. Goldfish breeds and other aquarium fishes, their care and propagation; a guide to freshwater and marine aquaria, their fauna, flora and management. Aquariums; Goldfish. together, which float about five or six days till the em- brios emerge from the under side and at once take to the water. The larvae keep near the sides of the pools or just below the water level, as they are not deepwater feeders and must fre- quently come to the sur- face to breathe, the oriface of the air tube being thrust out of the water. After a number of molts the pupa is developed, which has the head, thorax, wings an
. Goldfish breeds and other aquarium fishes, their care and propagation; a guide to freshwater and marine aquaria, their fauna, flora and management. Aquariums; Goldfish. together, which float about five or six days till the em- brios emerge from the under side and at once take to the water. The larvae keep near the sides of the pools or just below the water level, as they are not deepwater feeders and must fre- quently come to the sur- face to breathe, the oriface of the air tube being thrust out of the water. After a number of molts the pupa is developed, which has the head, thorax, wings and legs folded in one mass and the abdomen free for navigation. The pupa and nymph stages are passed in a few days and when the period of emergence is reached, the nymph case opens over the back and the perfect insect appears; which, after drying itself, takes wing and disappears. The food of the larvas is vegetal substances and the minute water infusoria. It is only the female insect which has the pro- boscis developed for drawing blood, and both it and the male feed princi- pally by sucking the juices of plants at night, the irritation of the bite being due to a venomous salivary secretion which probably serves to make the blood more liquid. The perfect insect also attacks other insects, cold- blooded vertebrates, small fishes, birds and other warm-blooded animals. The enemies of the larvae and pupae are all the carnivorous insects and their larvae, tadpoles, frogs, salamanders, newts, minnows, sunfishes, perch, sticklebacks, etc.; and those of the adult Dragon-flies are frogs and toads, night-flying birds and bats. It was a theory that the female Mosquito required animal blood to perfect the eggs, but this is scarcely possible con- sidering the enormous numbers of which only an infinitesimal proportion ever taste the blood of animals. Mosquitoes are classified as long and short beaked. The long-beaked genera of North America are Anopheles, Mergarhinus, Psorophora, Toxorhynchi
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectaquariu, bookyear1908
