94 CASEY 



A — Similar to IcBviventris, except that the abdominal surface is not pol- 

 ished but feebly alutaceous, the hind coxae not uniformly black but 

 with a transverse pale discal spot, and the large spots of the last seg- 

 ment not full and vaguely triangular but transverse, each with a slen- 

 der vitta proceeding from the side posteriorly and extending parallel 

 to the sides almost to the tip; prothorax more strongly and abruptly 

 swollen at the sides in basal half. Length (?) 21.0 mm.; width 

 8.0 mm. Washington State pugetana n. subsp. 



II — Pronotum strongly impressed near each side just behind the middle. 

 Body oblong-elongate, rather feebly convex, black, without distinct 

 metallic lustre, the under surface with short sparse hairs; head densely 

 punctato-rugulose, sparsely pubescent, with a narrow elongate callus 

 medially and a fine stria thence to the base, the eyes moderate; front 

 with anterior as well as juxta-ocular pale spots in both sexes; antennae 

 unusually thick; prothorax very nearly twice as wide as long, the sides 

 inflated and strongly, evenly rounded in basal half, thence straight and 

 converging to the apex, the latter and base strongly bisinuate; surface 

 with the margins near the apical angles and a small elongate spot near 

 the basal pale, the punctures coarse, close, dense and rugulose laterally, 

 the four smooth vittse very pronounced, the impression within as well 

 as without the sublateral irregular vittae distinct, the median vitta 

 strongly striate along the middle except apically, the two anterior callous 

 spots large and well defined; elytra parallel, the sides gradually 

 rounding posteriorly to the wholly unextended apices, which are trun- 

 cate and usually bidenticulate, the surface with the alternate intervals 

 perfectly flat, subopaque, finely and densely punctate, or very convex, 

 polished, not more coarsely but very sparsely punctate, the four pale 

 fasciae broken into small elongate spots on the ridges; under surface 

 with small pale spots on the prosternum, met-episternum, coxae and 

 along the under side of the femora; abdomen strongly punctate, sulcata 

 at base, wholly immaculate (J*), or with a series of very small red dots 

 along each lateral margin ( $). Length 17.5-20.0 mm.; width 6.8-7.7 

 mm. New Mexico diruptans n. sp. 



Pronotum not or feebly impressed sublaterally, the sides strongly swollen 

 basally, thence converging and almost straight to the apex; elytra with 

 the intervals equally polished throughout, the flatter and more convex 

 not so unequal and sparsely, subsimilarly punctate, the pale fasciae 

 more developed, attenuate outwardly and interrupted only at the striae, 

 the second tending to curve forward anteriorly at the sides; apices 

 always truncate, bispiculose and frequently very feebly, irregularly 

 undulate; under surface with small pale spots on the sterna and coxae 

 and sometimes on the under side of the femora 12 



12 — Elytra unusually prominent at the sides near basal fourth and thence 

 strongly sinuate to behind the middle; male with two small convexities 

 in the apical margin of the second ventral, the median part of the seg- 

 ment flattened, with the coarse dense punctures streaming obliquely 

 toward the two inequalities. Body black, ^vithout metallic lustre; 

 head (cJ') not coarsely but closely punctate, with a median and two 



