196 Memoirs on the Coleoptera 



strongly dilated. Length (cf ) 17.6 mm.; width 6.6 mm. Florida 

 (locality not indicated) sulcatus Csy. 



Striae much less coarse, only feebly impressed, the intervals almost flat 

 (9), very feebly convex (cf), alternating in width in both sexes 

 through about inner half of the width; scutellar stria wholly want- 

 ing. Body subparallel (cf), broader and more ventricose (9), 

 black, the legs more piceous, polished throughout (cf ), the elytra 

 of the female opaque; surface rather strongly convex; head mod- 

 erately large, slightly larger in the female, about three-fifths as wide 

 as the prothorax; eyes prominent, the anterior sulci short, slightly 

 diverging; mandibles as in the preceding; maxillary palpi rufous, 

 the last joint rather broadly truncate; antennae not quite as long 

 as the head and prothorax, the latter nearly two-fifths wider than 

 long, the transverse impressions subobsolete, the median stria 

 more widely impressed near basal fourth; foveae elongate, very 

 deeply concave and feebly rugose, the outer ridge adjacent to the 

 margin and rather thin; apical incised line fine and only visible 

 laterally; elytra oblong-oval, nearly two-thirds (cf ) or one-half (9 ) 

 longer than wide, a fifth (cf) to a third (9) wider than the pro- 

 thorax; punctures of the striae moderate in size, deep and rather 

 close-set, obsolescent apically, the striae however notably distinct 

 throughout; anterior male tarsi pale rufous, the first three joints 

 rather strongly dilated and subequal in width. Length (cf 9 ) 

 17. 2-18. 3 mm.; width 5.9-7.0 mm. Iowa (Keokuk). 



altemans n. sp, 



7 — Larger species, the sides of the prothorax rapidly arcuately oblique 

 only well behind the middle 8 



Small species, the thoracic sides finely reflexed, more gradually oblique 

 posteriorly from well before the middle, the sinus before the basal 

 angles still shorter <t 10 



8 — Sides of the prothorax very evenly, circularly arcuate from apex to 

 the short basal sinus. Body narrow, moderately convex, black, the 

 legs and under surface rufo-piceous; surface shining, the elytra 

 alutaceous but not densely opaque in the female; head rather large, 

 elongate, somewhat more than three-fifths as wide as the prothorax, 

 with unusually small and only moderately prominent eyes; anterior 

 sulci distant, nearly parallel; mandibular furrows coarse, the last 

 palpal joint shorter than the third, rather slender but widely trun- 

 cate; antennae not as long as the head and prothorax, the latter a 

 third wider than long, the sides narrowly reflexed, the short basal 

 sinus shallow, the short sides thence to the rather obtuse basal 

 angles converging and not parallel; apical incised line visible 

 laterally, close to the apical margin; stria deeper at basal fourth; 

 transverse impressions obsolescent, the sparse rugulae very feeble 

 or obliterated; foveae moderate, rather short, irregular, the concave 

 bottom with distant transverse rugulae; obtuse outer ridge adjacent 

 to the margin; puncture at the angles coarse, forming a slightly 

 elongate groove; elytra oblong-oval and three-fourths longer than 

 wide, only about a fifth wider than the prothorax, very gradually 

 ogival behind, with short feeble sinus; striae moderate, slightly 



