184 MANDIBULATA. COLEOPTERA. 



plain disc of the thorax, which has merely an obsolete longitudinal row of 

 punctures in its centre, at once point out its distinctions. 



Found within the metropolitan district, and in Suffolk. 



Sp. 7. mutator. Oblongo-ovalis,' 'supra versicolor, infra splendide aureo- aut cupreo- 

 vir'idis aut amethystino-purpureus, thoracis disco impunctato, elytris profundi? . 

 punctato-striatis, striis per paria digestis. (Long. corp. 7 — 10 lin.) 



Sc. mutator. Marsham. — Ge. mutator. Steph. Catal. 107. No. 1111. 



Oblong-oval, above violaceous or green, of a rich amethystine hue, very glossy 

 and brilliant : clypeus very rugose, with an acute elevated tubercle on the 

 vertex : thorax convex, the disc impunctate glossy, with an irregular dorsal 

 channel, having a few scattered impressions in its centre, more or less ob- 

 literated anteriorly, arising from a punctate fovea on the anterior margin of 

 the thorax, and terminating a little before the hinder margin : scutellum large, 

 depressed in the centre, its margin membranaceous: elytra rather deeply 

 punctate-striated, the strife disposed in pairs, especially towards the shoulders 

 and outer margin of the elytra, the interstices convex, the third from the suture 

 punctate : body beneath very splendid and rich coppery or golden-green, or 

 rich amethystine purple, with brilliant iridescent shades : legs variable in hue, 

 like the upper surface; tarsi piceous: antennas fuscous at the base, with the 

 capitulum dusky. 



Extremely variable in colour, some examples being of a remarkably rich hue ; 

 but all have the striae on the elytra disposed in pairs. 



This insect occurs in the utmost profusion in some fields between 

 South Lambeth and Clapham, and is also found not uncommonly 

 in Battersea-fields : but during several years' research in the fields 

 to the north of London, about Islington, I never observed a single 

 example, although Geo. stercorarius abounds therein; whereas in 

 the former localities it is evidently rare : and as every individual 

 that I have inspected, amounting to several hundreds, possesses its 

 own peculiar characters, I feel convinced, notwithstanding the high 

 authority of Latreille, that Ge. mutator is positively a distinct species 

 from either of the others : — it is likewise found in Somersetshire, 

 near Bristol. " Swansea." — L. W. Dillwyn, Esq. 



Sp. 8. puncticollis. Oblongo-ovahts, violaceo-niger ; vertice tuberculo minuto, 

 thoracis disco undique sparsim punctata, elytris punctato-striatis interstitiis 

 subdepressis. (Long. corp. 7 — 10 lin.) 



Sc. puncticollis. Molinousky, Act. Hal. i. 50.— Ge. puncticollis. Steph. Catal. 

 107. No. 1112. 



Oblong-ovate : above deep violet-black, beneath violaceous : clypeus rugose, with 

 a minute tubercle on the vertex : thorax moderately convex, with a punctate 

 dorsal channel ; the disc throughout covered with scattered, not very distant, 



