| Long | folded on the back, tarsus | (_Gryllidæ_) | | three-jointed | ============================================================================= B. Species or Genera ============================================================================ CHARACTERS OF SPECIES | COMMON NAME | GROUPS -------------------------------------+----------------------+--------------- Large size, brown color | American cockroach | Small size, pale brown | "Croton bug" | Cockroaches Dark color, often wingless | Oriental cockroach | -------------------------------------+----------------------+--------------- Body long, anterior portion slender | Mantis or rear horse | Mantis -------------------------------------+----------------------+--------------- Long body, long legs, no wings | Walking stick | Walking sticks -------------------------------------+----------------------+--------------- Very large size, wings very small | Lubber grasshopper | Small to medium size, legs marked | Red-legged | with red | grasshopper | Short-horned Large size, greenish brown color | Differential locust | grasshoppers Medium to large size, sand color | Carolina locusts | (gray) | | -------------------------------------+----------------------+--------------- Rather large, green, wings large | Angle-wing katydid | and angled | | Long-horned Small to rather large, usually green | Meadow grasshopper | grasshoppers Wingless, brown color | Cricket grasshopper | -------------------------------------+----------------------+--------------- Usually rather large, black | Field cricket | Crickets Wingless, front legs shovel-shaped | Mole cricket | ============================================================================ 5. THE DRAGON FLY _An Insect adapted to Aerial Life_ _Materials._ Mounted specimens of dragon flies, some moist preserved specimens, living specimens if practicable, simple lenses. _Observations._ 1. Identify the three regions of the body and note the presence of a distinct neck. What is the length of the insect? What is its general form? If you have living specimens, discover what movements the head and abdomen are capable of making. 2. What is the position and general character of the wings? Explain how these wings are made very efficient for flying. Why should they not fold? 3. For what do the legs seem best adapted? Why? 4. Note the size of the eyes and of the antennæ? How do you account for the great size of the eyes and the relatively small antennæ?