Donacia. | PHYTOPHAGA. 277 
having the antenne comparatively short and stout, with the third joint 
less elongate and only a little longer than the second, and especially 
by the fact that the anterior angles of the thorax are rounded and 
deflexed, and the lateral callosities are much less marked and are con- 
founded anteriorly with the margin; the antenne and legs are some- 
times partially ferruginous. LL. 63-9 mm. 
On aquatic plants ; it was first recognized as taken in Perthshire by Mr. James 
Foxcroft in May, 1854, but has since been found in several localities in England ; it 
appears to prefer rather high boggy districts; local ; London district not uncommon, 
Lewisham, Wimbledon, Woking, Esher, Chobham; Deal; Sutton Park ; Cannock 
Chase; Manchester district, rare; Northumberland and Durham district, not un- 
common, especially in mossy holes on the moors ; Scotland, common in bogs on the 
moors, Solway, Tay, Dee, Moray, and probably other districts. 
BD. braccata, Scop. (nigra, F.). A large and conspicuous species, 
elongate, subparallel, rather convex, black, with a more or less distinct 
purple reflection, thorax greenish, under-side thickly clothed with 
greyish or golden-yellowish pubescence, antenne, legs, and last four 
segments of abdomen red, searcely pubescent; head finely and thickly 
punctured, with the central furrow long and deep, antennz long; thorax 
subcordate, strongly narrowed behind, impressed at base, not strongly 
punctured, with central furrow often obsolete, anterior angles small and 
blunt ; elytra parallel-sided, separately rounded at apex, with rather 
strong punctured strie, interstices coarsely rugose; posterior femora 
with a strong tooth in male, and a feeble or almost obsolete tooth in 
female. L. 9-11 mm. 
Male with the metasternum and first ventral segment of abdomen 
broadly impressed and the fifth segment slightly emarginate at apex, 
thorax sparingly punctured and smooth in the middle. 
Female with the fifth ventral segment subtruncate at apex, and the 
dise of thorax rather closely punctured. 
On aquatic plants, Phragmites, &e., in June; local, and as a rule rare, but 
occasionally found in abundance, especially near the coast; Battersea (Stephens), 
Greenwich, Woolwich, Gravesend, Southend, Whitstable; Bearsted ; Pegwell Bay; 
Deal; Hastings; Swansea; Cambridge ; Whittlesea Mere. 
D. affinis, Kunze. Oblong, subparallel, rather convex, upper side 
metallic, especially in female, under-side silvery, except the last four 
segments of the abdomen, which, together with the antennz and legs, are 
red ; head closely punctured, with deep central furrow, antenne com- 
paratively short ; thorax subquadrate, gradually and slightly narrowed 
behind, rather finely punctured, with the anterior angles slightly pro- 
minent and callose ; legs short. L. 5-8 mm. 
Male with the upper side black with a purple reflection, or violaceous, 
the thorax sparingly punctured, the metasternum and first ventral 
segment broadly impressed, and the last segment slightly emarginate, 
the posterior femora thickened and armed with a strong sharp tooth, and 
the elytra punctate-striate, with the interstices finely coriaceous. 
