AMERICAN COLEOPTERA. 127 



Perlgona is Somoplatus. Finally the same genus has been redeseribed 

 by Morawitz as Pentoplogenius, (determined by Leeonte). Until the 

 synonymy is finally settled the name TrecMcus nigriceps (Dej.) will 

 be retained. 



T. pallipennis Lee. does not appear to differ specifically from the 

 above. 



AMARA Bon. 

 A. rejiecca Putz. Three specimens of this species sent by Putzeya 

 and Chaudoir are identical with lacustris Lee, the latter being accord- 

 ing to Dr. Leeonte the rufimnna Kirby. 



A. ohtusa Lee, does not appear to differ essentially from liyperhorea 

 Dej. In the type of the latter is seen a fine basal line near the hind 

 angles which is not evident in the former. 



The species included in the division Amara (Proc. Ac. 1855, p. 

 346) may be known by the following table : 

 A. — Autennce not carinate. 



Prosternum % with a large and moderately deep puncture. 



Base of thorax puuctured insignis Dej. 



Base of thorax smooth ilisulai'is n. sp. 



Prosternum % without puncture. 



Scutellar stria terminating in ocellate puncture. I -?"-P'"**-***^^'** ^^'^' 



littoralis Esch. 

 Scutellar stria without ocellate puncture. 

 StrisB of elytra punctured, base of thorax finely punctate..basillaris Say. 

 Strias not or only obsoletely punctured, base of thorax smooth. 

 Thorax broad, moderately deeply emarginate in front. 

 Thorax narrowing from basal angles to apex, form broad robust, termi- 

 nal spur of anterior tibiae stouter than usual crassispiua Lee, 



Thorax narrowing from in front of base, form oblong oval, sjjur normal. 

 Legs piceo-rufous ; hind angles of thorax slightly obtuse, the punc- 

 ture rather distant from the side margin cupre.lata Putz. 



Legs black; hind angles sharply rectangular, the puncture equi- 

 distant from basal and lateral margins couflata Lee. 



Thorax but little wider than long, apex very feebly emarginate, basal 



angles sharply rectangular brnuuipes Motsch. 



B.— Antennae with joints 2 — 3 carinate above. 



Scutellar stria with ocellate puncture Tallax Lee. 



Scutellar stria without ocellate puncture. 

 Basal impressions of thorax very faint. 



Striae obsoletely jjunctured, base of thorax subpunctate. 



subpuuctata Lee. 

 Striae impunctured, thorax not punctured. 



Form rather broadly oval confu!^a Lee. 



Form oblong oval protensa Putz. 



Basal impressions well marked polita Lee. 



A. inepta Lee. appears to be a female of (^Celia) erratica. 

 A, convexa Lee. is a female of imlita. 



