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308 COLLEGE ENTOMOLOGY<br />

External<br />

Size - minute, 0.3-80 mm.<br />

Shape - variable, globular to linear.<br />

Exoskeleton - smooth, naked, thin or<br />

tough; many with glands for secreting<br />

waxes or scale-like coverings.<br />

ColO1's - dull and cryptic; dark green,<br />

reddish or brilliant in tropics.<br />

Head - hypognathous, distinct, fitting<br />

closely into prothorax, not generally constricted<br />

behind to form neck; front venter<br />

touching fore COX

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