Question

Choose the type of mouth parts of insects in which the two labella are interconnected by Dutton's membrane.

• A. Piercing and sucking type
• B. Sponging type
• C. Siphoning
• D. Biting and chewing type

Answer 1

The correct option is A Piercing and sucking type

In insects, mouth parts are variously modified to meet the requirement of their feeding habits. Biting and chewing mouth parts of cockroaches, grasshoppers, Dragon flies and beetles are of most primitive type. The larvae of mosquitoes, houseflies, butterflies and honeybees have biting and chewing type mouth parts. Piercing and sucking type - Female mosquitoes, bedbugs, head louse, tsetse fly and Lac insect. Sucking type - male mosquito, Sponging and sucking type - Housefly, Siphoning type - Butterfly. Female mosquitoes suck blood from vertebrate animals. Mouth parts are piercing and sucking type. Labium or lower lip is modified to form proboscis which is elongated. The sensory lobes present at the tip of proboscis are known as labellae and they are connected by Dutton's membrane.