NEMATODE PARASITES OF BIRDS 273 



2. Description incomplete; female 20 nun. long; from Falco subbuteo. 



Synhimantus denticulata, p. 27.~. 

 Female usually less than 20 mm. long; from hosts other than above :;. 



3. Vulva anterior to middle of body, dividing body in ratio of 90:103: 



spicules 156m and 372m long Synhimantus affinis, p. 273. 



Vulva posterior to middle of body (except in 8. laticeps where perhaps 

 just anterior to middle I : spicules, if male known, differ in length from 

 above (except possibly in /•>'. sagittata; lengths not given) -1. 



4. Only female known, 13 to 15 mm. long; cordons extend posteriorly for % 



or more of the length of the muscular esophagus, a distance of S4u> from 

 the head end; vulva 510/u. anus 170/* from posterior end; from J'clc- 



canus species Synhimantus raillieti, p. 283. 



Both male and female known; female not agreeing in all respects with 

 above; from hosts other than PcJccanus 5. 



5. Male with 6 to 7 pairs of caudal papillae 0. 



Male with 8 to 10 pairs of caudal papillae 7. 



6. Cloacal aperture of male only G3m from tail end ; vulva of female not more 



than 700m from tail end Synhimantus brevicaudata, p. 274 



Cloacal aperture of male much more than G3m from tail end ; vulva described 

 as posterior to middle of body Synhimantus elliptica, p. 277. 



7. Vulva near posterior end of body js. 



Vulva not far posterior to middle of body 10. 



8. Male with 10 pairs of caudal papillae; G pairs postanal. 



Synhimantus recta, p. 280. 

 Male with 9 pairs of caudal papillae; 5 pairs postanal 9. 



9. Male 8.5 to 10.5 mm. long; female 12.2 to 12.8 mm. long; cordons become 



very broad in the second half of their length and in their recurrent 



portions Synhimantus invaginata, p. 279. 



Male 7 mm. long; female 9 mm. long; cordons narrow throughout entire 

 course Synhimantus sagittata, p. 281. 



10. Male with 8 pairs of caudal papillae and in addition 4 small papillae in a 



transverse row near the posterior extremity ; spicules 19(>m and 720/x long; 



eggs 30m by 19m Synhimantus hamata, p. 27S. 



Male with 9 pairs of caudal papillae ; spicule lengths different from above ; 

 eggs at least 37m long and 22m wide 11. 



11. Male G.4 to 6.8 mm. long; female 10.5 mm. long; spicules 200 to 210m and 



950 to 960m long; in Asturinula monogrammha. 



Synhimantus subrecta, p. 282. 



Male 7.2 to 10 mm. long; female 11 to 21 mm. long; spicules 17(>m and 590/u 



long; in hosts other than above Synhimantus laticeps, p. 27G. 



SYNHIMANTUS AFFINIS (Scurat, 1916) Scurat, 1919 



Synony7iiH. — Acuaria affinis Seurat, 1916; FUaria laticeps in part 

 of Mueller, 1897; Acuaria laticeps, female of Seurat, 1915. 



Hosts. — Primary: Strix flam/mea (=z7 1 yto alba); secondary: Un- 

 known. 



Location. — Esophagus. 



Morphology. — Synhimantus (p. 272) : Body robust, elongate. 

 Cuticula thick, transversely striated. Buccal lips hear truncate tooth 

 and a pair of projecting papillae. Cordons (fig. 3375), longer than 

 in S. laticeps, descend to level of excretory pore in female, then curve 



