170 AMERICAN COLEOPTERA. 



Scutellum much less elongate, either subquadrate, rounded or trans- 

 verse. 

 Eyes large, narrowly separated on the front, the latter carinate 

 between them ; antennae — especially of the d 1 — long 

 and rather strongly serrate. 

 Prothorax, under surface, base of hind thighs and joints 5-10 of 

 antennae, black; elytra rufous with lateral black spot. 



(Kansas, New Mexico.) bisignatUS Horn. 



Entirely ferruginous, either uniformly clothed with pale pubes- 

 cence, or with some darker spots on some of the elytral 

 intervals. (Brownsville, Texas.) 



macrophthalmus Schf. 

 Eyes smaller and more distant, separated as a rule by about their 

 own width. 

 Pubescence more or less variegated. 



Elytra conspicuously tessellate with elongate spots of black, 

 white, and luteous pubescence. (Southern Arizona.) 



speciosus Schf. 

 Elytra much less conspicuously variegated with luteous or cine- 

 reous and darker ochreous or brownish pubescence. 

 Scutellum small, rounded ; apical spur of hind tibia short, 

 about one-sixth the length of the first tarsal joint. 



(Texas.) pectoralis Horn. 



Scutellum oblong, subquadrate or slightly elongate, emar- 



ginate at apex ; apical spur of hind tibia moderately 



long, about one-fourth the length of the first tarsal joint , 



Denticles of hind thighs closely approximate to the long 



tooth, the anterior one connate or subconnate at base 



with the latter. (Texas.) OCliraceus Schf. 



Denticles of hind thighs smaller and distinctly separated 



from the long tooth. (Florida.) floriclae Horn. 



Pubescence of elytra uniform, or with at most the faintest per- 

 ceptible trace of denser spots or lines. 

 Scutellum transverse, size large— 4 mm. (Middle States.) 



inornatus Horn. 

 Scutellum subquadrate or slightly elongate, emarginate at 

 apex; size smaller — always less then 3 mm. 

 Upper surface entirely pale. 



Pubescence uniform or very nearly so throughout, males 

 withfirst central unmodified. 

 Apex of posterior tibia deeply sinuate within and ad- 

 jacent to the spur, the latter but little less than half 

 as long as the first tarsal joint. (S. E. California.) 



griseolns n. sp. 



