DONACIA. 251 



disc ; under-side with silver-gray pubescence. Thorax 

 very closely punctured, with a prominence on each side in 

 front and a central furrow or depression on basal part of 

 disc ; elytra with rows of deep punctures, interstices finely 

 wrinkled transversely, outer apical angle rounded. Pos- 

 terior femora not reaching apex of elytra. L. 3| — 4 1. 

 Common. D. semicuprea, Panz. 



2. Elytra separately rounded at apex. 



Upjjer-side golden-green ; under-side with close silvery 

 pubescence, antennae and legs reddish. Thorax almost 

 longer than broad, finely wrinkled transversely, with central 

 furrow, with a prominence on each side in front, middle of 

 sides slightly sinuate ; elytra with rows of deep punctures 

 and very fine wrinkles. Posterior femora reaching apex of 

 elytra. L. 4| 1. Eather common. D. mcnyanthidis, Fab. 



II. Upper-side closely pubescent. 



Bronze ; pubescence on upper-side very fine, gray, on 

 under-side close, silvery ; base of femora and often of 

 antennae red. Thorax as long as broad, with a blunt 

 prominence on each side in front, slightly narrowed 

 behind ; elytra with very fine punctured striae arid flat 

 interstices. L. 3i — 4| 1. Eather common. 



D. hydrochaeridis, Fab. 

 J?. Elytra more or less convex, 



<*» Posterior femora with a strong, triangular tooth in 

 both sexes ; each elytron with two small depressions ; 

 legs concolorous with body. 



I. Third joint of antennae distinctly longer than 

 second ; elytra narrowed from shoulders. 



Upper-side purple, golden-green, blue or coppery ; 

 under-side with golden-yellow pubescence. Thorax finely 

 wrinkled, with a deep central furrow, with a large promi- 

 nence on each side in front, anterior angles scarcely promi- 

 nent ; elytra with punctured striae, interstices finely 

 wrinkled transversely, apex rounded. L. 3 — 3| 1. Common. 



D. sericea, Lin. 



II, Second and third joints of antennae about equal 

 in size ; elytra parallel-sided until near apex. . 



Similar to D. sericea but broader, antennae and legs 



