CARABID7E. LEISTUS. 43 



antennae black with the tips fuscous. Thorax very short, dilated 

 at the sides and rounded, contracted behind, coppery green, very 

 shining, margins more brilliantly green, thickly rugose-punctate, 

 margins elevated and more coarsely punctured and rugose, base 

 with two deep fovea?. Elytra broad, more dilated behind the 

 middle, coppery with the margins brilliant shining green, thickly 

 punctate- striated, interstices transversely strigose, with three 

 series of deeper impressions ; body beneath violaceous with a 

 greenish tinge on the sides of the abdomen, the underside of the 

 thorax shining green and somewhat rugose, legs black. Length 

 8-10 lines. 



Found on oaks in Windsor and Epping Forests ; Burghfield, 

 Berks; White Wood, Tetworth, Camb. ; Bagley Wood, Oxon ; 

 New Forest ; and Powerscourt, Ireland. 



Genus 14. LEISTUS, Frohlich. 



Mentum dente lato, leviter emarginato. Ligula valde elongata, 

 acute tricuspis ; paraglossis ei multo brevioribus, apice acu- 

 minatis. Maxillse extus palmate-dentate. Palpi elongati, 

 tenues, labiales articulo secundo maxime elongato. Labrum 

 apice rotundatum. Tarsi antici mans articulis tribus dilatatis } 

 subtus dense spongiosis. 



1 . L. spinibarbis : cyaneus ; thorace cordato, postice subangus- 

 tato ; elytris punctato-striatis ; antennis pedibusque rufo- 

 testaceis aut brunneis. 



Carabus spinibarbis, Fab. Ent. S. 1. 137. Fab. S. El. 1. 181. 

 Leistus spinibarbis, Dej. Spec. 2. 214 ; Icon. 2. 59. pi. 72. 



Steph. Mand. 1. 63, et Manual, p. 17. 

 L. cceruleus, Sturm, D. F. 3. 154. 

 L. niffricans, Newman, Ent. Mag. 1. 286. Steph. Mand. 5. 



373, et Manual, p. 17. 



Broad and depressed, above shining cyaneous, or bluish 

 green ; mouth, palpi and antennse red. Thorax with the sides 

 dilated and rounded in front, contracted behind, with a distinct 

 impressed central line, the disk on each side of it smooth and 

 convex, the entire base together with a fovea near each hinder 

 angle, and the anterior margin punctured, the lateral margins 

 reflexed and finely punctuated. Elytra wide, oblong-ovate, apex 

 rounded, punctate-striated, the third stria with some larger im- 

 pressions; underside black, legs pitchy black, tarsi rusty red, 

 the legs sometimes wholly red in less mature examples and the 

 m argins of the thorax also pale. Length 4 lines. 



A very abundant species, of which L. nigricans, as its name 

 imports, is a dark varietv. 



