CRYPTOCEPHALUS IN AMERICA NORTH OF MEXICO 15 



Key to the North American Species of Cryptocephalus 



1. Elytron black (some with metallic blue or green luster) and with a red 



to yellow basal marking and an apical spot (sometimes absent or 

 connected with basal marking), rarely with additional light markings 



(figs. 20-32) 2 



Elytron not as above, usually light with dark markings, if predom- 

 inantly black (some with metallic blue or green) without spots (figs. 



19 and 33-93) 15 



2(1). Pronotum pubescent 3 



Pronotum not pubescent 6 



3(2). Posterior margin of basal elytral red spot diagonally straight or nearly 



so (fig. 24); elytra lacking pubescence; Arizona . . pubicollis Linell 



Posterior margin of basal elytral red spot concave or convex (figs. 20 



and 21); elytra pubescent; Texas to Kansas to Kentucky . ... 4 



4(3). Basal elytral red spot larger and with posterior margin convex (fig. 21) ; 



elytral punctures larger, distinct; Texas basalis Suffrian 



Basal elytral red spot smaller and with posterior margin concave 

 (figs. 20 and 106); elytral punctures smaller, less distinct; Texas to 



Kansas and Kentucky 5 



5(4). Basal elytral red spot broadly attaining suture at center and at side 



extending past middle of elytra (fig. 20) ; pubescence of dorsal surface 

 denser; Texas to Kansas and Kentucky .... mucoreus Leconte 

 Basal elytral red spot neither clearly attaining suture nor at side extend- 

 ing past middle of elytra (fig. 100); pubescence of dorsal surface finer; 



Texas lunatus, new species 



6(2). Basal spot attaining both scutellum and apical spot 7 



Basal spot attaining either scutellum or apical spot, never both . . 8 

 7(6). Basal and apical spots joining at sixth and seventh or eighth intervals 



(fig. 31); length 3.6 to 5.1 mm.; Canada to Texas to Utah. 



notatus sellatus Schaeffer 



Basal and apical spots joining at eighth or ninth and marginal intervals 



(fig. 32); length 5.0 to 6.3 mm.; Arizona. . . pubiventris Schaeflfer 



8(6). Entire basal half of elytra red or only intervals one to four black at base 



(fig. 27) ; Florida binominis rufibasis Schaeffer 



Elytra and/or locality otherwise 9 



9(8). Basal spot attaining scutellum (figs. 30, 32) 10 



Basal spot not attaining scutellum 11 



10(9). Pubescence of ventral surface longer, denser; 5.1 to 6.2 mm.; Arizona 



(fig. 32) pubiventris Schaeffer 



Pubescence of ventral surface shorter, sparser; 3.6 to 5.5 mm.; eastern 



to central U.S. (fig. 30) nolatus quadrimaculatus Say 



11(9). Pronotum reddish at side; elytra with spots in addition to basal and 



apical markings (fig. 28) ; Arizonas .... multisignatus Schaeffer 



Pronotum black throughout; elytra with only basal and apical markings; 



east U.S. to Arizona ^^ 



12(11). Dorsal surface faintly bluish; body 1.8 to 2.0 times as long as wide; 

 apical spot reduced to absent (fig. 25) ; Arizona, New Mexico, Utah, 



Colorado plnicola Schaeffer 



Dorsal surface usually not bluish; body 1.6 to 1.8 times as long as 

 wide; various localities; apical spot present 13 



