132 Trans. Acad. Sci. of St. Louis. 



deep rounded basal impression occupying from about a half to a third 

 the entire length of the tergite, the fourth with a very feeble concavity 

 toward base, having a prominent basal margin but without the same 

 character of depression as the first three, the impressions all rather more 

 coarsely punctured than the remainder of the surface; legs rather long 

 and slender. Atlantic districts of America Echochara 



Body stouter but equally convex, the integuments finely punctate, some- 

 what alntaceous iu lustre, the abdomen polished; mesosternal process 

 narrow but with the apex subtruncate, extending posterially much further 

 than usual in this group and attaining fully apical fifth of the acetabula 

 and almost the end of the coxae, the tip extending to the moderately 

 produced and parabelically rounded reetasternal projection without 

 longitudinal discontinuity; head rather small, parallel and somewhat 

 arcuately inflated behind the moderate and slightly prominent eyes, 

 abruptly narrowed at the extreme base; frontbroadly arcuato-truncatej- 

 palpi normally slender, the antennae well developed, with the second 

 and third joints much elongated; prothorax subparallel, mu*.h more 

 arcuate at base than In Echochara, with the basal aogles obtuse and 

 more rounded; elytra not sinuate at tip externally; abdomen .-'lightly 

 narrowed from base to the tip of the fifth segment, the impressions all 

 unusually narrow and shallow, that of the fourth tergite very feeble, all 

 more finely but more perforately punctate than the remainder; legs 

 rather short and slender. Europe *PoIystomota 



15 — Form somewhat narrow and depressed, parallel, the sculpture sparse; 

 mesosternal process extending to apical fourth of the coxae, moderately 

 narrow, the tip truncate and fully attaining the apex of the unusually 

 elongate metasternul projection; head well developed, oi'bicular, the 

 eyes well developed, the neck but little more than two-thirds as wide 

 as the head, the antennae moderate, gradually incrassate, with the 

 elongate second and third joints subequal; prothorax subparallel, with 

 obtuse and slightly rounded though distinct basal angles, the hypo- 

 mera almost as fully visible from the sides as in Maseochara and ex- 

 tending to the apex; elytra moderately developed, not in the least 

 sinuate laterally at tip, the external angles rounded; abdomen with the 

 first three tergites rather broadly, feebly and decreasingly impressed at 

 base; hind tarsi short, nearly as in Emplenota, the first four joints sub- 

 equal or with the first very slightly longer than the second. Sonoran 

 regions Piiinlochara 



Form rather stout, convex, alutaceous in lustre, the punctuation fine and 

 very close throughout, including the abdomen; mesosternal process 

 rather narrow but not strongly acuminate, flat, the apex arcuato- 

 truncate, not attaining the very short and broadly rounded meta- 

 sternal projection by a short deep longitudinal discontinuity; head 

 rather small, feebly narrowed behind the somewhat prominent 

 eyes, the front broad, feebly, evenly declivous to the apex; palpi 

 somewhat short and thick; antennae moderately well developed, stout 

 and somewhat compact, the second and third joints elonsate, the 

 fourth short, transverse and much shorter than the fifth as usual; pro- 

 thorax unusually transverse and narrowed from base to apex, with the 

 base broadly arcuate and the angles distinct; elytra large, each dis- 



