XII BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



274. Gongylonema ingluvicola. a, Head ; b, male tail. After Ransom, 1904. 



275. Spiroptera penihamata. Male tail. After Drasche, 1884. 



270. Spiroptera turdi. Head, a, Front; b, lateral view. After Drasche, 1884. 



277. Desmidocerca aerophila. a, Head ; b, male : c, male tail ; d, female tail. 



After Skrjabin, 1910. 



278. Acuaria ptilopachydis. a, Anterior end; 6, female tail. After Gendre, 



1920. 



279. Acuaria qnadriloba. Head, front view. After Schneider, 1800. 



280. Acuaria tarentolae. Anterior and posterior ends of third stage larva. 



After Seurat, 1910. 



281. Acuaria anthnris. Male tail, a, Cross section; b, ventral view. After 



Schneider, 1800. 



282. Acuaria anthnris. a, Male tail X about 50 ; b, female tail end. After 



Linstow, 1873. 



283. Acuaria anthnris. Ovejector. After Seurat, 1915. 



284. Acuaria cordata. a, Head end ; b, lateral and c, ventral view of male tail. 



After Mueller, 1897. 



285. Acuaria depressa. Male tail. After Schneider, 1800. 



280. Acuaria gracilis, a and b, Anterior end ; c, left and d, right spicule ; e, 

 male tail; f, female tail. After Gendre, 1912. 



287. Acuaria ornata. a, Male tail; b, left spicule; c, head end; d, right 



spicule ; e, cordons of the lateral and f, of the submedian fields. After 

 Gendre, 1912. 



288. Acuaria papillifera. Head and tail ends of male. After Linstow, 1878. 



289. Acuaria subitla. a and b, Head end ; c, male tail ; d, right and e, left 



spicule. After Gendre, 1913. 



290. Cheilospirura hamulosa. a, Cordon ; b, head, lateral view ; c, male tail. 



After Drasche, 1883. 



291. Cheilospirura grureli. a, Anterior end; b, head; c, cordon; d, female 



tail. After Gendre, 1912. e, Right and f, left spicule; g, male tail. 

 After Gendre, 1913. 



292. Cheilospimra rotundata. Male tail. After Linstow, 1907. 



293. Cheilospirura spinosa. a, Anterior end ; b, part of cordon ; c, vulva ; d, 



female tail ; c, spicule. Original. 



294. Cheilospirura spinosa. Male tail. Original. 



295. Chevreuxia revoluta. Anterior end. After Seurat, 1918. 



296. Cosmocephalus diesingi. a, Anterior and middle parts of worm, showing 



position of vulva; b, anterior end; c, female tail. After Molin, 1801. 



297. Cosmocephalus aduncus. a, Head end; b, male tail. After Stossich, 



1S92. 



298. Cosmocephalus obvelatus. a, Dorso-ventral view and b, lateral view of an- 



terior end ; c, female tail, ventral view. After Seurat, 1919. 



299. Cosmocephalus obrelatus. Male tail. After Linstow, 1877. 



300. Dispharynx nasuta. Head and tail of male. After Pujardin, 1845. 



301. Dispharynx spiralis. Male. After Piana, 1S97. 



302. Dispharynx spiralis. Female. After Piana, 1897. 



303. Dispharynx spiralis, a, Head end. After Seurat, 1910. b, Ovejector. 



After Seurat, 1919. 



304. Dispharynx laplantei. Ovejector. After Seurat, 1919. 



305. Dispharynx magnilabiata. Male tail. After Drasche, 1884. 



300. Dispharynx noctuae. a, A r ulva ; b, anterior end, dorsal view; c, female; 

 d, anterior end, lateral view ; e, ovejector and vulva. After Seurat, 

 1913. 



