Entomology Study Guide
1. Identify the insect by picture including Order
and Common Name
2. identify the type of mouthpart
3. Identify the type of metamorphosis of the
insect
Insect Anatomy
• Have a hard
exoskeleton that
protects internal
organs
– Must shed it to grow
Mouthparts
• Determines the order of the insect
• Determines the damage it will inflict on a
plant
• 4 Most Common Types:
– 1. Piercing- sucking
– 2. Chewing
– 3. Siphoning
– 4. Sponging
Pierce and Suck Mouth
• form a tube which is inserted into food source
• food may be plant, insect,
Chewing Mouth
• Have large mandibles (jaws) on each side that
move from side to side
– Often have noticeable, finger-like palps on each
side of the mouth
Siphoning Mouth
• Long, straw like structure that sucks nectar
from flowers
Sponging Mouth
• Release
digestive
enzymes
from mouth
which
liquefies the
food source
and they suck
it up through
the sponge
like
mouthpart
Metamorphosis
• Metamorphosis= how the insect
grows/changes form
-Ametabolous= no metamorphosis, look the same
as larva and adults, just get bigger
Metamorphosis
• Incomplete or Hemimetabolous
– larva and adult look similar, but they may grow
wings, change shape, change color as they get
larger
Metamorphosis
• Complete or Holometabolous– The larva looks completely different from the
adult form