i yo MEMOIRS ON THE COLEOPTERA 



perfectly sculptureless; elytra large, nearly a fourth longer than wide, 

 with arcuate sides, widest slightly behind the middle and fully a 

 fourth wider than the prothorax, very obtuse at apex; three discal 

 geminate series of small close-set punctures feebly impressed, the 

 included surfaces feebly convex, the lateral geminate series less 

 denned, of finer and sparser, feebler punctures; flat interspaces 

 with sparse and confused punctures, which do not approach closely 

 to the geminate series; pygidium (cf ) finely, densely scabriculate in 

 basal, polished and with coarse sparse punctures in apical, half, 

 everywhere with minute sparse erect hairs; hind tarsi distinctly 

 shorter than the tibiae: anterior tarsi with the claw-joint scarcely at 

 all dilated, slender and but feebly sinuate beneath, the larger claw 

 smaller than usual, extremely bent near the base, the smaller ramus 

 not very fine, a little shorter than the larger, which is symmetrically 

 and axially pointed at apex. Length (cf ) 19.8 mm.; width 10.4 mm. 

 Nicaragua (Castillo) *obtusus n. sp. 



Elytral punctures generally not so small but shallow and annulate, the 

 annuli open behind; anterior claw-joint of the male dilated and 

 strongly bent as usual and in part densely strigilate beneath like 

 the soles of the third and fourth joints, the larger claw more de- 

 veloped and less abruptly bent near the base, these tarsal characters 

 merely surmised in the case of bitumorosiis, the type of which is a 

 female 10 



10 Form oblong-oval, rather stout, moderately shining, deep black, the 

 under surface and legs barely less black; head scarcely more than 

 half as wide as the prothorax, subsimilar throughout sexually, 

 rather strongly but not closely punctate, sometimes less so 

 along the median line; clypeus trapezoidal, with feebly sinu- 

 ato-truncate apex and thick, feebly elevated, interiorly sharp 

 margins, very variably punctate, sometimes rather strongly 

 but never closely throughout, occasionally almost completely im- 

 punctate, excepting a few fine punctures basally; prothorax three- 

 fourths to four-fifths wider than long, the sides broadly and moder- 

 ately rounded and feebly converging from the moderately rounded 

 basal angles to the apex; punctures sparse but generally rather 

 strong and deep throughout; scutellum ogival, smooth; elytra about 

 a fourth longer than wide though varying in width, only very little 

 wider than the prothorax, the apex broadly rounded but not very 

 obtuse; sides (cf ) feebly arcuate and even, the greatest width some- 

 what behind the middle, or ( 9 ) distinctly and arcuately prominent 

 a little behind the middle; on each, four smooth and feebly convex 

 costules are inclosed by feebly impressed series of extremely close-set 

 punctures, the interspaces with sparse confused punctures of the 

 same kind, generally a little stronger near the suture; pygidium (cf ) 

 opaque and extremely densely, finely and evenly scabriculate 

 throughout, or ( 9 ) similar but with two feeble subapical elevations, 

 on which the sculpture becomes very irregularly and intricately 

 smooth; hind tarsi not quite as long as the tibiae, not differing much 

 sexually. Length (12 cf , 29 9 ) 13.5-18.5 mm.; width 7.0-10.0 mm. 

 Long Island to the Carolinas and westward to Louisiana, Oklahoma 



