THE INSECT HEAD SNODGRASS 



469 



and second trochanters {ITr^ 2Tr) and the femur {Fm). At the 

 end of the femur is a kneelike bend in the limb, followed by the 



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tibia {Th), the tarsus {Tar)^ and the praetarsus (Ptar). The seg- 

 ments evidently correspond with the segments of an insect's leg, 

 and are therefore here named according to the entomological leg 



