358 MEMOIRS ON THE COLEOPTERA 



represented only by a fine subsutural dot and the apices not at all 

 yellow. Length (cT) 22.5, (9) 23.5 mm.; width (cf) 7-3, (9) 7-5 

 mm. New Mexico (Fort Wingate) and Colorado, .biformis n. sp. 



Female nearly as in biformis but blacker, the elytra much deeper black 

 and more velvety, the head between the antennae more elevated and 

 more deeply, longitudinally sulcate, the last antennal joint, not 

 acutely oval and as long as the preceding as in biformis, but obtuse 

 and much shorter than the tenth, the prothorax of similar form and 

 sculpture but less transverse and smaller, much narrower than the 

 elytra, the latter of nearly similar form and ornamentation, except 

 that the ante-apical fascia is broken near the suture and the solid 

 apical yellow area replaced by a fine transverse fascia near the tip, 

 the apices not at all truncate but with the sutural angle evenly and 

 broadly rounded; under surface with the prosternum more evenly 

 punctate and less rugose, the denser apical hairs of the lateral part 

 of the ventral segments paler yellowish-cinereous; legs nearly similar. 

 Length ( 9 ) 22.0 mm. ; width 7.2 mm. New Mexico (Jemez Springs). 



muliebris n. sp. 



Female smaller, narrower, more parallel and less convex than in any of 

 the preceding, dull black, the elytra piceous-brown; head nearly as 

 in biformis, the antennae paler, pale rufous, but little more than two- 

 fifths as long as the body, with the outer joints still shorter, the tenth 

 but very slightly longer than wide, the eleventh oval and a little 

 longer; prothorax finely, evenly and densely sculptured, more globu- 

 lar, only between a fourth and fifth wider than long, otherwise 

 similar, distinctly narrower than the elytra, the latter almost parallel, 

 rather more than twice as long as wide, the sutural margin rounding 

 outwardly at apex to meet the rounding sides in a very blunt angle; 

 ornamentation nearly as in biformis, except that all the spots are 

 smaller, and that the subbasal fascia is narrower and more basal 

 than in any other, being on the basal convex declivity; the ante-apical 

 is broken at the suture as in muliebris; legs and under surface nearly 

 similar. Male more slender, the prothorax more strongly rounded 

 at the sides, the nubilous feeble marking of the elytra nearly as in 

 the male of biformis, the antennal joints shorter than in that species. 

 Length (c?, 9) 18.0-19.5 mm.; width 5.6-5.8 mm. Colorado. 



coloradensis n. sp. 



4 Form broader, more oblong and subparallel, the elytra more depressed, 

 the color throughout deep black, the head and prothorax nearly as 

 in biformis; prothorax (c? ) as wide as the elytral base, strongly con- 

 vex, not densely, confusedly rugulose as in all the preceding species, 

 but with small and irregular, very close-set but definite punctures 

 and more shining interspaces, the abruptly outlined arcuate sub- 

 lateral crescent somewhat depressed and very coarsely punctate; 

 elytra without ornamentation in the male, the apices minutely and 

 obliquely truncate at the sutural angles; under surface less densely 

 punctate and pubescent and more shining; vestiture throughout very 

 short, only moderately dense, dusky and barely visible. Length 

 (cf) 22. o mm.; width 7.1 mm. California lorquini Buq. 



