DYNASTIN.E 215 



teriorly, barely visibly wider behind than before the middle, each 

 with seven moderate and subequally spaced, slightly impressed 

 striae, having well separated shallow punctures, the flanks with widely 

 dispersed, smaller, more confused punctures; pygidium (cf) strongly 

 convex, minutely scabriculate, becoming smooth and unevenly, not 

 sparsely punctulate medially and with a deep foveiform concavity 

 at each end, or ( 9 ) less scabriculate, more distinctly and sparsely 

 punctate medially and apically, less convex and without the lateral 

 foveae; hind tibiae notably slender and, in both sexes, longer than the 

 tarsi. Length (cf 9 ) 12.3-14.0 mm.; width 7.0-8.2 mm. Wisconsin 

 (Bayfield) and from an unrecorded locality. Arkansas, Say. 

 [Scarabtzus tridentatus Say] tridentatus Say 



Body similarly convex but more elongate and a little more shining, black, 

 the under surface and legs dark red-brown; head scarcely a third 

 as wide as the prothorax, with very coarse but shallow, irregular 

 rugulosity throughout, the transverse carina wholly obsolete; 

 clypeus trapezoidal, short, the reflexed anterior carina fully half as 

 long as the width at base, the teeth obtuse; side margins very finely 

 reflexed; prothorax less than one-half wider than long, the sides rather 

 feebly converging, evenly and not strongly arcuate from base to 

 apex, the basal angles right and well defined, not rounded, the apices 

 merely somewhat blunt; apex circularly sinuate, the base moder- 

 ately lobed medially; punctures small and very sparse in about basal, 

 somewhat stronger and less sparse in apical, half, larger toward the 

 sides, especially so and closer anteriorly; median line with but few 

 punctures; scutellum narrow as usual and longer than wide, ogival, 

 smooth, feebly concave; elytra fully a fifth longer than wide, a 

 fourth wider than the prothorax and more than twice as long, 

 parallel, with almost evenly arcuate sides, the apex rapidly very 

 obtusely rounded; discal striae seven, with two finer sublateral, 

 the striae broadly and distinctly impressed, with moderate, distant, 

 annulate punctures, the second interval alone with an irregular series 

 of coarse punctures, which have the enclosed annuli extremely 

 small; pygidium very transverse, three times as wide as long, shining, 

 blackish, finely scabriculate toward the ends and along the base, 

 elsewhere finely and sparsely punctate, the lower beading widely 

 interrupted at the middle, the abdominal very broad laterally but 

 everywhere feebly defined and wholly obsolete at the middle; 

 legs rather long and slender; male more inflated posteriorly than 

 the female. Length (9 d 71 ) 14.5-15.5 mm.; width 8.1-9.5 mm - 

 Maine (Monmouth), C. A. Frost elongatus n. sp. 



4 Color deep black throughout above when mature, the under surface 

 piceo-rufous; legs nearly black, long and rather slender 5 



Color always pale red-brown, or at least in part rufo-piceous when 

 mature 6 



5 Pygidium in both sexes smooth, polished, feebly but not very sparsely 

 punctate, minutely and feebly scabriculate near the ends and along 

 the base; head and clypeus nearly as in the preceding, only the female 

 having a very fine feeble median vestige of the transverse ridge; 

 prothorax less than one-half wider than long, more trapezoidal, the 



