HOW TO KNOW THE IMMATURE INSECTS 



8a. 2 or 3 pairs of hooks present on tergiun ol 5th abdominal seg- 

 ment. Fig. 174 Family CICINDELIDAE 



Fig. 174. Megacephola Carolina (L.) 



The family consists of about 

 2,000 species and their adults 

 ore called tiger beetles. The 

 larvae live in vertical or slant- 

 ing, cylindrical burrows often 

 a foot or more deep in which 

 they can move up and down 

 by aid of the dorsal hooks of 

 the fifth abdominal segment. 

 They are predacious and found 

 along the sandy banks of riv- 

 ers and bodies of water, in wet 

 meadows, and in damp par- 

 tially shaded canyons. 



8b. No hooks on 5th abdominal tergum 9 



9a. Terminal setae of tarsus much shorter than claws; retinaculum 

 single or absent. Fig. 175 Family CARABIDAE 



rig. 175. Harpalus viridiaeneus Beauvois. 



The family is very large, 

 comprising around 21,000 de- 

 scribed species. The larvae 

 are carnivorous and living 

 in the soil, grass, under de- 

 bris or dead bark. Pupation 

 takes place in a cell in the 

 ground. They are elongate, 

 usually flattened and grub- 

 like, and often very active. 



9b. Terminal setae ol tarsus much longer than claws; retinaculum 

 bicuspidate. Fig. 178 FamUy OMOPHRONIDAE 



The members of this small family live 

 in the sand and debris along water 

 courses. They are comparatively rare. 



Fig. 176. a, leg of Omophron; 

 b, Mandible of Omophron; c, 

 Omophron sp. 



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