SQUASH-BUG: LABORATORY WORK. 



Can you distinguish three regions in the body ? How 

 many legs do you find ? Have these the same joints as in 

 the grasshopper ? How many joints in the tarsus ? Do 

 you find compound eyes, ocelli, and antennae on the head ? 

 Examine the lower surface of the head and find the beak. 

 See if with needles you can separate it in several needle-like 

 parts. This can only be done with great care in so small 

 a form as the squash-bug. The student, if successful, will 

 find four needle-like pieces (mandibles and maxillae) 

 sheathed in a groove-like labium. Could this beak be 

 used for biting and chewing, or for piercing and sucking ? 

 Notice the wings, drawing one of each pair. In the 

 anterior wing are the basal and distal parts equally thick ? 

 How many joints in the abdomen? Where are the 

 spiracles ? 



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