JJJ CONNECTICUT GEOL. A.ND NAT. HIST. SURVEY. [Bill 



Colymbetes Clairville. 

 sculptilis Harris. Coleop. Ind., 229. 



Dytiscus Linnaeus. 

 fasciventris Say. Coleop. I ml.. 231. 

 harrisii Kirby. Ibid., 231. 

 hybridus A.ube. Ibid., 231. (C.C.) 

 verticalis Saw Ibid., 231. 



Hydaticus Leach. 

 piceus LeConte. Coleop. Ind., 232. 

 stagnalis Fabricius. Ibid., 23-'. 



Acilius Leach, 

 fraternus Harris. Coleop. Ind., 234. 

 mediatus Say. Ibid., 233. 

 semisulcatus Aube. Ibid., 233. 



Thermonectes Eschscholtz. 



ornaticollis Aube. Coleop. Ind., 234. (C.C.) 



Graphoderes Eschscholtz. 



fasciatocollis Harris, cinereus. Coleop. Ind., 235. 

 liberus Say. Ibid., 235. (C.C.) 



Family GYRINID^. 



Gyrinus Linnaeus, 

 borealis Aube. Coleop. Ind., 240. 

 limbatus Say. Ibid., 239. 

 lugens LeConte. Ibid., 240. 

 ventralis Kirby. Ibid., 239. 

 sp. 



Dineutes MacLeay. 



assimilis Aube. Coleop. Ind., 242. 



discolor Aube. Ibid., 241. 



emarginatus Say. Ibid., 241. (H.L.J.) 



hornii Roberts. Ibid., 242. 



nigrior Roberts. Trans. Am. Ent. Soc, xxii, 284. 



vittatus German Coleop. Ind., 241. 



