HOW TO KNOW THE IMMATURE INSECTS 



55a. Larva strongly sclerotized; dorsal and ventral prothoracic scler- 

 omes united into a solid cylinder; cervical membrane very large 

 and eversible forming a balloon-shaped sack below the head 

 when raised. Fig. 237 Family CEBRIONIDAE 



This small family is 

 ~ related to the wire 



worms. As for the Uni- 

 ted States our species 

 are southern or west- 

 ern. 



■CMKyCAK I^CffOf^A'^t £llPAMPtr> 



Fig 237. Cebrio antennatus Schfr. 



55b. Larva white and soft-skinned; dorsal and ventral prothoracic 

 parts not forming a cylinder; cervical membrane not eversible. 

 Fig. 238 Genus ^andaiivLs. RHIPICERIDAE 



The information available re- 

 garding the habits of this genus 

 is very limited. It is reported 

 that a mature larva of %anda.his 

 niger Knoch was taken from the 

 nymph of a Cicada, having de- 

 Fig. 238. Sondolus niger Knoch. veloped OS a porosite. 



56a. 9th abdominal segment with an unpaired pointed prolongation, or 

 paired cerci; bcdy with feather-like or spinose processes. 

 Fig. 239 Group Brachypsecti. DASCILLIDAE 



This group has but one known North American 

 species. 



This family of Soft-bodied Plant Beetles, has less 

 than a thousand known species. The most frequent 

 habitat is in proximity to water but only a compara- 

 tively small percentage of larvae and adults are 

 aquatic as with the species here pictured. 



Fig. 239. Bro- 

 chypsectra ful- 

 vo Lee. 



56b. 9th abdominal segment without prolongation or cerci; body with- 

 out conspicuous processes 57 



96 



