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The terrestrial Adephaga of Iowa (Part 1) by Fanny Chastina Thompson Wickham, 1895

The terrestrial Adephaga of Iowa by Fanny Chastina Thompson Wickham, 1895, Page 12

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to the body is called the coxa on the inside of which, between it and the femur is an additional piece, the trochanter. The first long piece of the leg is the thigh or femur, the next is the tibia, attached to the tibia is a series of from one to five pieces constituting the tarsus, the last joint usually having two claws, these however are sometimes wanting. Between the claws is seen, in some species, a small appendage, more or less retractile, called the onychicum; this often bears at the tip one or more bristlelike appendages, the paronychia. The form of the legs varies greatly in the different families; being fitted for walking, ambulatorial; digging, fossorial; or swimming, natatorial. Abdomen. The third and last portion of the body is the abdomen. It consists of a series of segments, usually nine, the dorsal portions of which are covered by the elytra, the ventral portions being visible from beneath. The spiracles are situated in the connecting membrane, or in the upper inflexed portion of the ventral segments.
 
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