310 Miscellaneous. 



Hydradephaga. 



1. Fam. DytiscidcB, Leach. 



1. Sub-fam. Dytiscince. 



1. Dytiscus, Linn. 



D. fasciventris, Say. (Carolinus, Aube.) Rare, ditches on the La- 

 chine Railway, April. 



2. Acilius, Leach. 



A. fraternus, Harris. Extremely numerous in small pools on the 

 sandy common between St. Catherine and Sherbrooke Streets 



May. 



2. Sub-fam. Colymbetinee. 



3. Colymbetes, Clairville. 



C. triseriatus, Kirby. One specimen taken in a pond near Mile- 

 end toll-bar, May 7th, 1857. 



C. binotatus, Harris. In a pond on the common at Laprairie, 

 May 13th, 1857. 



4. Ilybius, Erichs. 



I. biguttulus, Germ. In a small pool in a field at the head of St, 

 Denis Street, August 27, 1857. 



5. Agabus, Leach. 



A. striatus? Say. In ponds, June. 



A. (not named.) In a running stream on the common between St. 

 Catherine and Sherbrooke Streets, May 7th, 1857. 



6. Laccophilus, Leach. 



L. maculosus, Say. Abundant in streams and ponds, Montreal and 

 St. Hilaire. 



3. Sub-fam. Hydroporince. 



(See Proc. Acad. Nat. Sci. Phila., Vol. VII., p. 290.) 



7. Hydroporus, Clairville. 



H. similis, Kirby. Numerous in a pond at the head of St. Denis 



Street, April 1857. 

 H. modestus, Aube. In small ponds between St. Catherine and 



Sherbrooke Streets West, beginning of May. 

 H. nanus, Aube. Very abundant in ponds between St. Catherine 



and Sherbrooke Streets West, and at St. Hilaire, May. 



Sub-fam. Haliplince. 



8. Haliplus, Lair. 



H. immaculaticollis, Harris. Stream on Logan 7 3 farm, October. 



9. Cnemidotus, Illig. 



C. duodecim-punctatus, Say. Very abundant in a stream on 

 Logan's farm, October. 



2. Fam. Gyrinidce, Leach. 

 1. G3 r rinus, Geoff. 



G. lateralis, Aube. Pools on the common between St. Catherine 



and Sherbrooke Streets West, May. 

 G. (not determined.) Pools on the common between St. Catherine 



and Sherbrooke Streets West, May. 

 G. (not named.) Pools and streams, May to October. 



