XIV BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



337. Synhimantus affinis. a, Female genitalia. After Seurat, 1915. b, Head 



end. After Seurat, 1916. 



338. Synhimantus brevicaudata. a, Head end; b, female tail. After Skrjabin, 



1917. 



339. Synhimantus dcnticulata. Head end. After Dujardin, 1845. 



340. Synhimantus laticeps. Male tail. After Seurat, 1916. 



341. Synhimantus laticeps. Head. After Schneider, 1S66. 



342. Synhimantus laticeps. Female genitalia. After Seurat, 1920. 



343. Synhimantus elliptica. Male tail. After Molin, 1861. 



344. Synhimantus hamata. a, Head end. After Linstow, 1879. b, Male tail. 



After Linstow, 1877. 



345. Synhitnantus mvaginata. a and b, Head end ; c, male tail ; d, right and 



e, left spicule; f, female tail. After Gendre, 1913. 



346. Synhimantus recta. Male tail. After Drasche, 1884. 



347. Synhimantus sagittata. a, Head end ; b, male tail. After Schneider, 



1S66. 



348. Synhimantus subrecta. a, Male tail ; b, right spicule ; c, profile view and d, 



ventral view of left spicule ; e, female tail. After Gendre, 1921. 



349. Schistorophus longicornis. a, Lateral view and b, front view of head ; c, 



male tail. After Schneider, 1866. 



350. Schistorophus acanthocephalicus. Head. After Drasche, 1884. 



351. Schistorophus aulieatina. Head end. After Skrjabin, 1916. 



352. Schistorophus bidens. Male tail. After Schneider, 1866. 



353. Schistorophus bidens. a, Head ; b, male tail. After Lepri, 1898. 



354. Histiocephalus laticaudatus. a, Front view and b, lateral view of head ; c, 



male tail. After Drasche, 1884. 



355. Histiocephalus laticaudatus. Male. After Skrjabin, 1916. 



356. Histiocephalus tridens. a, Front view and b, profile view of head ; c, male 



tail ; d, anterior end ; e, posterior end, lateral view ; f, left spicule, ven- 

 tral view ; g, right spicule, lateral view ; h, right spicule, dorsal view ; 

 i, showing notched appearance when spicule removed from body. After 

 Gendre, 1921. 



357. Serticeps vulvoinflata. a, Head ; b, male tail. After Drasche, 1884. 



358. Serticeps vulvoinflata (probably). Labelled Spiroptera mediospiralis but 



apparently incorrectly so. See text for discussion. After Drasche, 

 1884. 



359. Physaloptera acuticauda. a, Terminal part of female genitalia ; b, male 



tail. After Ortlepp, 1922. 



360. Physaloptera alata. a, Head ; b, lip ; c, male tail. After Linstow, 1877. 



361. Physaloptera alata Rudolphi of Ortlepp, 1922. Possibly equivalent to 



P. galinieri Seurat. See text for discussion. After Ortlepp, 1922. 



362. Physaloptera megalostoma. After Creplin, 1829. 



363. Physaloptera crosi. a, Head end; b, male tail; c, female tail. After 



Seurat, 1914. 



364. Physaloptera fusiformis. Male tail. After Linstow, 1902. 



365. Physaloptera gaUnieri. a, Head, lateral view; 6, anterior half of body 



of female, showing ovejector ; c, male tail. After Seurat, 1914. 



366. Physaloptera gemina. Male tail. After Linstow, 1S99. 



367. Physaloptera subalata. a, Lip; b, male tail. After Schneider, 1866. 



368. Physaloptera truncata. a, Lip; b, male tail. After Schneider, 1S66. 



369. Physaloptera brevicauda. Male tail. After Linstow, 1909. 



370. Physaloptera malleus, a, Head ; b, male tail. After Linstow, 1883. 



371. Physaloptera, species. Head end. After Parona, 1885. 



