122 A. MATTHEWS. 



Head large and prominent. 

 Pronotum moderate, generally sub-quadrate. 

 Elytra truncate. 



Abdomen rather long, 4 or 5 segments exposed. 

 Mesosternum shortly carinated. 



Metasternum moderate, extending to the sides of the body. 

 Venter 7 segments. 



Posterior cox^ moderately distant, and moderately laminated, lamina 

 rather acumintite. 



Synoptic Table of Species. 



Thorax with the sides widest at the base brunnea. 



Thorax with the sides widest before the base. 



Thorax with the sides slightly rounded baltcata. 



Thorax with the sides strongly rounded Ou Valii. 



P. briliiiiea LeConte. Smiths. Misc. Coll. I, p. (52, 1866.— L. c. .75— .87 mm. 



Oblong, oval, moderately convex, shining, dusky, castaneous; sparingly clothed 



with golden hair; head large, rather long; eyes small, placed far back; thorax 

 moderate, transverse, broader and rather longer than the head, widest at the base, 

 deeply marked with large foveolate punctures; sides broadly margined and 

 slightly rounded, hinder angles rather obtuse; elytra oblong, eval, longer and 

 narrower than the head and thorax, widest before the middle, very deeply and 

 irregularly asperate, apex moderately rounded; abdomen rather long, obtuse; 

 legs and antennae long and slender, bright yellow. 



Differs from the other species in its larger size, and deeply punctured 

 thorax, widest at the base". 



United States (Dr. LeConte). 



P. balteata LeConte, Smiths. Misc. Coll. I, p. 62, 1866.— L. c. .50— .63 mm.— 

 Oval, convex, shining, bright yellow, sparingly clothed with short, pale hair ; head 

 large, elongate, rounded in front; eyes very small ; thorax moderate, rather longer 

 and wider than the head, widest at the middle, closely and faintly tuberculate j 

 sides rounded and broadly margined, hinder angles obtuse ; elytra short, quadrate, 

 scarcely wider or longer than the head and thorax, remotely asperate; sides nearly 

 straight, apex broad, scarcely rounded ; abdomen rather long and slender, bright 

 yellow. 



Differs from others in its small size, short and broad form, short quad- 

 rate elytra, and general sculpture. 



United States ( Motschulskyj. 



P. 1>II Valii Matthews, Trich. Illust. p. 164, 1872.- L. c. .8" mm.— Oblong, 

 oval, moderately convex, shining, dusky, castaneous, sparingly clothed with short 

 golden hair ; head large, rounded in front ; eyes rather large and prominent ; thorax 

 moderate, transverse, rather longer than the head, widest at the middle, orna- 

 mented with small, remote tubercles; sides much rounded and broadly margined, 

 hinder angles almost right angles; elytra oblong, longer but not wider than the 



