STUDIES IN THE AMERICAN BUPRESTID^ 57 



thorax three-fourths wider than long, the sides broadly rounded, more 

 strongly converging anteriorly, the basal angles somewhat prominent; 

 apical margin broadly arcuate except laterally, the base sinuate later- 

 ally; surface rugose laterally, and, less distinctly, apically, rather 

 finely, remotely punctate medially, the interspaces laterally with dense 

 aeneous punctures in vermiculate series; scutellum transversely oval; 

 elytra not evidently wider than the prothorax, narrowed shghtly to 

 near apical third, the sides thence rounding and feebly serrulate to 

 the feebly emarginate and bidenticulate tips; surface convex through- 

 out, striato-punctate nearly as in hrevipes; under surface shining, 

 black and aeneous, the abdomen strongly, rather sparsely seneo-punctate, 

 convex, notably ascending posteriorly. Length 28.0-29.0 mm.; width 

 10.0-10.3 mm. Western Texas grossus n. sp. 



A — Nearly similar to the preceding but shorter, the prothorax somewhat 

 shorter, more strongly punctured, less narrowed anteriorly, the head 

 relatively still larger; elytra shorter, more obtuse behind, the series 

 of punctures scarcely at all impressed and the punctuation laterally 

 less confused and scarcely more close-set than toward the suture; 

 tibiae shorter, more outwardly expanded at apex and notably more 

 densely setulose throughout. Length 26.5 mm.; width 9.5 mm. 

 Western Texas robustus n. subsp. 



Form narrower and more elongate, smaller in size, subcylindrically convex, 

 shining, the head large, in great part asneous, densely punctured and 

 pubescent, the smooth irregular areas strongly elevated; antennae 

 strongly compressed as usual, the third joint slightly less elongate; 

 eyes large and prominent; prothorax deep black, but little more than 

 one-half wider than long, the sides feebly converging, broadly, feebly 

 and subevenly arcuate from base to apex, the latter feebly arcuate; 

 base deeply sinuate laterally, the angles not at all everted; surface 

 deeply vermicularly rugose, with the intervals aeneo-punctate, coarsely 

 punctate apically, less coarsely and sparsely medially and basally; 

 scutellum tumid, transversely oval; elytra but little wider than the 

 prothorax, formed nearly as in grossus and similarly sculptured, with 

 widely spaced and distinct punctures in uneven single series along the 

 intervals, greenish-metallic in lustre, the sides apically rather strongly 

 and acutely serrulate, the apex approximately bidentate as usual; under 

 surface in great part aeneous, the abdomen strongly, more closely and 

 irregularly punctured, less strongly ascending posteriorly than in 

 grossus; tibiae not densely but strongly albido-setulose. Length 25.0 

 mm. ; width 7.8 mm. Arizona (Tucson) serrulatus n. sp. 



Form elongate, convex, much smaller in size than grossus, blackish-aeneous 

 in color, the pubescence sparse and extremely short; prothorax one-half 

 wider than long, slightly narrowed anteriorly, the sides broadly rounded, 

 the posterior angles acute; elytra finely striato-punctate, the intervals 

 sparsely punctate. Length 18.8-25.0 mm. Texas (Laredo to Ring- 

 gold Barracks). [ = Bupresiis sphenicus Lee] sphenicus Lee. 



5 — Body rather short, stout, the male narrower and with more cuneate elytra, 

 deep black, slightly shining, subglabrous as usual; head moderately 



