. The complete aquarium book; the care and breeding of goldfish and tropical fishes. Aquariums; Goldfish. Figs. 81 and 82. Whirligig Beetle and Larva (Enlarged three times) which is not so well known, is also predaceous. This little beetle when held in the hand emits a faint but pleasant Fig. 83. Water Boatman (Slightly enlarged) Water Boatmen and Back Swimmers (Corixidx and Notonectida) are found everywhere in still or slow-moving water. There is a wide variation of opinion as to the predaceous characteristics of these insects. This is because fish breeders ordinarily class them all as
. The complete aquarium book; the care and breeding of goldfish and tropical fishes. Aquariums; Goldfish. Figs. 81 and 82. Whirligig Beetle and Larva (Enlarged three times) which is not so well known, is also predaceous. This little beetle when held in the hand emits a faint but pleasant Fig. 83. Water Boatman (Slightly enlarged) Water Boatmen and Back Swimmers (Corixidx and Notonectida) are found everywhere in still or slow-moving water. There is a wide variation of opinion as to the predaceous characteristics of these insects. This is because fish breeders ordinarily class them all as "boatmen," a very natural mistake owing to their general resemblance. The facts are that Back Swimmers (fortunately much the fewer in numbers) are carniv- orous, predaceous and capable of inflicting a severe bite when being handled. They are fish enemies. Water Boatmen are harmless scav- engers. In swimming they use their longest pair of legs like oars, which accounts for their Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Innes, William T. (William Thornton), 1874-1969. New York, Halcyon house
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