16 U.S. NATIONAL MUSEUM BULLETIN 290 



13(12). Basal spot at its apex attaining at least first interval and often suture 



(fig. 26) ; southeastern U.S binominis binominis Newman 



Basal spot at its apex rarely extending inward beyond third interval. 



14 



14(13). Basal spot with inner margin inclined away from suture at apex (fig. 



29); pronotum faintly bluish; length 3.3 to 4.8 mm.; body 1.6 to 



1.7 times as long as wide notatus notatus F. 



Basal spot with inner margin straight or inclined toward suture at 



apex (figs. 22, 23); pronotum rarely bluish; length 2.9 to 4.0 mm.; 



body 1.7 to 1.8 times as long as wide .... qiiadruplex Newman 



15(1). Punctures at elytral apex confused and completely obscuring inner 



and outer rows of puncture (fig. 3) 16 



Punctures at elytral apex not or but slightly confused, inner and 

 outer rows of punctures always distinct and usually clearly meeting 



(fig. 2) 22 



16(15). Pronotal disk densely, longitudinally furrowed, sides densely punc- 

 tate, dark reddish with light margins (fig. 8). schreibersii Suffrian 

 Pronotum coarsely to finelj' punctate throughout, color not as above. 



17 

 17(16). Elytra unicolorous, with no dark markings (fig. 38); pronotum alu- 

 taceous; length 2.0 to 2.4 mm.; northeastern states to Iowa. 



striatulus Leconte 

 Elytra with vague to distinct dark markings or pigmented striae; 

 pronotum not alutaceous; length 2.7 to 5.1 mm.; various locali- 

 ties 18 



18(17). Dark marking of elytron (fig. 70) a broad longitudinal stripe, some- 

 times branched; pronotal punctures small to moderate. 



incertus Olivier 

 Dark marking of elytron transverse, forming no pattern, or vague, or 



of pigmented striae; pronotal punctures large, coarse 19 



19(18). Elytral punctures largely confused, forming in-egular or double rows 



throughout (fig. 35) lateritius Ne^nnan 



Elytral punctures forming clearly defined rows, fifth, sixth, or seventh 



rows sometimes confused 20 



20(19). Dark elytral markings tending to form three broad, transverse bands 

 (fig. 37); length 2.8 to 4.5 mm.; New York to Florida to Kansas. 



tinctus Leconte 

 Dark elytral markings much reduced, not as above; length 4.4 to 5.1 



mm.; Florida to Texas 21 



21(20). Rows six and seven of elytral striae largely to completely confused 



(fig. 36); Florida ochraceus Fall 



Rows six and seven of elytral striae uniform to somewhat confused 

 (figs. 3 and 104) ; Texas to Louisiana .... implacidus, new species 



22(15). Pronotum wholly black or dark brown 23 



Pronotum not as above, with distinct to vague markings at least 



laterally or entirely light or reddish 25 



23(22). Elytra wholly black (fig. 42); length 3.5 to 4.5 mm.; California. 



sanguiniccllis nigerrimus Crotch 

 Elytra not wholly black, length 4.0 to 6.5 mm.; Arizona, Florida . 24 

 24(23). Small, 4.1 to 4.8 mm.; undersurface with short, rather sparse pubes- 

 cence; Florida notatus fulvipennis Haldeman 



