376 MEMOIRS ON THE COLEOPTERA 



on the red parts, dense on the black, excepting the velvety-black 

 spot; semi-erect hairs of the under surface shorter, sparser and 

 cinereous. Length (cf 9 ) 7.0-8.0 mm.; width 2.7-2.9 mm. New 

 Mexico (Fort Wingate). Eight examples nigricollis n. sp. 



Body similar to the preceding but rather more depressed, slightly narrower 

 and smaller, the antennae more slender and not at all annulate, the 

 prothorax much more coarsely and closely punctate on the similarly 

 very feebly elevated medial part, but more finely and sparsely laterad, 

 the sides nearly similar, the uniformly black color however variegated 

 by a quadrate red spot at each side of the apex; elytra nearly similar, 

 except that the cinereous vestiture is more uniformly, though not 

 very densely, distributed throughout. Length (cf 9) 5-3-7-7 mm.; 

 width 2.0-2.5 mm - Arizona (locality unrecorded). Three examples. 



nanulus n. sp. 



5 Body much larger and stouter than in the three preceding, convex, 

 bright red throughout above, except the four pronotal spots, the 

 humeri and the two sutural chevrons, the anterior of which is some- 

 times much reduced in size and very rarely almost obsolete; under 

 surface, legs and antennae black, the anterior legs sometimes rufo- 

 piceous and the antennae not at all annulate; erect black hairs of the 

 upper surface shorter, finer and more numerous than in the preceding 

 section, the antennal fringe much less developed, disappearing 

 apically; prothorax one-fourth to one-half wider than long, the sides 

 obtusely and moderately prominent at the middle, the surface only 

 very finely and sparsely punctulate and with the central elevation 

 gradually formed, its lateral limits barely traceable; elytral punctures 

 relatively rather small, moderately close-set. Length (cf 9 ) 

 7.8-11.0 mm.; width 2.6-4.2 mm. Long Island, New Jersey and 

 Pennsylvania, [arator Germ.] canteriator Drap. 



6 Form stout, convex; color deep black throughout, with erect black 

 hairs and cinereous vestiture, the head red, the red elytra covered 

 in great part by the largely expanded and suturally coalescent black 

 chevrons, the posterior not acuminate antero-laterally in the usual 

 posterior rounded black spots as in all the preceding, but truncate 

 anteriorly along the posterior spots, which are transversely lineiform, 

 the anterior juxta-sutural black spots also transversely lineiform; 

 antennae black, not annulate but more cinereous beneath than above; 

 prothorax but slightly transverse, only feebly protuberant medially 

 at the sides, finely, sparsely punctate, without trace of the usual 

 four velvety-black spots but with the elongate medial region abruptly 

 and very strongly elevated, shining, subglabrous and sparsely and 

 rather finely punctate; elytra coarsely, not densely punctate, abruptly 

 finely so in the posterior black area. Length (cf) n.o mm.; width 

 4.0 mm. Lower California (San Jose del Cabo), Fuchs. 



elegans Horn 



7 Legs black, sometimes feebly and indefinitely piceo-rufous but only 

 from immaturity 8 



Legs partially red; body as a rule much larger in size; antennae always 

 annulate 14 



8 Post-humeral spot, near the margin, always wanting 9 



