104 CARABID.E. PTEROSTICHUS. 



S. concinnus, Curtis, Ent. pi. 171. 



S. cognatus, Steph. Mand. 5. 377, et Manual, p. 33. 



Considerably smaller than madidus, wingless, deep shining 

 black. Head with a transverse impression in front and two small 

 fovese placed further back than in madiflus, tip of the palpi red. 

 Thorax rotundate at the sides, narrowed and very much rounded 

 behind at the angles, dorsal furrow entire, base with two deep 

 fovese. Elytra more ovate and shorter than in madidus, rather 

 narrowed in front and rounded at the shoulders, sides also 

 rounded and widest behind the middle and not narrowed at the 

 apex, only very slightly sinuated, convex, deeply striated, the 

 striae impunctate, the third interstice with three punctures and 

 the margin with the usual series ; underside shining black, the 

 penultimate segment of the abdomen of the <? armed with an 

 obtuse tooth. Length 5J lines. 



This insect is found in the mountainous districts of the North 

 of England, Wales and Scotland. Abundant on the Snowdon 

 range, in August 1847. S. cognatus, Steph., does not differ 

 from it. 



(OMASEUS, Ziegler.) 



11. P. aterrimus : alatus, ater, nitidus ; thorace transverso, 

 postice utrinque foveolato, angulis posticis subrotundatis ; 

 elytris oblongis, subparalleliSj Isevigatis, subtilissime punc- 

 tato-striatis, profunde trifoveolatis. 



Carabus aterrimus, Payk. Mon. 127 (1790). Fab. S. El. 1. 



198 (1801). 



Harpalus aterrimus, Gyll. Ins. Suec. 2. 153. 

 Platysma aterrima, Sturm, D. F. 5. 29. 

 Feronia aterrima, Dej, Spec. 3. 290 ; Icon. 3. 75. pi. 135. 

 Omaseus aterrimus, Curtis, Ent. pi. 15. Steph. Maud. 1. 113, 



et Manual, p. 32. 

 Pterostichus aterrimus, Erichson, Kafer, 75. 



Winged, black, smooth and shining. Head with a ridge in 

 front on which are two small fovese, and behind it an oblong 

 fovea on each side, apex of the antennse fuscous black and 

 slightly pubescent. Thorax transverse or subquadrate, narrowed 

 and rounded behind, the lateral margins broadly reflexed, espe- 

 cially at the posterior angles, disk convex on each side the 

 dorsal furrow, which is interrupted in front by a deep depression, 

 and anterior to that there is a corresponding elevation, base 

 depressed, having on each side a large punctured fovea close to 

 the angles. Elytra oblong, broader than the thorax, not nar- 

 rowed in front, only the humeral angles a little rounded, sides 

 very nearly straight, apex rounded, disk convex, finely striated, 



