—214— 
DYTISCIDAE. 
Agabus. 
1432. = mutus Sharp. 
GY RINIDAE. 
Gyrinus. 
1526. = 1521. 
HYDROPHILIDAE. 
Hydrophilus. 
9247. ater Fub. 
1588 — 1595 belong to 
Tropisternus Sol. (1587). 
9348. apicipalpis Chev. 
Scydmaenus. 
1840. || = Lecontei Schau. 
Batrisus. 
9254. mendocino Causey. 
9255. zephyrinus Casey.,- 
9256. speculum Casey. 
9257. monticola Casey. 
9258. occiduus Casey. 
1914—1916 belong to 
Rybaxis Saulcy. (1913). 
Bryaxis. 
9259. texana Cusey. 
9260, infinita Casey. 
1926—1927 belong to 
Nisa Casey. (1925). 
Reichenbachia Leach. (1946). 
9261. tumorosa Casey. 
9262. tumidicornis Casey. 
9263. informis Casey. 
Limnebius. 
9249. polita Casey. 
9250. angustula Casey. 
9251. alutacea Causey. 
9252. congener Casey. 
9253. coniciventris Casey. 
SILPHIDAE. 
Silpha. 
1711. ramosa Say. 
aenescens Casey. 
SCYDMAENIDAE. 
Cholerus. 
1853 = 1854. 
PSELAPHIDAE. 
9264. gracilicornis Casey. 
9265. nevadensis Casey. 
9266. fundata Casey. 
9267. franciscana Casey. 
1947—1948 belong to - 
Nisaxis Casey. (1946). 
1953—1955 belong to 
Sonoma Casey. (1952). 
Faronus { Lee. 
1956 belongs to 
Oropus, Casey. (1955). 
Trichonyx } Lee. 
9268, convexus Causey. 
9269, interruptus Causey. 
9270. abbreviatus Casey. 
Trimium. 
Actium Casey. 
