58 CASEY 



large, less elevated between the eyes than in the preceding species, 

 rugose and with greenish punctures, pubescent, more concave anteriorly 

 in the male; eyes large, prominent; antennae extending nearly to the 

 base of the prothorax (J*) or evidently shorter ( 9 ) ; prothorax trape- 

 zoidal, three-fourths to four-fifths wider than long, the sides distinctly 

 arcuate, becoming feebly sinuate basally, rugosely aeneo-punctate, 

 smoother and sparsely punctate medially and toward base; scutellum 

 less transverse and more quadrate than in the preceding species; elytra 

 scarcely wider than the prothorax, of the usual form, scarcely at all ser- 

 rulate at the sides behind, with the usual apical sinuation, the surface 

 notably flattened toward apex, the punctured series more or less con- 

 fused or irregular except toward apex, where they become deeper, 

 excepting four pairs of striae on each elytron, which are regular through- 

 out; under surface black and aenescent, the abdomen coarsely and 

 rugosely but not densely punctate; legs moderate, the hind tibiae more 

 gradually and distinctly thickened from base to apex in the male, the 

 fifth ventral truncate in both sexes but with the marginal gutter deeper 

 and more abrupt in the male. Length 23.0-27.0 mm.; width 8.3-10.0 

 mm. Southern Arizona planicauda n. sp. 



Body parallel and more convex, deep black, somewhat shining; head rela- 

 tively rather small, nearly as in planicauda, the eyes large and prom- 

 inent; third antennal joint a little more than twice as long as wide; 

 prothorax feebly trapezoidal, three-fourths wider than long, the sides 

 broadly and feebly arcuate, becoming straight toward base, the sur- 

 face coarsely but rather sparsely punctate, becoming asneo-punctate 

 and rugose laterally and apically; scutellum scarcely one-half wider 

 than long, oval, broadly impressed; elytra barely wider than the pro- 

 thorax, parallel and straight at the sides to apical third, thence gradu- 

 ally rounding to the emarginate apices, not at all serrulate except 

 feebly very near the tip; surface not notably depressed posteriorly, 

 sculptured as in planicauda though very much more sparsely and less 

 conspicuously, the only regular series, except the sutural as in plani- 

 cauda, being in four pairs; under surface black and aeneous, the abdo- 

 men rugosely punctate and with large flattened punctureless patches 

 laterally. Male with the apex of the fifth ventral transversely exca- 

 vated, the posterior truncate edge broadly, angularly lobed toward the 

 middle. Length 20.0 mm.; width 7.0 mm. Arizona (Nogales). 



cylindricus n. sp. 



6 — Pronotum somewhat irregularly sculptured, generally with rounded 

 punctureless areas anteriorly; body moderately narrow, cupreous, the 

 elytra greenish-metallic, parallel, feebly striato-punctate, the rounding 

 sides posteriorly evidently serrulate, the surface without dense pubes- 

 cence at base. Length 20.0 mm.; width 6.5 mm. Mexico. 



*mexicanus Lap.-Gory 



