76 R. W. Dawson 



Pronotum not narrower at base than at apex 7 



7. Elytra not pubescent 8 



Elytra more or less pubescent 15 



8. Side margins of pronotum explanate, usually with a concavity 

 near the hind angles 9 



Side margins of pronotum not explanate 10 



9. Elytra, sides of pronotum and head dull red explanatus 



Color uniformly dark brown brevicollis 



10. Mesosternum distinctly carinate between the coxae; pronotum 

 without basal, marginal line; front tibiae punctate on the an- 

 terior face, first tarsal joint longer than the second 11 



Mesosternum not carinate between the coxae; anterior tibiae 

 smooth in front 12 



11. Hind tibiae stout; first joint of hind tarsi not as long as the 

 next three together rubeolus 



Hind tibiae slender; first joint of hind tarsi longer than the 

 next three together stercorosus 



12. Uniformly reddish brown; length 8-9 mm concavus 



Largely or entirely black or piceous 13 



Elytra light brown or yellowish, either marked with black, or 

 more or less clouded 14 



13. Body beneath and legs piceous coloi-adensis 



Body beneath and legs pale yellow; elytra often with the altern- 

 ate intervals having small red spots bicolor 



14. Anterior margin of clypeus angulate at each side of the middle; 

 smaller, length 4.5 mm. or less serval 



Anterior margin of clypeus broadly rounded at each side of the 

 middle; larger, length 4.5-5.5 mm 18 



15. Elytra reddish brown, head and thorax a little darker; length 



3.4 - 4 mm lentus 



Elytra, at least in part, yellowish, head and thorax largely 

 black; length 4.5-6 mm 16 



16. Elytra largely yellow, merely the suture darker isnhtruncatus'] 



182 



