~ 
Donacia.| PHYTOPHAGA. 975 
On aquatic plants, Typha, Sparganium, Carex, &e., in Juve and July; local, and, 
as a rule, not common ; Lewisham, Wandsworth, Surrey Canal, Croydon, Tilgate; 
Pegwell Bay; Deal ; Sandwich ; Hastings; Faygate, Sussex ; Droitwich ; Cheshire ; 
Manchester ; Northumberland and Durham district ; Svotland, very rare, Clyde and 
Forth districts ; Ireland, Armagh. 
D. clavipes, F. (menyanthidis, Gyll. ; mutica, Thoms.). A large 
and very distinct species, which may be easily known by the shape 
and sculpture of the thorax, which has the anterior angles rounded, 
and is gradually narrowed from just behind front margin to base, and 
has the upper surface very shining, transversely strigose with the 
dise often almost smooth; the general form is elongate, moderately 
convex, gradually narrowed behind in male, which is smaller than 
female ; the colour of the upper surface is bright golden green, rarely 
coppery, and the antenne and legs are ferruginous, the latter being 
partly metallic ; the under-side is silvery ; the elytra are deeply crenate- 
striate, with the interstices rugose, and the apices are separately 
rounded ; the femora are simple in both sexes. L. 7-12 mm. 
Male with the fifth ventral segment subtruncate at apex, female with 
the same segment somewhat produced. 
On aquatic plants, in May and June; local; Surrey Canal, Woking, and other places 
in the London district ; Potter Heigham, Norfolk; Whitstable ; Hastings; Arundel ; 
Portsmouth district; Swansea; Barmouth; Whittlesea Mere; Burton-on-Trent ; 
Manchester district (on Arundo phragmites); Scotland, rare, Solway and Forth 
districts; it probably occurs in many other localities, as it is widely distributed. 
D. semicuprea, Panz. (stinplex, F., Syst. El.; iris, Westh.). <A 
rather short species and comparatively broad and convex, of a greenish- 
coppery or golden-green colour, occasionally green with a purplish band 
on each elytron, and rarely nigro-eneous, under-side silvery ; male much 
narrower than female ; head finely and thickly punctured, antenne dark 
brown or blackish, with the base of the first joint sometimes lighter ; 
thorax longer than broad, gradually narrowed behind, thickly and 
strongly punctured, with the central furrow variable, sometimes broad 
and deep, at other times obsolete; elytra widest about middle, obso- 
letely impressed, crenate-striate, with the interstices rugose, obtusely 
truncate at apex, but with the external angles rounded; legs rather 
long, metallic, with the base of femora and the tibiz towards apex 
pitchy red ; posterior femora simple in both sexes. L. 5-9 mm. 
Male with the first ventral segment of abdomen broadly impressed 
longitudinally in the middle, and the fifth subtruncate at apex ; female 
with the first ventral segment even, and the fifth somewhat produced at 
apex. 
On aquatic plants in May and June; local ; London district, not uncommon and 
widely distributed; Hastings ; Sandwich; Pulborough, Sussex; Dover; Devon; 
Bristol: Swansea; Knowle; Rainham, Norfolk; Hertford; Ess x; Oxford (R. 
Isis) ; Lincoln; Selby, York; Scotland, rare, Forth district, ‘‘ Braid Ponds, Loch 
Leven,” Murray’s Cat, Ireland, Armagh. A 
Tas 
