270 MANDIBULATA. — COLEOPTERA. 



Much less abundant than either of the foregoing ;• found on the 

 banks of the Thames, near Brentford and Fulham. " With the 

 preceding, and at Wandsworth-common." — Mr. G. Waterhouse. 



Sp. 5. melanocephala. Supra cenea aut virescente cuprea, capite nigro,femo- 

 ribusrufo-piceis subbidentatis, elytris rude punctato-striatis, apice subtruncato. 

 (Long. Corp. 3 lin.) 



Le. melanocephala. Marsham.— Do. melanocephala. Steph. Catal 207. No. 

 2100. 



Above aeneous, beneath blackish-brass, with an ashy-fulvous pubescence : head 

 black, punctate : thorax with a deep dorsal channel, abbreviated at each end : 

 elytra golden brass, roughly punctate-striate, with the apex slightly truncate 

 the termination rounded in the middle, the apex of the suture with an elon- 

 gate cupreous patch: femora rufous, with the apex and tibiae pitchy-black, the 

 former rather obsoletely bidentate : antennae fuscous. 



The specimens of this insect, which are totally distinct from either of the fore- 

 going, which I obtained from the Marshamian collection, have the posterior 

 femora slightly bidentate, and are not simple as described by Marsham : iu 

 other respects his description accords. 



Not common : I have obtained specimens from BristoL " In 

 the moat round the Palace at Fulham." — Mr. G. Waterhouse. 



B. Posterior femora moderate, with a single tooth, 

 a. Legs nearly concolorous with the body. 



Sp. 6. Lemnae. Subdepressa, fusco-aenea, thorace rugoso-punctato, elytris lacu- 

 nosis, margine laterali vittdque baseos abbreviate purpureis, femoribus posticis 

 obsolete dentatis. (Long. corp. 4 — 5 lin.) 



Do. Lemnae. Fabricius.— Steph. Catal. 207. No. 2101. 



Somewhat depressed, fuscous-brass, beneath with an ashy pubescence: head 

 opaque, with a deep frontal groove: thorax subquadrate, thickly rugose- 

 punctate, with an obsolete dorsal channel : elytra slightly shining, with four 

 irregular depressions on the back, the disc punctate-striate, generally with an 

 abbreviated purple vitta at the base, and an elongate one on the lateral margin; 

 but one or the other, and sometimes both, of these are occasionally wanting : 

 legs rather short, greenish-black, the posterior femora towards the apex with 

 a more or less distinct tooth : antennae black, with the basal joint brassy. 



Not uncommon in marshes throughout tlie metropolitan district 

 in May and June. " Burwell-fen, Cambridgeshire.'" — Rev. L. 

 Jenyns. " Epping." — Mr. Douhleday. " Duddingston-loch." — 

 Rev. W. Little. 



Sp. 7. dentipes. Subdepressa, thorace ceneo, crebre rugoso-punctato, elytris 

 viridibus vittd laid media coccineo-cupreS, pedibus ceneis. (Long. corp. 4—5 

 lin.) 



