78 Journal New York Entomological Society. [VoLvii. 



3_Elytra completely black, with two small and obsolescent transverse whitish spots 

 at the basal margin and one on each elytron, larger and triangular, at the lateral 

 margin and apical fourth. Length 6. mm. ; width 4. o mm. California to Van- 



-, 1 J moestaZ^f. 



couver Island 



Elytra red, with a transverse basal fascia of black, either complete and constant, or 

 formed occasionally and in certain individuals by the coalescence of the small 

 scutellar and two post-scutellar spots with the two humeral 4 



Elvtra never with a transverse basal fascia, the two post-scutellar points when pres- 

 ' ent never coalescent with the scutellar spot, the latter always very small or obso- 

 lete ■ elytra frequently immaculate, generally very .finely and inconspicuously 



' , II 



punctured 



Elvtra never with a tranverse basal band or post-scutellar spots, the scutellar spot 



' larger and more or less elongate-oval or rhomboidal, sometimes involving almost 



the entire suture ; discal and humeral spots tending to unite to form a black 



vitta; marginal white area of the pronotum narrow and subequal m width 



throughout, the diverging discal lines distinct, the outer post-median spot when 



disconnected always small, the inner large '7 



4-Subapical black spot of the elytra constantly large and chstinct ; body generally 



more broadly oval ' * 



Subapical black spot constantly wanting or extremely rudimentary ; body generally 

 more narrowly oval ; lateral angulation of the pronotal black area pronounced, ' 

 the white margin very broad anteriorly, frequently intenupted in the middle, the 



basal part sometimes obsolete as in typical externa 8 



5-Lateral angulation of the black pronotal area strong, frequently dividing the white 

 marginal area, the apical and basal parts of the latter wider, the basal becoming 

 obsolete in typical examples oi 5-signata ; body larger and more broadly oval^ 



the pronotal punctures very fine and not close-set 



Lateral angulation of the central black area very obtuse, the marginal white area nar- 

 row throughout but entire ' 



6— Basal band of the elytra broad, very constant and almost equally wide throughout, 

 obtusely truncate at its lateral limits on the callus and angularly involving the 

 scutellum; post-median black spot large, somewhat obliquely transverse, 

 straight, even, extending nearer to the side margin than the suture. Length 

 6.2 mm. ; width 4.0 mm. Colorado, Lake Superior and Hudson Bay [ nmhanti 



, ' 5-signata Kirhy 



Basal band of the elytra rarely entire and then very irregular, the scutellar and post- 

 scutellar points generally coalescent, forming a trilobed star, which is generally 

 isolated from the humeral spots ; post-median black spot transversely arcuate or 

 sinuate, evidently formed by the amalgamation of two transverse spots, the sub- 

 sutural slightly the more basal. Length 4-9-6.0 mm. ; width 3.2-4.0 mm. 



New Mexico, Colorado. Utah and Oregon lecontei Muh. 



7-Pronotum more strongly and quite densely punctate ; basal band of the elytra 

 strongly developed and entire, the humeral dilatation well marked ; post- 

 median spot composite, consisting of a large, outwardly and anteriorly oblique 

 spot, united behind its anterior limit, with a smaller external, inwardly and ante- 

 riorly oblique spot ; subapical spot transversely oval, with an internal postenor 

 angulation; body smaller. Length 4 7 mm.; width 2.9 mm. Canadian 

 Rocky Mts puncticolUs, sp. nov. 



