1. Entomology 462 Insect Morphology
David J. Shetlar, Ph.D.
The “BugDoc”
The Ohio State University,
OARDC & OSU Extension
Columbus, OH
© October, 2004, D.J. Shetlar, all rights reserved

2. External Morphology (grasshopper)
Antenna
Compound eye
Wing
Head
Thorax
Abdomen

3. Lubber Grasshopper

4. Lubber Grasshopper

5. Lubber Grasshopper Head
antenna
compound eye
ocelli
frons
mandible
clypeus
maxilla
labium
labrum

6. Lubber Grasshopper Thorax
pronotum
mesopleuron
spiracle
metapleuron
coxa
femur
tibia
trochanter
tarsus

7. Lubber Grasshopper Abdomen
abdominal tergites
cercus
spiracles
abdominal sternites

8. Insect Digestive System
Generalized Diagram (typical of grasshopper)

9. Insect Digestive System
Caterpillar Digestive System
Milkweed Bug Digestive System

10. Insect Excretory System:
Malpighian Tubules

11. Insect Respiratory System
Spiracles, Tracheae, Tracheal Trunks & Air Sacs, Tracheoles

12. Insect Respiratory System
Cana lily skipper (a butterfly) larvae have an almost completely transparent exoskeleton, thereby allowing a good view of the tracheal system.

13. Insect Respiratory System

14. Insect Nervous System

15. Insect Nervous System

16. Insect Muscular System

17. Insect Exoskeleton

18. Insect Reproductive System