10 CHBYSOMELID.E. 



Genus DONACIA. 



Donacia, Fabr. Syst. Ent. 1775," p. 195 : Thomson, Skand. Col. viii, 

 1866, p. 107. 



Type, D. crashes, Fab. 



Range. Europe ; N. America ; Asia ; India. A single species 

 from Java, Australia and Madagascar respectively. 



Characters those of the group ; head with deep lateral and one 

 central groove ; eyes large and convex ; antennae slender, filiform. 

 Thorax subquadrate, sides straight and angles generally pointed. 

 Elytra wider at base than thorax, punctate-striate, interstices 

 generally finely transversely wrinkled ; third joint of tarsi deeply 

 bilobed, claws simple. 



12. Donacia aeraria, Bob/, Trans. Ent. Soc. (3) iv, 1865, p. 7; Jacoby, 



Ann. Mus. Civ. Genova, xxvii, 1889, p. 150. 



Cupreous or greenish-aeneous ; head obscure fulvous, antennae 

 rufous, basal joints seneous, others stained with black. 



Cupreous or greenish-aeneous ; head ful- 

 vous ; antennae half the length of the body, 

 obscure rufous, basal joints more aeneous, 

 the others more or less stained with black 

 at the apex, second and third joints nearly 

 equal, each half as long as the fourth 

 joint. Thorax rather broader than long, 

 sides nearly straight, anterior angles rectan- 

 gular, not produced ; upper surface trans- 

 versely sulcate at the base, medial line 

 impressed by a distinct longitudinal groove, 

 much broader and deeper towards its base ; 

 disc entirely covered with fine transverse 

 rugae. Scutellum finely pubescent. Elytra 

 with the sides straight and parallel at their 

 anterior half, thence obliquely narrowed 

 towards the apex, the latter truncate ; upper 

 surface flattened along the suture, deeply punctate-striate, inter- 

 stices thickened and slightly raised, obsoletely transversely rugose. 

 Length 6-7 mm . 



Hab. India ; Burma : Bhaino ; Ceylon ; Malay Peninsula : 

 Tringganii ; Japan. 



Whether this insect has in reality the great geographical distri- 

 bution attributed to it by Baly is somewhat doubtful, as so many 

 species of Donacia are very closely allied. The type was, however, 

 described from Malay specimens. 



13. Donacia delesserti, Guer. Icon. Reg. Anim.,Ins. 1844, p. 258; 



Lacord. Mon. Phytoph. i, 1845, p. 116 ; Jacobson, Hor. Soc. Ent. 

 Ross, xx vi, 1892, p. 419. 



Very similar to D. ceraria, Baly, which may possibly be onlv a 



