20 AMKRICAN COLEOPTERA. 



9. Elongate, black, above greenisli or bronzed 'J,, nearly black ?; tliorax one- 

 half wider than long, as wide at base as apex, slightly narrower than 

 the elytra; posterior tarsi with the first joint grooved on the outer 

 side; femora piceous, tibiae and tarsi rufopiceous. Length .40-.52 

 inch 19. hsematopa Dej. {fimilis Kby.). 



1. A. pteroititicliina n. sp.— Elongate, feebly convex, the elytra slightly 

 flattened on the disk. Color black, shining. Head as wide as the thorax at 

 apex; frontal grooves deep, punctiforni, not extending forward on to the epis- 

 tonia; antennte slender, slightly shorter than the head and thorax, piceous, the 

 first three joints slightly paler; palpi rufopiceous. Prothorax subcordate, rather 

 more than one-half wider than long, distinctly narrower at base than apex, 

 coarsely punctate at base and apex, more densely at base; apex truncate, the 

 anterior angles rounded, not prominent; transverse impressions distinct; median 

 line distinct, abbreviated in front; basal impressions broad, deep, obsoletely 

 bifoveate; base truncate; sides with the margin narrowly reflesed, strongly 

 arcuate, suddenly and strongly sinuate a short distance in front of the hind 

 angles, which are subacute, prominent and rather finely carinate. Elytra rather 

 more than one-half longer than wide, scarcely wider than the thorax, sub- 

 parallel, deeply striate ; strife entire, distinctly punctate lo behind the middle, 

 the scutellar stria long, the eighth with the row of ocellate punctures widely 

 interrupted at middle; intervals feebly convex. Body beneath piceous or nearly 

 black; sides of prosternum coarsely punctured; metasternal epistoma impunc- 

 tate. Legs piceous; middle and hind fenioia with two setigerous jmnctures 

 along the inner margin; middle and posterior tarsi with the three basal joints 

 deeply grooved on the outer side. Length .57-. 62 inch ; 14.25-15.5 mm. 



In the inale.s the middle tibite are les.s strongly bidentate than 

 usnai, the teeth being much smaller and situated nearer the ajjex 

 than in most species, while the lower tooth is usually slightly more 

 prominent than the upper. 



The grooves on the middle and hind tarsi observable in this and 

 the next species, and less markedly in some of our other Cyrtonoti, 

 recall a similar structure seen in many species of Pterostichus ; the 

 grooves not being double, however, as in the latter genus. The 

 coarse punctuation at the sides of the prosternum seems unique. In 

 facies it beai-s a strong resemblance to certain Pterostichi. 



I have carefully compare*! it with the description of Cnrtonotutf 

 puizeysi Bates (Proc. Zool. Soc, 1878, p. 600) from Mexico. The 

 latter is described as having the middle tibije without teeth on the 

 inner side in the male. These, although small and inconspicuous, 

 are, however, pre.-^ent in pterostichina. The two species difler also 

 in size, and the present one posesses several characters of importance 

 not mentioned in the description oi' puizeysi. 



It may pcrhiips l)e well to note in passing, that, unle.<s Cijrtcnotus 



