HOW TO KNOW THE IMMATURE INSECTS 



128a. Legs present and fully developed; body curved and plump. 

 Fig. 334 SublamUy Sagrinae*. CHRYSOMELIDAE 



The members of this small subfamily are the 

 most primitive of all the leaf beetles. 



Fig. 334. Sagra fe- 

 morato Jac. 



128b. Legs absent; body straight. 



Fig. 335 Subfamily Orsodacninae*, CHRYSOMELIDAE 



The adults feed on spring buds and 

 are highly variable. 



Fig. 335. Zeugophora scutel- 

 laris Suffr. 



129a. Spiracles on 8th abdominal segment biforous, terminal, and pro- 

 jecting like a pair of spurs. 

 Fig. 338 Subfamily Donaciinae*, CHRYSOMELIDAE 



The larvae are aquatic and feed on 

 the roots or in the stems of aquatic 

 plants. The pupae are enclosed in tough 

 cocoons attached to roots of the host 

 plants. 



Fig. 336. Donocio sp. 



129b. Spiracles of 8th abdominal segment not projecting like spurs.. 130 



* The family Chrysomelidae is such a large one that some Coleopterists have proposed 

 splitting it up into o number of families. We have chosen to follow Leng and give 

 these ten groups subfamily significance. 



122 



