240 LECONTE— SYNOPSIS OF PTEROSTICHUS. 



sions not deep, dorsal line entire ; base subsinuate, margined ; basal impressions linear, 

 short, single. Elytra elongate, not wider than the thorax, moderately convex; striae 

 moderately deep, impunctured, scutellar stria very short, interstices almost flat ; 

 marginal series of punctures not interrupted, humeri much rounded. 



b. 



This group contains but a single species having the same form of body as those 

 without dorsal punctures, but differing in having the second stria marked posteriorly 

 with two punctures. The striae are very deep, and the margin posteriorly has a slight 

 elevation, which is the last remnant of the space between the two outer marginal striae 

 which distinguish the first division of the genus. The thorax is narrowed behind, 

 with the posterior angles sharp ; finely margined on the sides ; the base is slightly 

 margined each side, the basal impression is single and deep ; the antennae are 

 moderate as in the preceding groups ; the body is without wings, and the parapleurae 

 are short ; the first joint of the abdomen is scarcely impressed, and is moderately 

 punctured ; the outer marginal furrow of the tarsi is deep. 



18. P. lachrymosus, thorace latitudine subbreviore, postiee angustato lateribus late rotundatis, angulis 

 posticis obtusis, impressionibus basalibus profundis subrugosis, elytris paulo latioribus, profunde striatis, 

 bipunctatis, interstitiis convexis. Long. -6. 

 Feronia laclirymosa Newman, Ent. Mag. 5, 386. 



Southern States, rare. The anterior transverse impression of the thorax is deep ; 

 the elytra are but little convex. 



This group contains but a single apterous species of moderately slender and 

 depressed form, with trapezoidal thorax finely margined on the sides, with sharp 

 posterior angles and single linear basal impressions. The elytra have the seventh 

 stria indistinct anteriorly, and very deep posteriorly ; the dorsal punctures are three, 

 the two posterior being in the second stria. The scutellar stria is very distinct. 

 This species has a strong relation to those of group (i) but differs essentially by its 

 short parapleural ; the mentum tooth is short and scarcely emarginate. 



19. P. lubricus, nitidus, thorace latitudine non breviore, postiee angustato, lateribus rotundatis non 

 sinuatis, basi utrinque profunde impresso, elytris vix latioribus, striatis, 3-punctatis, stria 7 ma apice valde 

 exarata. Long. -35. 

 This pretty little species is found in the upper part of Georgia. The male has the 



last ventral segment widely excavated, and armed anteriorly with a prominent acute 



dentiform tubercle. 



d. 



Two oblong elongate species, quite anomalous by the position of the second dorsal 

 puncture in the third stria, while in all the rest it is in the second stria. The 



