AMERICAN COLEOPTERA. 229 



Elytra without distinctly impressed lateral strise ~- 



Elytra with two lateral strife extending from near the middle to the apex, the 

 inner one rarely (mancum and gracile) feeble or subobsolete 3. 



2. Both front aud middle tibise without grooves on the outer face. 



Terminal palpal joints emargiuate at apex 1. puilCtulatum. 



Terminal palpal joints not emargiuate at apex 2. vitiosum. 



Front tibiae bisulcate, middle tibise not sulcate. 



Metasternum punctate at middle only, front with two coarsely punctate 



shallow impressions 3. iinpressifrons. 



Metasternum punctate throughout. 



Head coarsely punctate, the punctures nearly or quite as large as those at 



the sides of the pronotum, punctures of elytra tending to arrange 



themselves in longitudinal bauds, especially laterally.. .4. sectans. 



Head with intermixed coarser punctures, wbich are, however, distinctly 



finer than those at the sides of the pronotum, punctures of elytra 



more uniformly distributed 5. mutans. 



Front tibise bisulcate, middle tibise sulcate more or less plainly along the pos- 

 terior margin. 

 Metasternum nearly or quite irnpuuctate at sides, head virtually devoid of 

 coarser punctures. 

 Coarser punctures very inconspicuous on the elytra and nearly lacking on 



the pronotum 6. estriatum. 



Coarser punctures moderately numerous at sides of pronotum aud on the 

 elytra. 

 Larger (3.8-4.8 mm.), pubescence shorter, coarser punctures less marked. 



7. gran de. 

 Smaller (3-3.5 mm.), pubescence longer, coarser punctuation more con- 

 spicuous, the punctures of the metasternum more nearly approaching 



the sides 8. lentum. 



Metasternum punctate, nearly evenly from side to side 

 Coarser punctures numerous and conspicuous on head, thorax and elytra. 



9. coiiopliiluiii. 



Coarser punctures lacking on head and thorax, very sparse and fine on 



the elytra, not distinguishable unless deuuded of pubescence, body 



more broadly oval 10. latum. 



3. Anterior tibise bisulcate externally 7. 



Anterior tibiae with only a siugle well defined groove on the outer face 4. 



Anterior tibise not distinctly grooved, the posterior sulcus only faintly indica- 

 ted ; middle tibise not grooved ; metasternum with few sparse punc- 

 tures externally, profile not gibbous 11. simplex. 



4. Middle tibise grooved along the posterior margin 6. 



Middle tibise without marginal groove 5. 



5. Metasternum strongly longitudinally carinate at middle. 



12. metasternale. 



Metasternum not carinate. 



Anterior sulcus of front tibise entirely lacking; posterior sulcus strong, 



rather widely distant from the margin, nearly as long as the tibia; 



iutermixed coarser punctures of pronotum and elytra strong and 



numerous 13. i urequale. 



TRANS. AM. ENT. SOC. XXXI. JULY, 1905. 



