270 MEMOIRS ON THE COLEOPTERA 



long and slender. Length (cf 9 ) 6.5-7.4 mm.; width 2.7-3.0 mm. 



Arizona (probably Apache Co.) apachensis Csy. 



Elytral striae distinctly impressed in both sexes. Body broader and rela- 

 tively shorter than in the preceding, convex, piceous-black in color, 

 highly polished in both sexes, the elytra not at all alutaceous in the 

 female; under surface not paler, the legs rufous; head distinctly 

 more than half as wide as the prothorax, with well developed but 

 only moderately prominent eyes, the strioles straight, clear-cut and 

 oblique; antennae ferruginous, slender, extending behind the tho- 

 racic base; prothorax relatively small but broader, three-fourths to 

 four-fifths wider than long, the sides evenly and strongly arcuate, 

 rather strongly reflexed; apex fully three-fourths as wide as the base, 

 broadly though distinctly sinuate, with broadly blunt angles; basal 

 impression distinct, the other obsolete, the stria fine, not entire; 

 hind angles, basal punctuation and foveae nearly as in the preceding; 

 elytra shorter and more inflated, two-fifths longer than wide, a fifth 

 wider than the prothorax, the sides broadly arcuate; striae fine but 

 deep, evidently to obsoletely punctulate, the scutellar moderately 

 long, widely free behind as a rule; intervals very moderately (cf) -to 

 rather strongly (9 ) convex. Male prosternum with a shorter and 

 more rounded, usually unimpressed central area, which is more 

 densely punctate than in apachensis, the punctures of the pairs at 

 the abdominal apex less approximate. Length (cf 9 ) 7.0-7.8 mm.; 

 width 3.2-3.35 mm. Arizona. Five examples patula n. sp. 



The species above described under the name brunnescens, appar- 

 ently cannot be founded upon one of the Colorado series identified 

 as brunnea Gyll., by Horn, for the pronotum is said by the latter 

 author not to be deplanate posteriorly at the sides in his specimens, 

 the prothorax only a third wider than long and the mentum tooth 

 acute. There is, however, a faint trace of an oblique elevation at 

 the outer side of the outer fovea, but less pronounced than in sev- 

 eral other unrelated species, such as definita, obligata or nupera, 

 where the mentum tooth is distinctly bidenticulate as usual. 



The above description of chalcea is founded upon a form which 

 seems to represent the species, but I doubt that it can really be 

 the one described by Dejean, for the upper surface has but slight 

 metallic lustre, so that the name chalcea seemingly could not have 

 been given it*by any systematist of Dej can's sense of fitness. When 

 living this species exhales a very strong odor of the Pterostichid 

 order. 



The species described in the table above as corvina, having only 

 one puncture at each side of the abdominal apex in the male, ought 

 to be related to robustula Horn, from California, but the two are 



