38 [April, 1844. 



bescent: abdomen with the sides nearly parallel; brown, with the posterior 

 m trgins of the segments dull rufous; minutely punctured, pubescent: feet tes- 

 taceous : pectus reddish-brown : coxae testaceous. 



7. P. rufieornis. Reddish-brown; antenna;, palpi and feet rufo-testaceous; 

 thorax with five dorsal punctures. — 2^ 1. long. Pennsylvania. 



Antennae half as long again as the head; second joint a little longer than 

 the third ; joints 4 — 10 equal ; rufous, two basal joints, mouth and palpi, paler : 

 head subquadrate, posteriorly rounded; sides subrectilinear ; very slightly nar- 

 rower than the thorax, black, shining, with the ordinary punctures small, but 

 well impressed, the two intermediate ones of the four, between the eyes, very 

 remote from each other: thorax dark rufo-piceous, slightly narrower than the 

 elytra, almost as wide as long, not contracted anteriorly; base with the posterior 

 angles rounded; sides rectilinear; apex truncate, with the anterior angles 

 rounded, and slightly deflexed ; ten dorsal punctures, five in each row, the first 

 and second remote from each other: scutel coarsely punctured : elytra nearly 

 as long as the thorax, brown, with the margins obsoletely rufous or testaceous; 

 punctured and rugulose, slightly pubescent: abdomen obscure fuscous, mi- 

 nutely and densely punctured, pubescent; posterior margins of the ventral seg- 

 ments dull rufous: feet rufo-testaceous: postpectus black: tibiae spinulose. 



8. P. niger. Deep black ; head suborbiculate ; thorax with five dorsal 

 punctures. — 3 1. long. Pennsylvania. 



Black, somewhat piceous: antenna; hardly as long as the thorax ; second and 

 third joints subequal; joints 4 — 10 equal in thickness; black, with two basal 

 joints piceous: head suborbiculate, slightly contracted behind, almost as wide as 

 the thorax, polished ; the ordinary punctures between, above and behind the eyes 

 distinct : palpi piceous : thorax some narrower than the elytra ; base, including 

 the posterior angles, rounded ; sides parallel; ape-x truncate, anterior angles 

 rounded ; shining, with ten dorsal punctures, five in each series, the apical one 

 remote from the others and somewhat out of range; lateral punctures about 

 four or five ; punctures not deeply impressed : elytra wider than long, and 

 hardly longer than the thorax, aomewhat coarsely and rugosely punctured, 

 slightly pubescent: abdomen minutely and densely punctured, slightly pubes- 

 cent; posterior margin of the penultimate ventral segment obscure rufous: 

 feet black or dark brown, with the tarsi paler ; tibiae spinose : tarsi simple, 

 slender. 



9. P. fusiformis. Fusiform, black; two basal joints of the antennae, ely- 

 tra, and feet rufous; thorax with six dorsal punctures. — 3 1. Jong. Pennsyl- 

 vania. — Very abundant. 



Head narrower than the thorax, suborbicular, black, shining, with the ordi- 

 nary punctures small: antennae fuscous, third joint slightly longer than the 

 second, first and second joints rufous, third obsoletely rufo-piceous: palpi rufo- 

 testaceous: thorax a little narrower than the elytra, subquadrate; base with 

 the posterior angles obtusely rounded; sides parallel; apex truncated, with the 

 anterior angels rounded, and scarcely deflexed ; black, shining, with twelve 

 dorsal punctures, six in each series ; lateral punctures five, or six ; punctures 

 small: elytra quadrate, longer than the thorax, rufous, finely rugulose and 

 punctured, slightly pubescent : abdomen elongated, gradually narrowed to the 



