Which order has a pronotum that does not extend beyond the base of the wings and hind femora greatly enlarged for jumping, with a tarsal formula of 3-3-3?

• A. Acrididae
• B. Tettigoniidae
• C. Blattodea
• D. Gryllacrididae

Answer: (A)

Jumping capability and body shape are giving clues here. In short-horned grasshoppers like Acrididae, the pronotum is short and ends near the base of the wings, the hind femora are greatly enlarged for powerful jumps, and the tarsi typically have three segments on each leg (3-3-3). This combination of a short pronotum,強 hind legs built for jumping, and a 3-3-3 tarsal pattern is characteristic of Acrididae, making them the best fit for the described features. Katydids (Tettigoniidae) usually have a pronotum that extends over the abdomen and different leg proportions, while Blattodea and Gryllacrididae show other wing and leg configurations that don’t match this specific set.