Hydrothassa. | PHYTOPHAGA. 319 
Male with the tibie dilated towards apex, the anterior slightly, and 
the posterior very slightly, curved, and the tarsi moderately dilated. 
Female with a longitudinal raised fold at shoulders of elytra. 
Banks of rivers and marshy places, at roots of plants and grass, in flood refuse, &e. ; 
often found jin abundance in spring in Ranunculacee ; common and generally distri- 
buted throughout the greater part of England, but somewhat local in some districts ; 
Scotland, Solway and probably several other districts; Ireland, Dublin, Armagh, 
_ Belfast, and most likely general. 
In both this and the preceding species varieties occur rarely in which 
the reddish-yellow colour of the side margins is very obscure, sometimes 
almost pitchy, or slightly zneous. 
H. hannoverana, F. Ovate, or obovate, rather convex, shining, 
of a bluish or greenish black or nigro-zneous colour, with the margins 
of thorax and elytra broadly yellowish-red, and a broad longitudinal 
band of the same colour on the disc of each elytron, which extends from 
base to apex, and is curved outwards a little before base ; head finely 
punctured, antenne black, with the seventh joint slightly produced in a 
triangular Jobe on its upper surface ; thorax transverse, narrowed in 
front, very diffusely punctured, more finely on disc than at sides ; 
elytra with strong punctured striz, interstices slightly convex and almost 
smooth; the elytral bands are somewhat variable, being occasionally 
interrupted ; legs black. L. 4-45 mm. 
Male with the tibiz dilated towards apex, and the anterior pair slightly 
curved ; tarsi moderately dilated. 
Female with the fifth and seventh interstices raised and subcostate at 
base. 
In damp meadows on Caltha palustris and other Ranunculacez in spring ; rare ; 
Askham Bryan, near York (Preston) ; Fulford, near York (Hey); Hampshire (Mon- 
creaff) ; I do not know of its occurrence in any other locality in Britain ; Weise says 
that it is common in tne northern half of Germany, but sparingly distributed in the 
southern half, and Thomson records it as rather rare in Norway and Sweden. 
PRASOCURIS, Latreille. (Helodes, Paykull.) 
The members of this genus may be easily distinguished by their elongate 
and narrow form and quadrate or oblong thorax, which is margined at 
base ; the under-side is sparingly pilose ; the elytra are furnished with 
nine punctured strize, and the prosternum is broad between the coxe, 
and has the process not margined ; of the five European species two are 
found in Britain :— 
I. Upper surface unicolorous blue . ... . . . . . P. suNcI, Brahm. 
(beccabunge, I1'.) 
II. Upper surface black-bronze, with the sides of thorax, and 
elytra, and a longitudinal band on each of the latter, 
yellow’. 3 Weta: «ors \s oye © 6 2 + = = © cs PHERCANDRIG 
P. junci, Brahm. (beccabunge, Ill.). Elongate, oblong, rather 
