on the British Species of Donacia. 215 



D. impressa, however, is found in the Stephen- 

 sian Collection under the name D. brevicornis. 

 The description in the *' Illustrations" of D. 

 brevicornis is evidently taken from Gyllenhal, 

 and belongs to an insect which I have been un- 

 able to identify among our British species. I 

 possess a fine series of Z). impressa from Reigate, 

 for which I am indebted to Messrs. Linnell and 

 Brewer. 

 C. Femora unarmed. 



10. Elongate, narrow ; above of an uniform frosted 



green, passing, in different individuals, through 

 cupreous to purple : elytra simply truncated at 

 the apex. —D. //«e«rw, Hoppe,Gyllenh., Ahrens, 

 Steph., Lacordaire. D. simplex, Fab., Sp. Ins. 

 i. ^45, 2 ; Mant. i. 157, 2 ; Panz. 



I have, in the present month (July), taken 

 this insect near Hammersmith, and in the 

 Plumstead marshes, plentifully. 



11. Elytra less attenuated at the apex than the pre- 



ceding, the extreme point emarginated, and 

 leaving (usually) a slightly prominent' outer 

 angle : upper parts frosted golden-green, with 

 a purple interrupted band running parallel with, 

 and close to, the suture. — D. Typhce, Brahm in 

 Ahrens, Nov. Act. Halens. i. 3, p. 37, 19; 

 Kunze ; Gyll. iv. 680 ; Steph. ; Lacord. — 

 D, linearis, var. Gyll. iii. 663. 



I am indebted to Mr. Brewer for a series of 

 specimens of this insect, which were taken this 

 summer in the neighbourhood of Reigate. I 

 found the insect myself, many years back, at 

 Wandsworth Common. 



12. Form rather short, and legs depressed than the 



preceding species ; elytra somewhat ovate, ro- 

 tundate- truncate at apex; upper parts golden- 

 green, slightly glossy, with a cupreous band 

 running parallel with and near the suture, never 

 well defined, often indistinct, and even wanting. 

 — D. simplex. Fab. Syst. El. ii. 129, 13 ; Gyll., 

 Stephens, Lacordaire, &'c. D. mclanocephala 

 (Leptura id. Marsham), Stephens. D. semi- 

 cuprea, Panz., Fab., Redt. 



