100 CARABIDvE. PTEROSTICHUS. 



at the base black and glabrous, the remainder fuscous and 

 pubescent. Thorax subquadrate, narrowed in front, but nearly 

 straight from about the middle to the hinder angles, which are 

 right angles, the lateral margins incrassated, disk very strigose, 

 with a strong dorsal furrow and two elongate very deeply 

 impressed striae on each side at the base. Elytra ovate, very 

 broad, the breadth being slightly greater than that of the base 

 of the thorax, humeral angles prominent, sides very slightly 

 widest behind the middle, apex broadly rounded with the apical 

 margin itself very slightly sinuated, deeply striated, having an 

 elevated keel-shaped longitudinal ridge extending from the 

 shoulders to about the middle of the seventh interstice, where it 

 disappears, several of the interstices next the suture being 

 elevated also at the extremity; legs incrassated, pitchy black, 

 tibiae and tarsi with red cilia. Length 8-9 lines. 



Very common. 



(PTEROSTICHUS, Bonelli.} 



5. P. niger: oblongus, niger, subnitidus ; thorace quadrato, pos- 



tice utrinque leviter impresso bistriatoque, angulis posticis 

 rectis ; elytris profunde striatis, punctis tribus impressis. 



Carabus niger, 111. Kaler, 1. 182. Fab. S. El. 1. 178. 

 Harpalus niger, Gyll. Ins. Suec. 2. 86. 

 Feronia nigra, Dej. Spec. 3. 337; Icon. 3. 108. pi. 142. 

 Platysma nigra, Steph. Mand. 1. 124, et Manual, p. 35. 

 Pterostichus niger, Erichson, Kafer, 70. Heer, Faun. Helv. 81. 



Oblong, black, slightly shining. Head with the usual fovese 

 between the antennae, the latter with three joints at the base 

 black and glabrous, the remainder fuscous and pubescent. 

 Thorax quadrate, finely margined and the margins reflexed, 

 slightly narrowed behind, posterior angles right angles, disk 

 much wrinkled, depressed, with a deep dorsal furrow, base with 

 a double impressed stria on each side. Elytra oblong, narrowest 

 in front, dilated behind the middle, deeply striated, the striae 

 obsoletely punctate-crenate. S with an elevated oblong tubercle 

 on the last segment of the abdomen. Length 8-10 lines. 



Common. 



6. P. pammpunctatus : apterus, niger, nitidus ; thorace qua- 



drato, postice angiLstato, basi utrinque profunde striato ; 

 elytris oblongo-ovatis, profunde striatis, interstitio tertio 

 punctis tribus impressis. 

 Mas. abdominis segmento ultimo lineola acute elevata. 



