WEST IXDIAJT APHODn^TAE CHAPIN 13 



Punctures on frons coarse near eyes, becoming exceedingly fine 

 toward anterior margin ; punctures on pronotum very coarse, 

 crowded and subconfluent at base 3. beattyi. new species 



5. Front of bead except adjacent to clypeal margin rather closely set 



with coarse, elongate punctures ; extreme marginal area trans- 

 versely rugulose ; discal elytral intervals nearly flat, each with 



a series of punctures 4. abditoides. new species 



Front of head near eyes si)arsely to densely set with round pimc- 

 tures. lower (anterior) portion irregularly and rather coarsely 

 rugtilos 6 



6. Elytxal intervals on disk carinate, each carina broken into a 



series of shining points ; pronotum with a very shallow longi- 

 tudinal groove reaching from point just before the scutelhun 



to about half length of pronottun 5. vincentiae Arrow 



Elytral intervals on disk flat or convex, not carinate; pronotum 



without trace of median longitudinal groove 7 



7. Pronottim swollen posterolaterally so as to overhang the postero- 



lateral margin ; discal punctures very coarse, mostly separated 

 by less than their diameters ; punctures on intervals of elytra 



coarse 6. corrosus. new species 



Pronottun normal, not overhanging margin at any point ; discal 

 pimctures coarse, mostly separated by more than their diame- 

 ters : punctures on intervals of elytra fine 7. abditus iHaldeman'* 



8. Pronottun tintisually short, hardly more than one-third as long as 



elytra ; anterior femtir thin, oblong, with fine marginal groove : 



posterior femtir slender 27. brevinotus. new species 



Pronotum normal, almost half as long as elytra ; femora normal 

 for gentis 9 



9. Anterior femur beneath without marginal groove 26. terminalis (Chevrolat) 



Anterior femtir beneath grooved at least along anterior margin 10 



10. Posterior femur with groove along posterior margin, which may 



reach the entire length of femur or which may be present only 



in its apical portion 11 



Posterior femur without groove along posterior margin 19 



11. Upper surface opaque, elytral punctures set with minute setive : 



posterior femur with entire groove 12 



Upper surface shining, elytral punctures mostly without setae ; 

 posterior femur with groove usually abbreviated 14 



12. Setae on elytra suberect. conspicuous; pronotal punctures very 



coarse, tending to coalesce at sides S. imbricatus (.Melsheimer) 



getae on elytra closely approssed. not visible except with high 

 magnification ; pronotal ptmctures less coarse, discrete 13 



13. Elytral intervals subcarinate, scutellum broader at base than 



long, punctures on intervals near scuteUum moderately coarse. 



9. miamii Cartwright 

 Elytral intervals flat, scutellum longer than width at base, pimc- 

 tures on intervals near scutellum exceedingly fine 10. tenebrosus Arrow 



14. Posterior femoral groove reaching nearly to insertion of femur : 



outer elytral interval (adjacent to lateral margin ■! opaque__20. frater Arrow 

 Posterior femoral groove abbreviated, only on apical half of 

 femur; outer elytral interval not noticeably different from 

 others 15 



