 39/* 



long 4. 



4. Vulva anterior to middle of body (1/2.6 of body length) ; 5 pairs of postanal 



papillae; spicules 140/u. and 600> long Streptocara cirrohamata, p. -V>C>. 



Vulva in posterior region of body (500ju from posterior end) ; 3 pairs of 

 postanal papillae; spicules 68^ and 237/n long__ Streptocara decora, p. 269. 



5. Male 5.5 mm. long; 6 pairs of postanal papillae; spicules 110> and 400/i 



long; from Colymbus arcticus and La run ridibundus. 



Streptocara tridentata, p. 271. 

 Insufficiently described. From Fulmaris glacialis. 



Streptocara stellae-polaris, p. L'TO. 



6. Male 11 mm. long; female said to be smaller than male; spicules 250^ and 



490/* long Streptocara recta, p. lm;'.>. 



Male not over 5.5 mm. long; female 6 to 15 mm. long; spicules not over 88m 

 and 396/a long 7. 



7. Five pairs of postanal papillae; long spicule measures 12«>-">m ; in (lalliist gallus. 



Streptocara pectinifera, p. 266. 



Six pairs of postanal papillae; long spicule measures 314 to 396,u; in other 



hosts than above 8. 



8. Marked transverse cuticular striations between the collar and cervical papil 



lae, and a swelling in the region of the latter. In Charadriiformes. 



Streptocara crassicauda charadrii, p. L'in 

 Marked transverse striations and swelling absent In Antcriformes. 



Streptocara crassicauda, p. L'<;7. 



