216 [March, 1845. 



and closely punctured : elytra somewhat long, finely punctate-striate, punctures 

 longer than wide ; interstices broad, flat, each with about three irregular rows 

 of minute and distant punctures : beneath black, with a dense ashy pubescence : 

 feet, epipleurse and lateral abdominal margins, rufous : tarsi and posterior femo- 

 ral plates as in the preceding species. Sometimes the lateral elytral edges, and 

 the posterior ventral segments and tip, are rufous or piceous. 



Diacanthds, Latr. 



D.l signaticollis. Black ; lateral margins of the thorax broadly rufous. — 4 

 1. long, 1^1. wide. Pennsylvania. 



Black : head rugosely punctured, with the front and clypeus triangularly im- 

 pressed, the latter short, margined and obtusely rounded at tip; labrum large, 

 dull testaceous : antennae longer than the thorax, strongly serrate, dark fuscous, 

 with the second joint small, obconic, third as long as the fourth, but slightly 

 less wide, terminal shortly subulate : thorax a little longer than wide, not much 

 wider behind than before, with the sides rounded ; deeply and distantly punctu- 

 late, black, with lateral margins broadly rufous or piceous, with the dorsum 

 black, except a narrow basal space ; hind angles subacute, excurved, finely and 

 obliquely carinate, rufous, with the tip black ; glossy : scutel dusky, punctulate : 

 elytra deeply punctate-striate, with the interstices convex, distantly punctulate 

 and transversely corrugated : pleurae rufous : feet chestnut-brown, with the 

 tarsi lighter and simple, the joints gradually decreasing in length; posterior 

 femoral plates lanceolate. 



Pristiiophus, Latr. 



P.? sordidus. Blackish, densely clothed with an ashy-brown pubescence ; 

 elytra obscurely striate. — 15 1. long, 4 1. wide. Alabama. 



Dark brown or blackish, densely ashy-brown-pubescent : head with numerous 

 large punctures; front and clypeus impressed, the latter short, declined, and at 

 apex margined and obtusely rounded ; mouth rufous; palpi piceous: antennas 

 hardly longer than the thorax, serrate, brown, ashy pubescent, with the second 

 joint half the length of the third, obconic, third joint in every respect less than 

 the fourth, terminal joint distinctly subulate: thorax hardly longer than wide, 

 wider behind than before, moderately convex, densely, deeply and equally punc- 

 tulate ; medial line not apparent ; sides rectilinear from the posterior angles to 

 beyond the middle, thence to the apex strongly rounded ; hind angles rather 

 acute, somewhat excurved, strongly and obliquely carinate : elytra very ob- 

 scurely striate, the interstices more or less confluent, finely and distantly punc- 

 tured, and finely and obsoletely transverse-rugose ; sides gradually tapering 

 from the base to the apex: beneath black; feet paler; tarsi simple, gradually 

 decreasing in length ; hind femoral plates lanceolate and rather somewhat sud- 

 denly dilated within. This species is not rare, and has perhaps been already 

 described. It may, perhaps, be referred to the genus Aphanobius. 



2. Y.femoralis. Black, femora; discolored ; antenna? dull testaceous — 10 1. 

 long, 3 1. wide. Pennsylvania. 



Black, shining: head deeply and rather distantly punctulate ; front and cly- 



