Beginners' zoology . lt fiea, all shown enlarged. Itsmandibles, b, b, are used for piercing. To kill fleas lather dog or cat completelyand let lather remain on five minutes before washing. Eggs are laid and firststages passed in the ground. How does the ?uosquito lay its eggs in the water without drowning (176) ? Why are the eggs always laid in still water ? Which part of the larva (wiggletail) is held to the surface in breathing ? What part of the pupa (called tumbler, or bull head) is held to the surface in breathing ? Give differences in larva and pupa. Where does pupa change to perfect ins
Beginners' zoology . lt fiea, all shown enlarged. Itsmandibles, b, b, are used for piercing. To kill fleas lather dog or cat completelyand let lather remain on five minutes before washing. Eggs are laid and firststages passed in the ground. How does the ?uosquito lay its eggs in the water without drowning (176) ? Why are the eggs always laid in still water ? Which part of the larva (wiggletail) is held to the surface in breathing ? What part of the pupa (called tumbler, or bull head) is held to the surface in breathing ? Give differences in larva and pupa. Where does pupa change to perfect insect ? Describe mouth parts of male mosquito (at left) and female (at right). Only female mosquitoes suck blood. Males suck juice of plants. Malarial mosquito alights with hind end of body raised at an angle. Why does killing fish and frogs increase mosquitoes? 1 oz. of kerosene for 15 ft.,of surface of water, renewed monthly, prevents mosquitoes. What is the use to the squash bug (Fig. 184) of having so bad an odour?. 12 5 ^ 5 Fig. 177. Illustrated Study of Dragon Fly. — 3 shows dragon fly laying itseggs in water while poised on wing. Describe the larval form (water tiger). Theextensible tongs are the maxillag enlarged. The pupa (i) is active and lives inwater. Where does transformation to adult take place (5) ? Why are eyes ofadult large ? its legs small ? Compare front and hind wings. Do the eyes touch each other ? Why is a long abdomen useful in flight ?Why would long feelers be useless ? What is the time of greatest danger in thedevelopment of the dragon fly ? What other appropriate name has this insect ?Why should we never kill a dragon fly ? 94 Illustrated Studies
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1921
