102 MEMOIRS ON THE COLEOPTERA 



strongly convex and generally wholly devoid of punctures. Body 

 black above and beneath, the epipleura more or less piceo-testaceous, 

 the antennae and trophi pale, shining, the elytra (9) alutaceous; 

 head very moderate, distinctly less than three-fifths as wide as 

 the prothorax, the eyes prominent and the antennae slender; pro- 

 thorax transverse, fully one-half wider than long, the sides rounded, 

 less so basally, the apex deeply sinuate and much narrower than the 

 base, which is transverse, the bead generally feeble or interrupted 

 medially, the angles unusually broadly rounded; surface finely re- 

 flexed at the sides anteriorly, the gutter gradually wider and shal- 

 lower posteriorly, disappearing near basal fourth on the latero- 

 basal convexity; foveae distinct, moderately impressed and with a 

 few small punctures; in one example there is some extremely fine 

 and feeble punctulation throughout latero-basally; elytra nearly 

 one-half longer than wide, very little wider than the prothorax, 

 obtusely rounded behind, the parallel sides feebly arcuate, the sinus 

 extremely feeble though evident; striae rather fine, generally not 

 much impressed, the scutellar long; intervals flat to feebly convex, 

 usually distinctly so suturally, the puncture a little before apical 

 fourth; basal joint of the hind tarsi but little shorter than the fifth; 

 mentum generally without trace of tooth, though sometimes the 

 bottom of the emargination has a very feeble and broadly arcuate 

 projection, nearly as in the preceding section of the group. Length 

 (cf 9 ) 7.5-10.0 mm.; width 2.9-3.8 mm. Long Island and Virginia 

 to Nebraska. Very abundant. [H. mutabilis Hald. and proximus 

 Lee.] herbivagus Say 



Surface latero-basally flatter, though always feebly and very broadly 

 convex and evidently punctured throughout, the punctures also 

 extending along the lateral margin for some distance anteriorly. .25 



25 Basal angles of the prothorax rather broadly rounded, the sides of the 

 base feebly posteriorly oblique. Body oblong, subparallel, rather 

 convex, polished, the elytra ( 9 ) subopaque; color black when mature, 

 slightly piceous beneath, the abdomen partially rufescent; appen- 

 dages throughout ferruginous; head scarcely three-fifths as wide as 

 the prothorax, the eyes moderate, the antennae slender and the foveae 

 small, perforate; prothorax less than one-half wider than long, much 

 less abbreviated than in herbivagus, the sides subevenly rounded; 

 apex sinuate, narrower than the base; sides finely re flexed, the gutter 

 only slightly widening posteriorly, disappearing near basal fourth; 

 foveae short, rather broadly impressed, deep centrally and very 

 densely, rugosely punctate; stria very fine; elytra less than one-half 

 longer than wide, scarcely at all wider than the prothorax and barely 

 two and one-half times as long, very obtusely rounded in about 

 apical two-fifths, the sides broadly arcuate, the sinus vestigial, barely 

 traceable; striae rather fine, slightly impressed, the intervals feebly 

 convex, nearly flat externally, the puncture distinct, near apical 

 third (c?) or fourth ( 9 ); basal joint of the hind tarsi about as long 

 as the fifth. Length (cf 9 ) 8.0-10.6 mm.; width 3.2-4.2 mm. New 

 Mexico and Colorado. Very abundant. Thirty-six examples. 



fallax Lee. 



