NORTH AMERICAN COLEOPTERA. 229 



Occurs ill Texas, New Mexico and Arizona, those from the first 

 two regions are generally of the green color, those from Arizona 

 more generally blue. 



19. H. polita Oliv. — Elongate oval, scarcely narrower in front, convex, 

 aeneous bronze, shining; legs and autennie rufo testaceous. Antennae half as 

 long as the body, slender, joints 2-3-4 gradually longer. Head alutaceous, 

 slightly roughened near the eyes, frontal carina moderately prominent, the tuber- 

 cles distinct. Thorax one fourth wider than long, narrowed in front, sides 

 regularly arcuate, margin narrow, distinctly thickened at the front angles, disc 

 convex, a feebly impressed antebasal line extending very nearly across the disc, 

 surface very finely alutaceous. Elytra not wider at base than the thorax, hu- 

 meri not distinct, umbone scarcely prominent, surface alutaceous, very minutely, 

 sparsely punctulate. Body beneath reddish brown, a faint bronze surface lustre, 

 abdomen alutaceous, distinctly not closely punctulate. Length .16 — .18 inch.; 

 4 — 4.5 mm. 



The male has the last ventral sinuate each side, the middle form- 

 ing a short, semi-circular lobe, which is triangularly impressed, with 

 a short longitudinal impression near the apex. 



The form of this insect is somewhat that of our Psylliodes, there 

 being but a slight angle formed by the sides of the thorax and elytra. 

 This form, together with the pale antennae and legs, will enable the 

 insect to be recognized. 



This is erroneously placed as a synonym of Sydena frontalis in the 

 " Catalogus." 



Occurs in Georgia and the Carolinas. 



20. H. fiiscoieiieii Mels. — Oblong oval, moderately shining, olivaceous 

 green, antenna; and legs rufotestaceous. Antennse a little longer than half the 

 body, joints 2-3-4 gradually increasing in length. Head finely alutaceous, a 

 faint transverse groove between the eyes in which are a few indistinct punctures, 

 frontal carina broad and obtuse, the tubercles small. Thorax transversely sub- 

 quadrate, very little wider than long, not narrower at apex than base, sides very 

 feebly arcuate, margin very narrow, slightly thicKened at the front angles, disc 

 convex, the ante-basal impression fine, but moderately deep, extending nearly 

 from side to side, surface finely alutaceous and with very minute, sparse punc- 

 tures. Elytra not wider at base than the thorax, humeri broadly rounded, um- 

 bone not distinct, surface distinctly sparsely punctate near the base, smoother 

 at apex. Body beneath piceous with aeneous surface lustre; abdomen sparsely 

 punctate. Legs rufotestaceous, the posterior femora piceous with aeneous surface 

 lustre. Length .12 — .14 inch.; 3— 3.5 mm. 



In the male the last ventral is truncate at middle, a slight sinua- 

 tion each side, the middle at apex flattened, the edge slightly re- 

 flexed. 



