gloves during this lab. Keep your hands away from your eyes and face when working with preserved specimens. Using forceps, hold a preserved grasshopper under running water to gently but thoroughly remove excess preservative. Then place the grasshopper in a dissection tray.
2. Use a hand lens to observe the grasshopper's parts. While referring to Figure 37-3, identify the head, thorax, and abdomen. Note how the thorax and abdomen are divided into segments.
3. Use forceps to spread out and examine both pairs of wings. Notice that the forewings are narrow and the hindwings are wide. Observe how the hindwings fold fanlike against the body.
4. Observe the legs. Grasp one of each pair of legs and notice how the legs are divided into segments. Gently bend the legs to observe their normal range of motion.
5. Examine the 11 segments of the abdomen. On abdominal segment 1, find the tympanum. Then, along each side of abdominal segments 1-8, locate the spiracles, which look like small dots. Gently touch the abdomen with a blunt probe to find the flexible membrane that connects the segments to one another.
6. While referring to Figure 37-4a, examine the grasshopper's head. Find the two antennae, two compound eyes, and three simple eyes. Use a sharp probe to push apart the mouthparts. Locate and identify the mandibles, maxillae, labium, and labrum. Note that each maxilla has a segmented feeler called a palpus and that the labium has two palpi.
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