Bull. U. S. B. F., 1912. 
Plate XXXII. 
5 6 
Fig. 1.—Placopharynx duquesnii. Cherokee, Iowa (S. E. Meek). 
Fig. 2.—Acanthorhodeus tsenianalis. Shanghai (Swinhoe). The wavy apical radii are not well shown. 
Fig. 3.—Algansea sallaei. Guanajuato, Mexico (A. Dug£s). 
Fig. 4.—Chela paralaubuca. British Museum. 
Fig. 5.—Chondrostoma meigii. San Domingo de Silos, Burgos, Spain (Gonzales). 
Fig. 6.—Nocotnis kentuckiensis. Stone River, Tennessee. 
