DYNASTIN^: 197 



except toward base and apex, the surface throughout very finely, 

 sparsely punctulate, more closely and unevenly at the lateral ex- 

 tremities; hind tibiae nearly as in gibbosus; last abdominal segment 

 of the female almost smooth, having only a few very fine, irregularly 

 dispersed punctures. Length (9) 14.3 mm.; width 8.4 mm. 

 Northern Atlantic region laticauda n. sp. 



10 Elytra (cf ) very short, about as wide as long as a rule and unusually 

 inflated behind. Body stout, shining, paler rufous beneath; head 

 fully two-fifths as wide as the prothorax, finely, densely scabrous, 

 smooth at base, the carina fine and acute, not at all sinuate medially, 

 separated from the sides by a wide interval; clypeus finely, very 

 densely scabriculate throughout, more sparsely in the female, the 

 teeth small, slender; prothorax about three-fourths wider than long, 

 the sides nearly straight and feebly converging to beyond the middle, 

 there broadly rounded and thence strongly converging to the apex; 

 basal angles moderately broadly rounded; punctures very moderate 

 in size, shallow, abrupt, rather close-set anteriorly, gradually be- 

 coming very remote basally toward the sides; pit rather shallow, 

 sparsely punctate, the tubercle obtusely and broadly triangular; 

 scutellum generally with a central fovea; elytra posteriorly almost a 

 third wider than the prothorax in the male, less in the rather more 

 elongate elytra of the female, broadly rounded at apex; series rather 

 sulciform; punctures somewhat coarse, toward the sides coarse, 

 closer and confused except basally, becoming much finer apically and 

 intermingled laterally with small sparse punctures; pygidium shining, 

 the punctures small but distinct, not very sparse except medially 

 toward tip, subrugulose at the sides; hind tibiae rather slender; last 

 ventral (9 ) finely, rather closely punctulate, with a few fine punc- 

 tures also at the middle of the penultimate segment. Length 

 (3 cf, i 9) 12.6-15.0 mm.; width 7.7-9.2 mm. Texas (Austin), 

 Iowa (Cherokee) A. D. W. and Indiana laetulus n. sp. 



Elytra oblong or oval, not much inflated behind, not greatly exceeding 

 the prothorax in width and distinctly elongate II 



II Body oval in form, very convex, polished and strongly sculptured. 

 Head nearly two-fifths as wide as the prothorax, strongly rugose, 

 smooth and finely, sparsely punctate basally, the carina very fine 

 along the crest, not sinuate medially and far removed from the sides; 

 clypeus very short, concave longitudinally, feebly sculptured, the 

 teeth small, acute and approximate; prothorax two-thirds wider 

 than long, the sides converging from the broadly rounded basal angles 

 to the apex but having, beyond the middle, a broadly arcuate point 

 of flexure; punctures coarse, sparse, deeply impressed, smaller toward 

 the sides; anterior pit deep and well developed, the tubercle strong, 

 broadly triangular; scutellum smooth, with a few minute punctures; 

 elytra but slightly longer than wide, parallel and broadly arcuate 

 at the sides, obtusely rounded at apex, a sixth wider than the pro- 

 thorax and more than twice as long, the punctures arranged as 

 usual but not close-set, coarse, deeply impressed and very con- 

 spicuous, confused but rather coarse even on the apical declivity, 

 each puncture enclosing a rather large annulus; pygidium polished, 



