RUTELINyE 8 1 



tion, and yet there could be no doubt whatever of the reality of 

 Plusiotis as a genus. Very much the same condition of generic 

 distinctness obtains between Pelidnota and the Brazilian Chalco- 

 plethis. In Plusiotis the head is very large, as in the subgenus 

 Pelidnotidia, which distinguishes the genus readily from Plusiotina 

 defined below; the species known to me are the following: 



Elytra each with four broadly impressed lines of polished, nickel-like 

 metallic lustre. Body oblong-oval, strongly convex, pale but rather 

 dull green in color above, beneath and throughout the legs, the peri- 

 phery of the pronotum polished and more golden-green, the pronotal 

 surface with a polished area of brighter green at each side medially; 

 elytral side margins metallic like the grooves; each abdominal seg- 

 ment with the hind margin very bright yellowish-silvery metallic; 

 head fully half as wide as the prothorax, rather finely but strongly, 

 the clypeus closely, punctate, the latter parabolic, feebly concave 

 peripherally; antennae testaceous-brown, the basal joint metallic 

 green, the club (9) barely longer than the preceding six joints; 

 prothorax twice as wide as long, convex, broadly lobed at base, the 

 sides broadly subangulate behind the middle, the apical angles only 

 moderately prominent, the ambient bead thick and strong through- 

 out, broader and flatter toward the middle at apex; punctures every- 

 where fine, very feeble and sparse; scutellum polished, metallic, 

 dull toward the middle of the base; elytra barely a fifth longer than 

 wide, evidently wider than the prothorax, parallel, with feebly 

 arcuate sides and very obtusely rounded apex, the lateral margins 

 not thickened basally; punctures obsolete, except in fine series near 

 the sides and basally toward the scutellum; pygidium with very 

 small and feeble sparse punctures, also slightly scratched along the 

 basal margin or sometimes nearly throughout; mesosternal process 

 rather small and acute, the prosternal post-coxal well developed. 

 Length (9) 25.7-26.5 mm.; width 13.2-14.0 mm. Arizona. Four 

 examples, the male not at hand. Said by Mr. Wenzel to occur also 

 in the mountains near the Great Bend of the Rio Grande in Texas. 



gloriosa Lee. 



Elytra even in surface, without trace of impressed vittae metallic or 

 otherwise 2 



2 Prothorax less transverse, evidently less than twice as wide as long; 

 legs golden-green, the tarsi steel-blue. Body stout, oblong-oval, 

 rather less convex than gloriosa, bright green, with more or less 

 suffusion of a golden-green tint, especially at the elytral margins, 

 tibiae, on the clypeus and at the apices of the abdominal segments; 

 lustre slightly alutaceous or somewhat sericeous; head fully half as 

 wide as the prothorax, subopaque, densely green, the punctures deep 

 and very close, sparser basally, the interspaces everywhere with very 

 minute close punctulation; clypeus broadly parabolic, the surface 

 feebly concave toward the finely and feebly reflexed periphery 

 throughout; eyes notably small, not at all prominent; antennae very 

 T. L. Casey, Mem. Col. VI. Oct. 1915. 



