Unformatted text preview: • Examine the anteroventral corners of segments 2-9 and find the minute respiratory openings, the spiracles . 5. The terminal segments of the abdomen show some fusion. They are modified to form the external genitalia . In males, the posterior tip of the abdomen is rounded ventrally, and bears a pair of small, dark, triangular dorsolateral spurs, the cerci , which have a tactile sensory function. In females, cerci also are present, but the most conspicuous feature of the posterior abdomen in females is the ovipositor , which consists of 4 large conical prongs. What is the function of the ovipositor? Using the information above label the following diagram, depicting a female grasshopper. Figure 2. Grasshopper external features (Class Insecta)....
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- Fall '11
- Biology, relatively unspecialized abdomen, large metathoracic legs, dorsolateral spurs