insect-papilio-2

Insect-papilio-2 - Eggs The female lays her eggs singly on the upper surface of young citrus leaves The egg contains yolk which nourishes the larva

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Eggs . The female lays her eggs singly, on the upper surface of young citrus leaves. The egg contains yolk which nourishes the larva. After a few days the larva escapes from the shell, by biting a hole. The 3mm larva eats the shell as its first meal, this apparently being essential for its successful development. After that, the caterpillar eats the leaves of the citrus tree, using its strong jaws to chew the leaf margins. The larva has thirteen visible body segments of which the first three bear jointed true legs and represent the three future thoracic segments of the adult. The remaining ten segments constitute the abdomen, segments 3, 4, 5, 6 and 10 bearing pairs of larval legs or prolegs which are absent in the adult. The prolegs bear a double row of tiny hooks enabling the insect to hold firmly to the food plant. Pairs of respiratory valves or spiracles occur on the sides of the first thoracic segment and on abdominal segments 1 to 8. The head is equipped with biting jaws which move transversely. Behind the jaws is a
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This note was uploaded on 11/29/2011 for the course BIO 218 taught by Professor Young during the Fall '11 term at BYU.

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