Casey — Observations on the JStapJiylinidae. 131 



12 — Abdomen Trith the first four tergites impressed at base, successively 



less strongly, the surface more or less sparsely and finely punctate... IS 

 Abdomen with the first three tergites impressed at base, the fourth and fifth 



not at all impressed, the impressions nairow, deep and subequal except 



in Pinalochara 15 



Abdomen with the first two tergites alone impressed at base, the impressions 



rounded, deep and subtqual 16 



13 — Posterior tarsi shorter, the basal joint frequeutly but little longer than 



the second; body depressed. Form parallel, the integuments in great 

 part opaque and with inconspicuous punctures nearly as in Maseochara; 

 mesosternal process truncate to acute, separated from the angulate apex 

 of the distinctly produced metasternum by a short depressed longitudi- 

 nal dii^coDtinuity; head rather large, parallel behind the very moderate 

 and somewhat prominent eyes, the palpi rather short and thick; front 

 broadly subtruncate ; antennae well developed ; prothoraxbroadly arcuate 

 at ba^e, subparallel at the sides, the basal angles more or less distinct; 

 elytra well developed, not siuuate at tip externally; abdomen parallel, 

 with the basal impressions impuuctate, the punctures elsewhere fine 

 and sparse. Cosmopolitan. [= Polystoma || Auct.] Emplenota 



Posterior tarsi longer, the basal joint greatly elongated, equal to the next 

 three combined or nearly so ; body normally convex 14 



14, — Body parallel, rather large in size, the integuments polished almost 

 throughout, the punctures fine and not very conspicuous, very sparse on 

 the abdomen ; mesosternal process very narrow, gradually and very 

 finely pointed, separated from the metasternum, which is very broadly 

 rounded and does not enter the intercoxal space, by a very long deep 

 longitudinal discontinuity; head well developed, parallel, somewhat 

 swollen at the sides behind the moderate and slightly prominent eyes, 

 the front obtusely acgulate, the palpi normally long and slender ; anten- 

 nae well developed, the second and third joints much elongated; pro- 

 thorax subparallel, the base arcuate, the angles obtuse and rounded; 

 elytra well developed, each distinctly sinuate at tip externally; abdomen 

 narrowed toward tip behind the middle, the impressions deep, rounded 

 and unusually large, involving the greater part of each tergite, except 

 the fourth, the fifth unimpressed, the impressions more coarsely punc- 

 tate than the remainder; male sexual characters evincing themselves 

 by a tubercle on the basal one or two and fifth tergites, the under surface 

 of the second and third sometimes broadly excavated at base except 

 near the sides; legs rather short, moderately stout, the tibiae somewhat 

 closely setulose. Europe * Ceranota 



Body narrow, parallel, convex, the integuments finely punctate, slightly aluta- 

 ceous, the abdomen polished; mesosternal process extremely narrow, 

 gradually and acutely pointed, just attaining the acutely acgulate apex of 

 the pronounced metasttrnal projection without longitudinal discontinuity 

 but on a higher level — viewed ventrally; head moderate, parallel and 

 arcuate behind the rather small eyes, rapidly narrowed at the extreme 

 base, the palpi slender; front angulate; antennae well developed; protho- 

 rax subparallel, unusually feebly arcuate at base, the angles obtuse but 

 distinct; elytra only very obsoletely sinuate externally at tip; abdomen 

 narrowed slightly toward tip, the first three tergites each with a large 



