CHRYSOMELIDAE. 343 



adopted by Chapuis (Gen. Col. x., p. 229-850). We have, how- 

 ever, modified tlie former, so as to make tlie sequence of g'enera 

 somevvliat more regular. 



Protliorax with distinct postociilar lobes beneath. 2. 



Protliorax with anterior margin straight beneath. 10. 



2. Protliorax not margined at the sides. 3. 

 Prothorax with distinct side niargiu. 7. 



3. Prosternal sutures obsolete. 4. 

 Prosternal sutures distinct. 6. 



4. Front thighs simple. f). 

 Front thighs strongly toothed. Trichotheca. 



5. Prothorax transverse, less ccmvex. Xanthonia. 

 Prothorax cylindrical, convex. ' Fidia. 



6. Head without sujiraocular lines. Adoxus. 



7. Body pubescent or squamose, middle and liind tibire not tootht^d. .S. 

 Body glabrous. t). 



8. Sides of prothorax entire, tibiie deeply sulcate, expand(>d at tip. 



Glyptoscelis. 

 Side of prothorax toothed, tibia; not expanded at tip. Myochrous. 



9. Tibiae deeply sulcate, antennae thickened toward the end ; claws, 



middle and hind tibiae not toothed. Chrysochus. 

 Tibiae not sulcate, antennae long, filiform; claws, middle and hind 



tibiae not toothed. Tymnes. 

 Tibiae sulcate, antennae thickened toward the end ; middle and hind 



tibiae toothed toward th(! tip. Paria. 



10. Head with deep supraocular and frontal lines. 11. 

 Head without supraocular lines. 12. 



11. Body glabrous, posterior tibi;B toothed. Metachroma. 

 Body pubescent, posterior tibiae not toothed. Graphops. 



12. Thorax margined at base. l:!. 

 Thorax not margined at base. Chrysodina. 



13. Antennae with 2d joint shorter than 3d. Colaspis. 

 Antenna with joints 2-5 nearly equal, G-11 wider and larg(>r. 



Metaparia. 



The last three genera e.xliibit relations in different directions 

 with the preceding and following tribes. Chrysodina, by its con- 

 tracted convex body is related to the Laniprosomidcs, a tribe not 

 represented in our fauna. Metaparia by its oblong form is not 

 dissimilar to the Clythrini, while Colasj)is, by its general appear- 

 ance approaches the next tribe. In addition to the character.s 

 given in tlie table, we may mention that the protean, and almost 

 irrecognizable (Jola.-'piH t7-istis differs from the other species in 

 the antennae being shorter, with the last five joints more thickened, 

 thus approaching, as it does in form, Chrysodeina, and differing 



