LECONTE— SYNOPSIS OF PTEROSTICHUS. 247 



40. P. moestus, thorace latitudine subbreviore, postice valde angustato, lateribus antice paulo rotun- 

 dato, angulis posticis rotundatis, margine reflexo postice latiore, basi utrinque late profunde foveato et 

 punctulato, elytris minus convexis paulo latioribus, profunde striatis, 4-punctatis. Long. -68. 



Feronia moesta Say, Trans. Am. Pbil. Soc. 2, 42. 



Feronia superciliosa Say, Journ. Ac. Nat. Sci. 3, 144. 



? Feronia relic ta Newman, Ent. Mag. 5, 387. 



Pennsylvania and Lake Superior. Newman mentions but three dorsal punctures, 

 but as one of my specimens has only three on one side, I am inclined to think 

 that the synonym is correct. So far as his very uncharacteristic description goes, 

 it agrees well with the present species. 



1. 



One apterous species from far northern regions, having a quadrate thorax but little 

 narrowed behind, with the reflexed margin wider towards the base, the basal impres- 

 sions large, without striae, and the basal angles obtuse ; the elytra very little wider than 

 the thorax, with the striae deep, irregularly broken and twisted, so as to make the 

 second, fourth, sixth and eighth' spaces wider than the others and somewhat catenate. 

 The parapleural are moderate, the first joint of the abdomen scarcely impressed ; the 

 outer tarsal grooves deep. The male has the last joint of the abdomen excavated as 

 in the preceding species. 



41. P. punctatissimus, pernitidus, thorace subtransverso, postice subangustato, lateribus paulo 

 rotundatis, margine reflexo postice latiore, basi utrinque late profunde foveato et punctato, elytris paulo 

 latioribus, striis profundis, undulatis, interstitiis alternatim latioribus interrupts et foveatis. Long. -57. 



Feronia (Pterost 'ickus) punctatissima Randall, Boston Journal Nat. Hist. 2, 3- 



North shore of Lake Superior, not common. Mr. Randall's specimen came from 

 the mountains of Maine. By comparison with the fragments of the original specimen, 

 I have convinced myself of the identity of the Lake Superior species. 



m. 



Three apterous species placed in the division Abax by Dejean, but differing 

 essentially from the European species by having dorsal punctures and only a single 

 exterior marginal stria. The body is elliptical, not convex, the thorax narrowed in 

 front, the lateral margin very narrow at the anterior angles, becoming wide and 

 depressed posteriorly ; the basal impressions double, separate, with a slight elevation 

 between the outer one and the margin. The elytra are deeply striate, with three 

 dorsal punctures in the usual situation. The parapleurae are very short, the first 

 joint of the abdomen with a very strong impression ; the outer tarsal grooves scarcely 

 distinct. Antennae short, slender. The last ventral segment of the males is simple. 



42. P. fallax, nitidus, thoracis margine impunctato, elytris profunde striatis, tripunctatis, interstitiis 

 convexis, abdominis lateribus impunctatis. Long. -65. 



Feronia (Abax) fallax Dej. Sp. Gen. 3, 321. 



