828 PHYTOPHAQA. [GaleruceHa. 



and central lino of thorax, and the scutellum and humeral prominences, 

 blackish; head large, antennae long, dark ; thorax transverse, with thu 

 sides angled in the middle ; elytra very thickly and finely, almost 

 rugosely punctured, entirely rounded at the apical sutural angle ; legs 

 moderately stout, testaceous. L. 4-6 mm. 



Male with the fifth ventral segment of the abdomen deeply impressed 

 in a semicircle. 



Female with the fifth ventral segment broadly incised subtriangularly 

 at apex. 



On Viburnum opulus (the Guelder Rose), and more rarely on Viburnum lantana 

 (the VVayfariug-tree) ; lociil ; London district, not uncommon, Dun-nth Wood, Lee, 

 Woking, Forest Hill, Micklehain, Kusper ; Weston, Oxon ; Hastings; Glanvilles 

 Wootton ; Swansea ; Knowle, near Birmingham ; Leicester ; Robins Wood, Repton ; 

 Scarborough ; Northumberland and Durham district ; Scotland, Solway district, 

 " Raehills, Rev. W. Little," Murray's Cat. 



Cr. nymphaeae, L. Oblong, rather depressed, fuscous black or dark 

 brown, with the front of head, the thorax (except two or three dark 

 spots), the border of the elytra and the greater part of the legs rufo- 

 testaceous ; head rather large, with a furrow hi front, antennae short and 

 stout, dark with reddish base ; thorax angled in middle of sides, with the 

 disc shiny and almost im punctate, with one or two foveae in centre, and 

 one at each side, the latter being thickly and almost rugosely punctured; 

 elytra subparallel, clothed with fine greyish pubescence, thickly, rather 

 coarsely, and somewhat rugosely punctured, with distinct traces of raised 

 lines, and with the sutural angle of each produced into a short sharp 

 point ; under-side clothed with whitish silky pubescence ; legs reddish- 

 testaceous, with the base of femora and the tibiae more or less infuscate. 

 L. 6-8 mm. 



Male with the fifth ventral segment of abdomen deeply impressed 

 triangularly at apex, and the posterior tibiae slightly curved. 



Female with the fifth ventral segment narrowly but deeply incised at 

 apex. 



On aquatic plants, especially species of Nymphaea and Nupar ; local, but not un- 

 common in many districts ; Snodland, Kent ; Tooting, Surrey ; Aylsham ; Pegwell 

 Bay; Deal ; Hastings ; Arundel; Hants ; Glanvilles Wootton ; Swansea; Gloucester; 

 Coleshill ; Knowle ; Cannock Chase ; Horning Fen ; Cheshire ; Scarborough ; 

 Northumberland and Durham district, not common; Scotland, Tweed and Forth 

 districts ; Ireland, near Dublin and Armagh. 



Cr. sag-ittariae, Gyll. (aquatica, Fourc.). Very closely allied to 

 the preceding, and by many authors regarded as merely a variety ; it 

 may, however, be known by its colour, which is much lighter, being 

 obscure yellow-testaceous, and by the duller forehead, which is 

 extremely finely punctured, but especially, according to "Weise, by 

 having the sutural apical angle of the elytra rounded and not produced ; 

 the large foveae at the sides of thorax are more finely punctured, and 

 the general size is smaller ; the colour differences are often misleading in 



