PHYTOPHAI \. -J71 



tie*, Epping, Windsor, Humault, Hertford, Salisbury, and Cumberland. Ireland, 

 Armagh (Johnson). 



D. veraicolorea, Brahm. (bidens, 01. ; cincta, Germ.). Of a shorter 

 and rounder form than the two preceding, and more shining, of a 

 greenish metallic colour at sides, with the disc of thorax and elytra 

 violaceous, or coppery, sometimes dark green, under-side silvery ; head 

 thickly and finely punctured ; thorax, especially in the male, a little 

 longer than broad, contracted behind middle, strigose and rather strongly 

 and sparingly punctured on disc; elytra deeply punctate-striate, inter- 

 stices diffusely strigose, apex truncate ; legs reddish with the club of 

 the femora and usually external portions of the tibiae metallic, violaceous. 

 L. 6-9 mm. 



Male with the posterior femora armed with two teeth, and the 

 posterior tibiae crenulate on their inner side. 



Female with the posterior femora armed with a small tooth, and the 

 posterior tibia? very rarely crenulate. 



On aquatic plants ; not uncommon and widely distributed ; Lee, Chobhntn, 

 Woking, Esher, Wimbledon, Baling, Uusper, Ayl>h:nn ; Deal; Hastings; Arnndi-1 ; 

 New Forest ; Sandown ; Swansea ; Barrnouth ; Knowle, near Birmingham ; Liver- 

 pool; Manchester, general on Potamogeton ; Northumberland and Durham district ; 

 Scotland, local, Solway, Tweed, Forth, and Dee districts; Ireland, near Dublin. 



D. spargranii, Ahr. In general appearance this species much 

 resembles D. dentata, but may easily be distinguished by the shorter 

 femora and the sculpture of the thorax, which is, finely strigose and 

 not punctured on disc; the legs are unicolorous, dark, and more or Irss 

 metallic, whereas in D. dentata they are more or less red, and the 

 antennae also, which in the latter species have the basal part of the 

 first joints, at all events in the male, red, are in D. sparganii uni- 

 colorous; the colour of the upper side is usually dark coppery green ; 

 the thorax is quadrate, and dull, and the elytra are not so deeply 

 punctured as in the preceding species, nor are the interstices so plainly 

 strigose. L. 7-9 mm. 



Male with the fifth ventral segment of the abdomen impressed at 

 apex, the posterior femora bidentate, and the posterior tibiae slightly 

 crenulate internally. 



Female with the fifth ventral segment of abdomen even, and the 

 posterior femora armed with two teeth, the external one being small. 



On aquatic plants ; very local, but sometimes not uncommon where it occurs ; 

 Wandsworth ; banks of Thames; Pegwell Bay, in ditches (Gorham); Sandwich; 

 Burton-on-Trent ; Manchester district, Clifton, Charlton, Stretford, Ac. 



D. dentipes, F. (aquatica, L., Thorns.). A very conspicuous 

 species, which may easily be recognized by the broad purple red stripe 

 which runs down the elytra near suture, the suture and margins as well 

 as the head and thorax being golden green ; the antennae and legs are 

 the latter being mostly of a golden metallic colour and 



