16 



CHRYSOMELIN E. 



Key io the Genera of Indian Chrysomelince. 



1. Anterior coxal cavities open behind . 2. 

 Anterior coxal cavities closed (al- 

 most closed in Apaksha) behind.. 13. 



2. Claws throughout simple or angu- 



larly dilated at the base 3. 



Claws split or cut in the middle .... 11. 



3. Epipleura of the elytra on the inner 



margin entirely, or at least towards 

 the apex, with a row of cilia-like 



bristles * 4. 



Epipleura without cilia-like bristles . 8. 



4. Antennae comparatively slender, dis- 



tinctly passing beyond the base of 



the pronotum 5 



Antennae comparatively stouter, just 

 reaching or not reaching the base 

 of the pronotum 7. 



5. Metasternal process bordered all 



round by a deep furrow, the sides 



as well as the apex Chryso lina, Motsch .[Chry- 



Metasternal process with furrow at somkla, auctt.J, p. 17. 



the sides only, the apexnot included. 6. 



6. Insects small, 7-8A mm., coloration 



metallic, elytra with a postbasal 

 transverse depression, punctuation 



scattered Ambrostoma, Motsch., p. 44. 



Insects large, 1 1—14 ^ mm., non- 

 metallic, elytra with four pairs of 

 longitudinal rows of punctures and 



no postb isal depression Paralina, Baly, p. 4G. 



7. Body not spherical, the contrast be- 



tween the thickened apical seg- 

 ments ot the antennae and the more 

 slender basal segments not strongly 



mark, d Edmela, Baly, p. 49. 



Body spherical, very convex, the con- 

 trast between the thickened apical 

 segments and the basal segments 



of the antennae strongly marked . . Sph^uoltna, Baly, p. 53. 



8. Base of elytra about twice as broad 



as width of prothorax Agasta, Hope, p. 56. 



Base of elytra not so broad 9. 



9. Elytra with rows of punctures at 



regular intervals Phaeuon, Latr., p. 59, 



Elytra with no such rows of punc- 

 tures 10. 



10. Insects small, 5-9mir>., convex, ovate, 

 coloration with metallic shimmer, 

 elytral punctuation with a tendency 



to form rows Plagiodera, Redt.,p. 60. 



Insects large, about 11 mm., elongate, 

 coloration without metallic shim- 

 mer, elytral punctuation generally 



confused Chrysomela,L [Melasoma, 



Stephens], p. (>7. 



* To appreciate tnis character, see iig. 15 13. p. 46. 



