1865.] 



381 



Descriptions of several new species of North American COLEOPTERA. 

 BY JAMES H. B. BLAND. 



(Communicated April lOth, 1865.) 



The insects described in the present paper were collected during the 

 past year in Colorado Territory, by Mr. James Ridings, and presented 

 by him to the Society. 



Pterostichus inornatus n. sp. 

 Body black; head glabrous, furnished with several long, erect, brown- 

 ish hairs ; two deep impressions above the base of the mandibles ; la- 

 brum rugose, coarsely and deeply punctured on the lateral and anterior 

 margins; a long brown hair proceeding from each puncture; mandibles 

 piceous, palpi chestuut-brown ; antennae piceous, clothed with prostrate 

 fulvous pubescence, and long, erect, fulvous hair. Thorax widest in 

 front of the middle, narrowed slightly to the anterior margin, and nar- 

 rowed posteriorly to three-fourths the width of the elytra, obsoletely 

 rugose; a curved transverse line near the anterior margin; central lon- 

 gitudinal line deeply impressed, becoming obsolete before reaching the 

 margins; a deep puncture near the posterior angles, a deep longitudi- 

 nal depression extending about one-third of the length of the thorax, 

 between the central line and the lateral margin. Elytra striated, punc- 

 tures of the striae obsolete ; interstices convex, closely and minutely 

 punctured ; second striae from the lateral margin coarsely and irregu- 

 larly punctured ; closely punctured near the tip ; beneath piceous, 

 minutely punctured; anterior tibiae furnished with several rows of up- 

 right, fulvous bristles, those on the posterior tarsi somewhat prostrate. 

 Length 6 to 7 lines. 



Pterostichus agrestis n. sp. 

 Body black, shining; head furnished with a few long, fulvous hairs; 

 antennae dark brown, clothed with fulvous pubescence; mandibles 

 black; palpi dark brown. Thorax smooth, widest in front of the mid- 

 dle ; sides rounded to near the posterior angles ; a deeply impressed 

 longitudinal line; thorax deeply impressed near the posterior angles, 

 the impression closely and rugosely punctured, the punctures extending 

 across the base. Elytra striated, striae regularly punctured; interstices 

 flattened, second lateral stria coarsely punctured at the rounding to the 

 tip. Beneath black; head, prothorax and side pieces of the meso- and 

 nietathorax opaque, rugosely punctured; meso- and metapectus shining. 

 Legs dark brown, minutely punctured. Length 5i lines. 



