— 2!4— 



DYTISCIDAE. 



Agabus. 

 1432. = mutus Sharp. 



GYRINIDAE. 



Gyrinus. 

 1526. = 1521. 



Hydrophilus. 



9247. ater Fab. 

 1588 — 1595 belong to 

 Tropisternus Sol. (1587). 

 9348. apicipalpis Chev. 



HYDROPHILIDAE. 



Limnebius. 



9249. polita Casey. 



9250. angustula Casey. 



9251. alntacea Cusey. 



9252. congener Cusey. 



9253. coniciventris Cusey. 



SILPHIDAE. 



Silpha. 



1 7 1 1 . ramosa Say. 



aenescens Casey. 



SCYDMAENIDAE. 



Scydmaenus. 



1840. II = Lecontei Schanff. 



Cholerus. 



1853 = 1854. 



PSELAPHIDAE. 



Batrisus. 



9254. inendocino Casey. 



9255. zephyrinus Casey. 



9256. speculum Casey. 



9257. monticola Casey. 



9258. occiduus Casey. 

 1914—1916 belong to 



Rybaxis Haulcy. (1913). 



Bryaxis. 



9259. texaiia Casey. 



9260. infinila Casey. 



1926 — 1927 bflong to 

 Nisa Casey. 1 1925). 

 Reichenbachia Leach. (1946). 



9261. tuniorosa Casey. 



9262. tumidicornis Casey. 



9263. iiiformis Casey. 



9264. gracilicornis Cnsey. 



9265. nevadensi.s Casey. 



9266. fundata Casey. 



9267. franciscana Casey. 



1947 — 1948 belong to 

 Nisaxis Casey. (1946). 



1953— 1955 belong to 

 Sonoma Casey. (1952). 

 FaroiMs % Lee. 



1956 belongs to 

 Oropus, Casey. (1955). 



Tiicluniyx i Lee. 



9268. convexus Cisey. 



9269. interruptus ('asiy. 



9270. ahbreviatus Casey. 

 Trimium. 



Adium Casey. 



