172 Journal New York Entomological Society. ["^'°I- ^X- 



One specimen, Bosque Co., Texas; Belfrage. Easily known by 

 the more ventricose form and peculiar sternal impressions ; the pro- 

 thoracic side pieces are sparsely punctured." 



In order to make this paper complete I have copied here Leconte's 

 description of this species. 



Type. In the Museum of Comparative Zoology, Cambridge, Mass. 



PELTODYTES Regimbart. 



Peltodytes Regimbart, M. Ann. Soc. Ent. Fr. (5), VITI, 1878, p. 450. 

 Cnemidotus Erichson (non Illiger), Gen. Dyt., 1832, p. 48. 

 Type. — Cnemidotus cccsiis Duft. 



Terminal segment of palpi conical, longer than the preceding. 

 Palpi with numerous sensory pits. Submentum trilobed, the medium 

 lobe not emarginate. Pronotum truncate, strongly narrowed in front, 

 widest at base, convex above. Elytra with nine to ten rows of punc- 

 tures, the punctures of the apical half usually much more irregular 

 and more numerous. Inervals with few scattered punctures. Poste- 

 rior coxae concealing all but the last segment of the abdomen. Hind 

 tarsi somewhat shorter than the tibia; first tarsal joint longer than 

 the fourth. Claws small. 



Cnemidotus Illiger (1802) has been used for this genus but as 

 has been pointed out by Regimbart (1878) it is an absolute synonym 

 of Haliplus Latreille. Illiger (1802) in his genus Cnemidotus in- 

 cluded only species which are congeneric with Haliplus Latreille 

 (1802). Erichson (Gen. Dyt., 1832, p. 48) under Gen. 16 Cnemidotus 

 Illiger cites Dytiscus ccrsus Duft. Dytiscus carsus Duft. is not con- 

 generic with the species included in Cnemidotus by Illiger and Erich- 

 son's description of the genus does not apply to Cnemidotus in the 

 sense of Illiger (= Haliplus Latreille). 



Regimbart (Ann. Soc. Ent. Fr., 1878 p. 457) points out that Cnem- 

 idotus Erichson is not synonymous with Cnemidotus Illiger (=^ Hali- 

 plus Latreille) and proposes the name Peltodytes for Cnemidotus 

 Erichson but failed to mention the included species. As Erichson 

 mentioned only one species in his Cnemidotus namely Dytiscus casus 

 Duft., this species must stand as the type of the genus Peltodytes 

 Regimbart. 



This genus contains twenty species, nine from Xorth America, 

 eight from Europe, two from the East Indies and one from Central 

 Africa. 



