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NATURAL HISTORY, TORONTO REGION

Dytiscidae (Diving-beetles)—(Continued). Hydroporus dichrous, Melsh.

"   modestus, Aube. Ilybius biguttulus, Germ. Coptotomus interrogatus, Fab. Agabus seriatus, Say.

,,

punctulatus, Aube.

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obsoletus, Lee.

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erythropterus, Say.

Rhantus binotatus, Harr. Colymbetes sculptilis, Harr. Hydaticus piceus, Lee.

Dytiscus fasciventris, Say. hybridus, Aube.

verticalis, Say.

   "   harrisii, Kirby. Acilius semisulcatus, Aube. Thermonectes basilaris, Harr. Graphoderes fascicollis, Harr. Cybister fimbriolatus, Say.

Gyrinidae (Whirligig-beetles).

Gyrinus dichrous, Lee.

   "   ventralis, Kirby. Dineutes assimilis, Aube.

Hydrophilidae (Waver-scavenger beetles). Helophorus lacustris, Lee.

   "   angustulus, Maim.

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lineatus, Say.

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tuberculatus, Gyll.

Hydrochus excavatus, Lee. 318


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