NORTH AMERICAN COLEOPTERA. 301 



surface not alutaceous. Body beneath piceous, abdomen sparsely punctate. 

 Anterior and middle femora brown, the posterior piceous with bluish green 

 surface, tibise and tarsi testaceous, the posterior tibifp more dilated than usual at 

 tip. Length .10— .12 inch.; 2.5— 3 mm. 



Male. — Last ventral sinuate each side, the middle lobe moderately prominent 

 and concave, a median impressed line near the base of the segment. Antennse 

 as in Le^visii. 



Female. — Last ventral with a slight longitudinal impression at apex. Antennae 

 as in the male. 



This is the largest and most robust of all the species with simple 

 antenniB and uiiicolored elytra. It is readily known by its uniform 

 blue color and the stouter hind tibise. 



Occurs occasionally in considerable abundance on the sea-coast of 

 New Jersey ; Massachusetts to Florida. 



13. I*, leneieollis Crotch. — Elongate oval, form rather slender, moderately 

 convex, piceous, head and thorax with a cupreous lustre, elytra greenish or 

 bluish. Antennae slender, half as long as the body, piceous, joints 2-5 and under- 

 side of first rufotestaceous. Head sparsely, indistinctly punctulate. Thorax 

 one-third wider than long, narrowed in front, sides irregularly arcuate, disc 

 convex, the punctuation moderate in size, closely placed, the surface alutaceous. 

 Elytra wider at base than the thorax, humeri obtuse, disc moderately convex, 

 the punctures rather coarser than those of the thorax, but less closely placed, 

 becoming finer near the apex, near the base there are conspicuously coarser 

 punctures tending to form strige, that just within the umbone quite evident. 

 Body beneath piceous. abdomen sparsely punctate. Legs piceous, the tibise and 

 tarsi brownish testaceous. Length .08 — .10 inch.; 2 — 2.5 mm. 



M(de. — Last ventral slightly sinuate each side, a narrow, feeble, triangular 

 impression at middle. Antennje simple, as in Lewisii. 

 Female. — Last ventral simple. Antennae as in the male. 



This species is especially related by the characters of the table to 

 chalybeipennis. It is less robust, more elongate, differently colored, 

 and with quite slender jjosterior tibiie. The larger punctures do not 

 form such distinct rows as in that species. 



Occurs in Kansas and Texas. 



14. P. Lewisii Crotch. — Elongate oval, moderately convex, piceous, surface 

 with dark bluish lustre. Aiitennae slender, half as long as the body, piceous, 

 joints 2-5 pale. Head sparsely, indistinctly punctate. Thorax more than half 

 wider than long, slightly uarrowed in front, sides arcuate, disc convex, punctures 

 moderate in size, not ciosely placed, surface not alutaceous. Elytra scarcely 

 wider at base than the thorax, humeri broadly rounded, disc convex, the punc- 

 tures coarser than those of the thorax, and tlierefore apparently more closely 

 placed, finer toward the apex. Body beneath piceous, shining. Abdomen very 

 sparsely punctate. Legs piceous, tibiie and tarsi brown. Length .08 — .10 iuch. ; 

 2 — 2.5 mm. 



