STUDIES IN THE AMERICAN BUPRESTID^ 59 



Prasinalia n. subgen. 



Hiod tarsus as long as the tibia. Body elongate, cuneate, aeneous-green, 

 shining; epistoma truncate; head intricato-rugose, the antennae very 

 long, nearly one-half longer than the head and prothorax, the latter 

 slightly wider than long, narrowed anteriorly, the sides nearly straight, 

 truncate in front, "trisinuate" at base, the hind angles acute, not 

 everted; surface coarsely, and, at the sides, confluently punctate; 

 elytra narrow, convex, gradually narrowing from base to apex, the 

 tips bidentate, the surface rather coarsely and irregularly striato-punc- 

 tate; under surface finely and densely punctate, paler in color, the 

 prosternum polished and violaceous; hind tarsi compressed, the first 

 joint as long as the two following combined. Length 18.8 mm. 

 California (Owen's Valley). [=Gyascuius cuneatus Horn]. 



cuneatus Horn 



Hind tarsus distinctly shorter than the tibia, though slender and subcom- 

 pressed 2 



2 — Body narrow, the elytra unevenly cuneate, rather convex, polished, bright 

 metallic green above and beneath, the prosternum cuprascent, the 

 posterior margins of the ventral segments steel-blue; head with the 

 vertex elevated, the ocular slopes abruptly descending from longi- 

 tudinal polished impunctate areas along the sides, the median parts 

 more irregularly rugose, the epistoma very feebly and broadly sinuate; 

 antenna^ extending to basal fourth of the prothorax, the third joint 

 equal in length to the fourth, the eleventh with a short terminal process; 

 prothorax trapezoidal, with the sides but very feebly arcuate, less than 

 one-half wider than long, the apex arcuato-truncate, the base broadly 

 sinuate laterally and with a small feeble sinus at the scutellum; surface 

 moderately and sparsely punctate, more coarsely and coalescently so 

 laterally, the basal angles acute; scutellum small, only slightly trans- 

 verse; elytra not evidently wider than the prothorax, feebly narrowed 

 to near apical third, then more strongly to the acutely ogival apex, the 

 sides posteriorly serrulate, the apices emarginate; surface strongly and 

 closely, and, toward the sides and apices, confusedly punctate, the 

 punctured striae evident however and regular except near the sides, 

 somewhat impressed; under surface finely but not very closely punc- 

 tate, the prosternum medially polished and with a few punctures scat- 

 tered along the median line. Length 19.0 mm.; width 6.0 mm. Ari- 

 zona (Florence) angustus n. sp. 



Body larger and much stouter, similar in lustre and coloration, except that 

 the ventral segments are not margined with blue, the entire abdominal 

 surface irregularly clouded with metallic cupreous and green; head 

 nearly similar, except that the elevated polished areas parallel to 

 the eyes are not so well defined and are covered with coarse sparse 

 punctures; antennae similar, the eleventh joint with a short terminal 

 process; prothorax similar but more transverse, with the sides more 

 arcuate, becoming more evidently sinuate basally, the basal margin 

 at the scutellum not evidently sinuate and the surface broadly impressed 



