HOW TO KNOW THE IMMATURE INSECTS 



shape and the appendages ordinarily are very different from those of 

 the aduh; while the body is often soft, thin skinned, or weakly sclero- 

 tized. 



TYPES OF LARVAE 



1. Campodeiform (Fig. 22), — The char- 

 acteristics of a campodeiform larva 

 are flattened body and long legs with 

 cerci or caudal filaments usually pre- 

 sent. The larvae of most of the Neu- 

 roptera, the Trichoptera, many of the 

 Coleoptera, Dytiscidae, Carbidae, Sta- 

 phylinidae, and the naiads of Plec- 

 optera, Ephemeroptera and Odonata 

 are campodeiform. 



Fig. 22. Larvae: o, ground beetle, 

 Pterostichus sp.; b, Dobsonfly, 

 Corydalus cornutus (L.) 



Carabiform (Fig. 23). — This is a modified 

 form of the campodeiform in which the 

 body is flattened but the legs are short- 

 er. Generally there are no caudal fila- 

 ments. The majority of the Chry some- 

 lid beetles and many other Coleoptera 

 (Lampyridae, Carabidae, Melyridae) ex- 

 hibit this type. 



Fig. 23. a, Caraboid instar of 

 meloid larva; b, saw-toothed 

 groin beetle, Oryzaephilus suri- 

 namensis (L.) 



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