April, 1844.] 47 



scattered yellowish-cinereous hairs. Elytra blue, somewhat rugose, with ob- 

 vious dilated punctures furnishing minute hairs; each with a polished, yellow- 

 ish, slightly elevated spot at tip. Beneath blue. Tip of the abdomen and feet 

 yellow. Pennsylvania. 



3. P. ruficoliis. Blackish-blue; thorax, antenna; and feet, rufous. Length 

 rather more than 3 lines. 



Body blackish-blue, with short, yellowish-cinereous hairs. Head deep black, 

 polished. Thorax pale rufous, polished. Elytra blackish-blue; rugosely 

 punctured, punctures transversely confluent on the middle. Feet pale rufous. 

 Beneath blackish-blue. Pennsylvania. 



4. P. marginicollis. Blackish ; thorax yellow, with a black spot on the 

 middle. 



Pedilus marginicollis. Dr. Melsheimer in lit. Length nearly 3 lines. 



Body blackish, with pale yellowish hairs. Head deep black, shining, with a 

 transverse indentation between the eyes. Antennae, two first or basal joints, 

 yellow. Palpi dull yellowish, terminal joint fuscous. Mouth beneath yellowish. 

 Clypeus at tip, and labrum, pale piceous. Thorax honey-yellow, polished, 

 with a blackish spot on the disk. Elytra bluish-black; rugose; densely punc- 

 tured, punctures transversely confluent. Feet fuscous; tip of the tibiae, and 

 tarsi, pale yellowish. Beneath deep black. 



Var. a. Thorax entirely destitute of the thoracic spot. Pennsylvania. 

 Monohammus, Meg. 



M. tomentosus. Brown ; the entire surface of the body, antenna?, feet, and 

 greater part of the elytra, whitish tomentose, the latter spotted or interrupted 

 with brown. Length 9 14 lines. 



Body brown, densely covered with fine whitish prostrate hairs. Head with a 

 longitudinal impressed line between the antennas ; edge around the antenna?, 

 much elevated, somewhat spinose on the inner side. Month beneath, and cly- 

 peus, honey-yellow, the latter brownish at tip. Mandibles black. Thorax with 

 a rather long, obtuse, somewhat elevated spine each side behind the middle. 

 Scutel yellow. Elytra whitish tomentose, spotted or interrupted with brown ; 

 behind the middle, a large, irregular, transverse, brown spot nearly reaching the 

 suture. Pennsylvania. 



CEdionychis, Latr. 



(E. 1 hispida. Blackish, hairy ; antennae, basal portion pale rufous, tip 

 dark brown or blackish; feet yellowish, vaiied with piceous. Length 2 

 lines. 



Body blackish, invested with numerous, rather long, erect, blackish and yel- 

 lowish-cinerous hairs. Head obviously punctured, with an abbreviated longi- 

 tudinal impression on the front. Antennae, six first or basal joints pale rufous, 

 tip dark-brown or blackish. Thorax oblong, narrow, rather broadest behind, 

 somewhat rounded ; lateral margins decurved, rectilinear ; anterior portion not 

 wider than the head ; inequal; coarsely and confluently punctured, punctures 

 larger and more obvious near the basal margin. Scutel forming an oblong tri- 

 angle, yellowish-sericeous. Elytra with regular series of large, rather distant, 

 profound punctures. Femora, posterior pair, above blackish-piceous, below ru- 

 fous ; anterior and intermediate pairs piceous, the base and apex paler ; tibiae 

 and tarsi reddish-yellow, varied with piceous. Pennsylvania. 



