DONACIA. 249 



transversely wrinkled. Posterior femora in male more 

 strongly toothed than in female. L. 3 — 4 1. Common. 



D. dentipes, Fab. 



U. Disc of elytra with two or more distinct impres- 

 sions. 



1, Thorax with a deep central furrow. 



A A, Elytra unicolorous or rather darker on 

 disc. 

 Upper-side green, usually with golden reflection ; under- 

 side with golden-yellow pubescence ; head and thorax 

 rarely blue. Thorax, elytra and posterior femora as in D. 

 lemnae. L. 4 — 4 J 1. Rather common. 



D. sagittai'iae, Fab. 



a JB. Elytra brown-bronze, with a dark purple 

 longitudinal streak (often indistinct) near side 

 margin and a spot at base. 



Head and thorax brown-bronze ; under-side with yellow- 

 ish-gray pubescence. Thorax quadrangular, coarsely punc- 

 tured in wrinkles, anterior angles not very prominent, the 

 elevation on each side indistinct ; elytra deeply punctured 

 in rows, interstices finely transversely wrinkled, each 

 elytron with two distinct, shallow impressions. Posterior 

 femora with a small tooth before apex, often indistinct in 

 female. L. 4 — 4| 1. Common. D. lemnae, Fab. 



2. Tliorax with a fine central furrow. 



A A. Forehead without prominence; posterior 

 femora distinctly toothed. 



a a. Anterior angles of thorax prominent. 



Upper-side brown-bronze, not very shiny; under-side 

 with golden-yellow pubescence. Thorax tolerably quad- 

 rangular, distinctly narrowed behind, punctured in wrinkles ; 

 elytra with distinct impressions, with punctured striae, 

 interstices very closely wrinkled transversely. L. 4 — 4|- 1. 

 Pare. I), oh s cur a, Gyll. 



b b. Anterior angles of thorax not prominent. 



Upper-side bronze ; under-side with yellow pubescence. 

 Thorax as long as broad, narrowed behind, punctured in 

 wrinkles ; elytra with punctured striae, interstices very 

 finely wrinkled transversely. L. 4 1. Rather common. 



D. thalassina. Germ, 



