2723 PHYTOPHAGA. [| Donacia. 
thickly pubescent, and the under-side is densely clothed with bright 
golden pubescence; head thickly sculptured with a short and deep 
central furrow, antenne with the basal joints pubescent ; thorax a little 
longer than broad, strongly punctured on disc, and rugose at sides, with 
distinct central furrow; elytra with shoulders strongly marked, much 
narrowed from posterior third, truncate at apex, with a strong impression 
just before middle near suture, and moderately strong rows of punc- 
tures which are confused at base and finer at apex, interstices finely 
rugose ; posterior femora long, reaching apex of elytra. L. 6-8 mm. 
Male with the last ventral segment of abdomen truncate and broadly 
impressed before apex, posterior femora with one sharp tooth. 
Female with the last ventral segment of abdomen rounded at apex 
and even, posterior femora with a smaller tooth. 
On aquatic plants; local; London district, rare, Battersea (Stephens); Aylsham 
(T. Wood) ; Hastings ; Eastbourne; Arundel ; Salisbury ; Devon ; Cambridge; Red- 
grave Fen; Potter Heigham, Norfolk ; Bewdley ; Repton; Scarborough; Hale Moss, 
and near Bowdon, Manchester district; Mabberley, Cheshire ; Northumberland 
district, Meldon Park ; Scotland, scarce, Solway, Tweed, Clyde, and Forth districts ; 
Ireland, Armagh. 
D. limbata, Pauz. (/emne, F.). Rather depressed, female broader and 
more parallel-sided than male, eneous, often greenish, each elytron with 
a reddish or purple band reaching along the margin, and a patch at base 
near suture ; this patch is sometimes absent, and occasionally the elytra 
are'unicolorous ; the under-side is thickly clothed with ashy silvery pubes- 
cence; head closely sculptured with a well-marked central furrow, antenne 
black with the first five joints metallic; thorax quadrate, feebly narrowed 
behind, with the anterior callosity obsolete, coarsely punctured on dise 
and more or less strigose ; elytra distinctly impressed, with comparatively 
fine rows of punctures, which become almost obsolete at apex, interstices 
finely strigose, apex truncate ; legs unicolorous, metallic. L. 8-11 mm. 
Male with the elytra more pointed at apex, the last ventral segment 
of the abdomen truncate and impressed at apex, and the posterior 
femora armed with a small blunt tooth. 
Female with the elytra broader and less pointed at apex, the fifth 
segment of the abdomen somewhat produced at apex, and the posterior 
femora armed with a smaller tooth, which is sometimes almost obsolete. 
On aquatic plants; local, but not uncommon in many districts ; Lee, Aylsham, 
Belvedere, Maidstone; Birchington; Pegwell Bay; Deal; Hastings; New Forest ; 
Southsea; Glanvilles Wootton ; Devon; Gloucester; Swansea; Bewdley; Cannock 
Chase; Repton; Ely; Cambridge Fens; Askham Bog, York ; Bowdon, near Man- 
chester; Manchester district, general on Sparganium (Chappell) ; not recorded from 
the Northumberland district ; it is said to have been taken in the Forth district of 
Scotland, but Dr. Sharp says that he has not seen an individual taken in this 
country. Ireland, near Dublin, and Armagh. 
D. bicolora, Zsch. (sagittariv, F.; aquatica, Sehrank.). Allied 
to the preceding, from which it may be distinguished by its colour, 
