SACKING. 3 



Ken to ^ ie Divisio)is of the Chrysomelidae. 



A. Mouth placed anteriorly. 



a. Antennae widely separated at base ; elytra 



of hard texture. 



a'. Intermediate ventral segments not 

 medially constricted ; pygidium not 

 exposed. 



a . Thorax without distinct lateral 

 margins, head produced, eyes 

 prominent, prosternum exceedingly 



narrow EUPODBS. 



I s . Thorax with distinct lateral margins 

 (rarely without), head not produced, 

 eyes not prominent, prosternum 



broad CYCLICA. 



b'. Intermediate ventral segments con- 

 stricted; pygidium usually exposed. . CAMPTOSOMES. 



b. Antennae not widely separated at base, 



generally closely approximate ; elytra 



more or less soft in texture TRICHOSTOMES *. 



B. Mouth not normal, small, hidden or nearly 



SO CaYPTOSTOMES *. 



Division EUPODES. 



Key to the Subfamilies. 



A. Antennae separated by entire front of head. 



a. Posterior femora very strongly incrassate : 



large sized insects of brilliant metallic 

 coloration Sagrince. 



b. Posterior femora only slightly incrassate : 



much smaller insects, less brilliant, rarely 



metallic Criocerince. 



B. Antennae not separated by entire front of head . Donaciincc. 



Subfamily I. SAGRIN^E. 



Head porrect, constricted at the neck ; antennae filiform with 

 robust cylindrical joints ; thorax not margined laterally ; elytra 

 at the base much wider than the thorax; legs robust with strongly 

 thickened posterior femora, these in the <$ furnished beneath with 

 one or more teeth; first abdominal segment twice as long as 

 any of the following segments. 



The Sayrince are the largest and most brilliantly coloured of all 

 the. ChrysomelidcK. Most of them are beautifully metallic and in 

 shape have a slight resemblance to certain species of Longicorns. 



Little or nothing is known of their larval state or habits, and 

 observations in these respects are greatly needed. 



A single genus, Sagra. 



* Not included in this volume. 



