164 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



Subfamily Spirurinae Railliet, 1915 



Suh family diagnosis.— Spiruridae (p. 163) : Female with 2 uteri 

 and with vulva usually in the middle portion of the body, rarely close 

 to anterior or posterior extremities. Pharynx without cuticular 

 rings or spirals. 



Type-genus. — Sjrirura E. Blanchard. 1849. 



KEY TO GENERA OF SPIRURINAE 



1. Larvae encysted, probably accidentally, in birds ; adults in otber bosts. 



Spirocerca, p. 202. 

 Adults in birds 2. 



2. Cepbalic extremity covered by a circular projecting disk Viguiera, p- 201. 



Cepbalic extremity possessing no such disk but with the usual lip structures 

 3. 



3. Mouth with 4 lips 4. 



Mouth with 2 lips 5. 



4. No lateral alae on body ; sensory papillae postcervical ; postanal papillae 



symmetrical Cyrnea, p. 166. 



Lateral alae usually present ; sensory papillae precervical ; postanal papillae 

 asymmetrical Habronema, p. 172. 



5. Mouth surrounded by Glutinous ring; lips small, integral Spirura, p. 164. 



No chitinous ring around mouth ; lips comparatively large, trilobed. at 



least internally 6. 



6. Sensory papillae cervical (i. e., at level of nerve ring) ; vulva in anterior part 



of body (anterior to end of esophagus) Hadjelia, p. 187. 



Sensory papillae precervical ; vulva in median region of body. 



Hartertia, p. 191. 



Genus SPIRURA E. Blanchard, 1849 



Genetic diagnosis. — Spirurinae (p. 164) : Two lips, sometimes bear- 

 ing papillae, sometimes teeth. Mouth straight and surrounded by 

 a cutinous (chitinous) ring. A buccal cavity and often a pharynx 

 present. Esophagus long and cylindrical. Body of moderate size, 

 attenuated toward the anterior extremity. Lateral alae sometimes 

 present. Male with unequal spicules and with caudal alae which, 

 however, are not continuous across the ventral surface; 4 pairs of 

 preanal papillae. Female with vulva anterior or posterior of middle 

 of body ; two uteri. 



Parasitic in stomach and intestine of mammals and birds. 



Type-species. — Sphmra talpae (Gmelin, 1790) E. Blanchard. 1849. 



KEY TO SPECIES OF SPIRURA 



Lateral alae extending whole length of body; a total of 4 teeth around the 

 mouth on inner surface of lips; male 30 mm. long__ Spirura zschokkei, p. 165. 



No lateral alae described ; a total of 6 teeth around the mouth on inner surface 

 on lips ; male 15 to 20 mm. long Spirura uncinipenis, p. 165. 



This key and the descriptions which follow do not include Spimra 

 talpae (Filaria stmmosa) which has been reported from Buteo vul- 



