5o MEMOIRS ON THE COLEOPTERA 



fossae deeply rugose; median fossa deep, broadly impressed, acute 

 along the bottom and extending from apex nearly to the base; 

 scutellum impressed and rugulose along the middle, elsewhere sculp- 

 tureless; elytra fully a fourth longer than wide and more than 

 three-fourths wider than the prothorax, cuneiform, the lateral edge 

 and next costa inflated basally, the humeri much exposed basally, 

 rounded, tumid and polished, the costse strong, smooth, about 

 thirteen in number, the intervals sulciform and equal to the costse, 

 only very minutely, transversely marked at the bottom; pygidium 

 having unusually little slope, convex, very tumid at tip, the apex 

 rapidly and deeply convex to the lower margin, the transverse 

 scratches rather coarse, deep and interlacing but not very close; ante- 

 rior tibiae with the external tooth obtuse but rather large, the posterior 

 longer than the femora or tarsi, almost evenly, gradually thickened 

 from base to apex. Length (9) 13.5 mm.; width 6.3 mm. Hon- 

 duras (San Pedro Sula) *aterrima n. sp. 



Head coarsely and closely punctate near the base as usual and densely 

 and more or less coarsely punctato-rugulose throughout elsewhere, 

 the eyes similarly small and not in the least prominent, but with 

 smaller and less elevated anterior canthus, the clypeus always 

 trapezoidal, with less parallel sides and more broadly rounded 

 angles; short transverse lines at the bottom of the elytral sulci con- 

 fused and indefinite in pimalis and prolixella 3 



3 Pygidium moderately sloping, at an angle of about 45 4 



Pygidium much more nearly vertical 6 



4 Scutellum closely and rather strongly punctate; prothorax shorter, 

 transverse. Body subrhombiform, shining, black, the head near 

 the eyes and the sides of the pronotum bright metallic cupreous to 

 green; elytra pale, with black ridges; legs black, the hind femora 

 opalescent, testaceous, black beneath; head moderate, the clypeus 

 barely twice as wide as long, almost semi-elliptical, the surface 

 flat, the edges throughout moderately though distinctly reflexed; 

 prothorax two-fifths wider than long, the apical angles prominent 

 and acute, the basal broadly rounded; basal bead entire but finer 

 medially; surface sparsely and moderately punctate anteriorly and 

 laterally; punctures fine, very feeble and sparse elsewhere, the 

 median sulcus obsolescent near the apex and gradually toward 

 base, the two lateral fossae deep and large, the intermediate external 

 impression not distinct; elytra slightly elongate and moderately 

 cuneiform, the ridges equal and rather sharply convex, the sulci very 

 distinctly, transversely lineate at the bottom, becoming unusually 

 distinctly punctate laterad, the outer margin very moderately 

 thickened basally; pygidium with the transverse interlacing lines 

 unusually close-set, in profile rapidly descending to the lower margin 

 apically; external tooth of the anterior tibiae extremely feeble and 

 obtuse and at a much greater distance from the apex than in the 

 preceding, the hind tibiae similar in shape but not so long or thick, 

 barely at all longer than the femora. Length (9) 10.4 mm.; 

 width 4.4 mm. Mexico (Cuernavaca, Morelos), Wickham. 



*mediocris n. sp. 



