60 BULLETIN 18 2, UNITED STATES NATIONAL MUSEUM 



10. Coarse punctures of pronotuin distinct 8. smithi 



Punctures of pronotum not discrete, obscured by ground 



sculpture 9. weberi 



11. Pronotum with distinct longitudinal (or diagonal) impressions 12 



Pronotimi without distinct longitudinal impressions 13 



12. Longitudinal depressions forming a deep transverse median 



groove 13. borinquensis 



Longitudinal depressions feeble and not forming a deep trans- 

 verse median groove 12. obsolescens 



13. Elytra moderately coarsely punctate; pronotum without trace 



of punctures 11. impunctus 



Elytra very coarsely punctate; pronotum with fairly distinct 



shallow punctures near base 10. hispaniolus 



14. Pronotum with longitudinal depressions (sometimes obsolescent) 15 



Pronotum entirely without trace of longitudinal depressions 



(sometimes midline vaguely elevated) 26 



15. Elytra coarsely punctate 16 



Elytra moderately or finely punctate 18 



16. Punctures of pronotum not distinct, obscured by sculpture.. 14. danforthi 

 Punctures of pronotum distinct, not obscured by sculpture 17 



17. Pronotum distinctly over one-fourth wider than long 18. aridus 



Pronotum less than one-fourth wider than long 20. phaios 



18. Pronotum with distinct individual punctures separated by 



smooth intervals 21. scrobiger 



Pronotum with very dense punctures or more or less distinct 



sculpture 19 



19. Punctures of pronotum very fine and dense 20 



Punctures of pronotum not very fine or very dense (or densely 



sculptured) 22 



20. Elytra black or rufopiceus 22. petomus 



Elytra rufous or rufotestaceous 21 



21. Very slender; eyes not prominent 25. subtilior 



Moderately stout; eyes very prominent 19. aeolus 



22. Deep black throughout 15. cubensis 



At least in part rufescent, rufous, or testaceous 23 



23. Elytra distinctly paler at apex 16. imitator 



Elytra not abruptly paler at apex 24 



24. Pronotum shining, not very densely sculptured 25 



Pronotum not very shining, densely sculptured 17. varicornis 



25. Body very slender 25. prolixus 



Body moderately stout 23. flavipes 



26. Black, elytra marked with yellow from humerus to apex and 



along apical margin 28. discipennis 



Elytra not so marked 27 



27. Pronotum with a distinct narrow smooth midline 32. aequalis 



Pronotum without smooth midline 28 



28. Pronotum very densely sculptured, not at all shining 29 



Pronotum not very densely sculptured, more or less shining 30 



29. Black or plceous throughout 26. haplomus 



Black, pronotum rufescent, elytra piceorufous with apical third 



indefinitely plceotestaceous 27. tunapunae 



