178 AMERICAN COLEOPTERA. 



B. distiiigiiendus Horn. 



Dr. Horn does not mention in his description of this species 

 the very long spur of the hind tibia. The fourth antennal 

 joint is abruptly much larger than the third, being nearly 

 twice as wide as the latter, and subequal in length to the 

 second and third together, at least in the male ; no females are 

 at hand. The first ventral is faintly impressed near the base 

 in the male. The general form and mottling of the upper sur- 

 face suggest hibisci, but the latter is at once distinguished by 

 the short tibial spur and smaller fourth antennal joint. 



B. pugiunculus n. sp. 



Very closely allied to longistilus, but differing in so many of the 

 smaller details that a specific name seems warranted. The size and 

 form are nearly identical in the two species, except that in the present 

 one the sides of the prothorax are more strongly arcuate anteriorly. 

 The elytral pattern is of the same type in both, but is here much less 

 sharply defined, owing to the more feebly contrasting colors of the 

 pubescence which is gray and pale brown instead of gray and blackish 

 brown as in longistilus. The spots of pale hairs on the prothorax are 

 correspondingly indistinct and the thoracic punctuation is rather less 

 dense in pugiunculus. Antennae with basal four joints pale, the outer 

 joints distinctly less incrassate than in longistilus. Tarsi blackish, 

 the legs otherwise rufous, except the base of the hind femur. Spur of 

 hind tibia three-fifths as long as the first tarsal joint, the latter evi- 

 dently though not greatly longer than the following joints together. 

 In longistilus the antennae are entirely black, legs less completely pale, 

 spur of hind tibia and basal joint of tarsus each relatively a little longer. 



Chiricahua Mountains, Arizona. A single example col- 

 lected and given me by Mr. V. L. Clemence. 



B. biustulus n. sp. 



Form and size of longistilus, black, legs bicolored, the apex of the 

 front and middle femora, front and middle tibiae, and hind tibiae in 

 apical half, pale, otherwise piceous. Surface moderately densely 

 cinereous pubescent, varied with ochreous or brownish in much the 

 same fashion as in the two preceding species. Antennae not passing 

 the humeri, piceous, basal four joints pale, fifth joint as long as wide, 

 6-10 transverse, the outer ones quite strongly so. Head closely punc- 

 tate, front not at all carinate, eyes separated by a distance which is 

 fuily as great as their own width. Prothorax with a narrowly divided 

 brownish-ochreous longitudinal median stripe. Elytra with a pale line 

 at the middle of the third interspace, before and behind this rather 

 faint darker spots, and opposite it externally a larger transverse 

 blackish brown spot nearly reaching the side margin, each elytron at 

 apex also with two of the more obscure darker spots. Hind thighs 



