CARABID.E. TRECHUS. 169 



convex, with the dorsal line entire, and two deep fovese nearly 

 covering the base. Elytra oblong-ovate, with a cyaneous reflec- 

 tion, rather convex, the disk of each furnished with three coarse 

 abbreviated stria3 and a fourth interrupted and somewhat obsolete, 

 sides and apex smooth, with four or five impressions within the 

 margins, near the humeral angles ; body beneath shining black, 

 with the tip of the abdomen broadly testaceous, legs red. Length 

 2^ lines. 



I captured a pair of this remarkable species at Whittlesea 

 Mere, in July 1847. 



7. T. minutus : rufo-piceus ; thorace transverso t postice utrinque 

 foveolato, angulis posticis obtusis ; elytris oblongo-ovatis, 

 striis quatuor dorsalibus distinctis, externis obsoletis ; 

 antennis pedibusque testaceis. 



Carabus minutus, Fab. S. El. 1. 210. 



Trechus minutus, Steph. Mand. 1. 169. Erichson, Kafer, 121. 



Heer, Faun. Helv. 120. 

 Carabus tempestivus, Panz. Faun. 73. 6. 

 Bembidium 4-striatum, Gyll. Ins. Suec. 2. 31. 

 Trechus rubens, Clairv. Ent. Helv. 2. 26. Sturm, D. F. 6. 97. 



Dej. Spec. 5. 12 ; Icon. 4. 296. pi. 204. 

 T. aquaticus, fuscipennis et tristis, Steph. Manual, p. 49. 

 T. Icevis, Steph. Mand. 5. 394. 



Var. /3. elytris stria tertid punctis duobus impressis. 

 C. \-striatus, Dufts. Faun. 2. 185. 

 Trechus obtusus, Erichson, Kafer, 122. 



Variable in colour, pitchy red or ferruginous, the head usually 

 pitchy black, sometimes also the thorax with the margins reddish. 

 Head with a deep elongate impression on each side, between 

 which and the eye is an elevated fold ; the parts of the mouth 

 and the antennae testaceous. Thorax transverse, the breadth in 

 front greater than the length, the sides rounded below the ante- 

 rior angles, more or less obliquely narrowed behind, posterior 

 angles obtuse, disk very smooth and shining, with a deep dorsal 

 furrow terminating before and behind in an evident depression, 

 the base with a large fovea on each side near the angle. Elytra 

 oblong-ovate, much broader than the thorax, sides rounded and 

 dilated behind the middle, depressed, each with four striae next 

 the suture, the exterior ones more or less obsolete and not reach- 

 ing the apex; the first next the suture forms a bend at the apex, 

 and passing along the margin is carried upwards beyond the 

 next three, presenting the appearance of a regular curve ; under 

 a strong magnifying power the stria appear obsoletely punctured 



