THE INSECT: ITS EXTERNAL STRUCTURE 



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of insects. There is a tendency in some groups, carried farthest in the 

 higher Hymenoptera, for the first segment of the abdomen to consolidate 

 more closely with the metathorax than with the second abdominal seg- 



FIG. 17. Different forms of insect legs. A, Cicindela sexguttata Fab. (beetle); B, 

 Nemobius fnsciatus De G. (cricket) hind leg; C, Stagomantis Carolina L. (Mantis) fore leg; 

 D, Pelocoris femoratus P. B. (carnivorous bug) fore leg; E, Gryllotalpa borealis Burm. 

 (mole cricket) fore leg; F, Canthon Icevis Dru. (a digging beetle) fore leg; G, Phanceus 

 carnifex L. (a digging beetle) fore tibia and tarsus of female; H, same, fore tibia of male; 

 /, Dytiscus fasciventris Say, male (water beetle) fore leg; C, coxa; /, femur; s, spine; t, 

 trochanter; tb, tibia; ts, tarsus. (From Folsom.) 



ment, which in such cases is often slender and gives thereby a semi- 

 detached appearance to the rest of the abdomen, as though the line of 

 division between thorax and abdomen were at that place instead of 



