322 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



2. Cuticular expansions absent in male, 4 in number in female in lateral, 



dorsal, and ventral fields ; 2 pairs of postanal papillae in male. 



Oxyspirara heteroclita, p. 331. 



Cuticular expansions 2 in number in both sexes, situated laterally; more 



than 2 pairs of postanal papillae 3. 



3. Female 21 mm. long ; left spicule twice as long as right. 



Oxyspirura brevisubulata, p. 325. 

 Female not over 13 mm. long; left spicule 5 times as long as right 4. 



4. Male 8 to 10 mm. long; caudal extremity of male coiled in a single turn; 



2 (?) pairs of preanal papillae Oxyspirura anacanthura, p. 323. 



Male 13 to 15 mm. long; caudal extremity of male coiled twice; 7 pairs of 

 preanal papillae Oxyspirura cephaloptera, p. 322. 



5. Male 8.5 mm., female 8 to 9 mm., long; from Anthochaera carunculata. 



Oxyspirura anthochaerae, p. 324. 



Male more than 8.5 mm. long (may be as little as 8.9 mm. in O. pwr- 



vovum) ; female more than 9 mm. long (may be as little as 9.8 mm. in 



0. parvovum) ; from hosts other than above 6. 



6. Spicules nearly equal in length and of same shape; position in genus ques- 



tionable Oxyspirura brevipenis, p. 332. 



Spicules of unequal length and dissimilar shape 7. 



7. Female 9.8 mm. long ; male with about 28 pairs of preanal papillae ; spicules 



470m and 250m long Oxyspirura siamensis, p. 329. 



Female 11 mm. long or longer ; male with not more than 4 pairs of preanal 

 papillae, or if more numerous (up to 26 pairs), spicules different from 

 above 8. 



8. Female 21 mm. long; male with about 26 pairs of preanal and 1 pair of 



postanal papillae; spicules 180m and 290m long. 



Oxyspirura ophthalmica, p. 328. 



Female less than 21 mm. long (may be as much as 20 mm. in O. parvovum) ; 



preanal papillae apparently absent or less numerous than above ; spicules 



of lengths different from above 9. 



9. Preanal papillae apparently absent; 4 pairs of postanal papillae; left 



spicule 2M times as long as right spicule— Oxyspirura sygmoidea, p. 330. 



Preanal papillae present, the total number being 5 to 8 : not as many as 4 



pairs of postanal papillae ; left spicule either shorter or considerably 



longer than 2^ times the length of right spicule 10. 



10. Mouth surrounded by a 6-lobed chitinous ring; 4 pairs of preanal papillae; 



eggs 50 to 65^ by 40 to 45m Oxyspirura mansoni, p. 325. 



Mouth not surrounded by a 6-lobed chitinous ring ; not more than 3 pairs 

 of preanal papillae; eggs not over 46m by 29m 11- 



11. Male 9.2 mm. long ; 3 pairs of preanal and 2 pairs of postanal papillae ; left 



spicule 3.4 to 4.1 mm. long ; anus of female 390 to 440m from posterior end. 



Oxyspirura parvovum, p. 328. 



Male 13 mm. long; caudal papillae very asymmetrical, a total of 5 preanal 



and 7 postanal papillae ; left spicule 600m long ; anus of female 510m from 



posterior end Oxyspirura tanasijtchuki, p. 330. 



OXYSPIRURA CEPHALOPTERA (Molin, 1860) Stossich, 1897 



Synonyms. — Spiroptera cephaloptera Molin, 1860; Spiroptera 

 momoti brasiliensis Molin, 1860; Spiroptera orioli Molin, 1860; 

 Cheilospirura cephaloptera (Molin, 1860) Diesing, 1861. 



