OF PHILADELPHIA. 127 



Scaphtdium 4-(/utta(um Knoch in Mclsh. Catyl. 



Body black : head with minute obsolete punctures ; mouth and 

 base of the antennae piceous: thorax obsoletely punctured : an 

 indented undulated transverse line of large profound puneturesat 

 base ; elytra with a series of dilated profound punctures at base, 

 abbreviated at the humerus ; an impressed subsutural slightly 

 crenated stria ; two or three obsolete much abbreviated series of 

 punctures near the middle, and two rufous spots, of which one is 

 subbasal, transverse, panduriform, originating at the exterior 

 edge and extending more than half across the elytron ; the other 

 spot subterminal, obtusely lunate. 



Length one-tifth of an inch nearly. 



Var. a. Elytra spots obsolete. 



2. S. 4-PUSTULATUM. — Black ; thorax with an undulated 

 series of large punctures; elytra with four rufous obtusely lunate 

 spots. 



Inhabits the United States. 



Scaphidium -i-pustidatuni ? Knoch in Melsh. Catal. 



This species is similar to the preceding, excepting that the an- 

 terior elytral spot is very obtusely lunate, being emarginate only 

 on the anterior side, a character [ 199] which, as far as my ob- 

 servation has extended, is invariable. 



HETEROCERUS Bosc. Fabr. 



1. TI. PALLIDUS. — Thorax livid-brown, margin whitish J elytra 

 whitish, lincate, and spotted with dusky. 



Inhabits Missouri. 



Head dark livid : clypeus paler, transverse-quadrate, truncate 

 before: labrum prominent : eyes black: antennae whitish : man- 

 dibles elongated, slightly arquated ; exterior base deeply ciliated; 

 a slight tooth and emargination before the middle ; inner edge 

 bideutiite near the tip ; posterior tooth small : scutcl long, tri- 

 angular, minute : elytra whitish, slightly striated ; striae near the 

 suture obsoletely dusky; three undulated, dilated, obsolete, dusky 

 bands : feet white ; anterior pair dilated, compressed, and fur- 

 nished on the exterior and rounded tip with about thirteen pro- 

 minent spines ; spines of the posterior pairs of feet less robust : 

 pectus and venter pale yellowish or whitish. 

 1823.] 



