OF PHILADELPHIA. 101 



3. O. MELANOCEPHALUS. — Pule testaceous ; head and post- 

 pectus blaek ; suture dusky. 



Body pale testaceous, or whitish : head deep black : antenna; 

 and mouth pale testaceous : mandibles unarmed : elytra, suture 

 blackish : post pectus black. 



Length nearly one-tenth of an inch. 



Var. a. Abdomen reddish-brown. 



On the banks of the Missouri above the confluence of the I'latte 

 river. 



4. O. FASCIATUS. — Blackish ; elytra pale yellowish ; abdomeu 

 reddish-yellow, obsoletely fasciate with dusky. 



Inhabits Missouri. 



Body blackish, punctured, hairy: head black, impunctured, 

 covered with very minute granules : antenntC and moutli testa- 

 ceous ; mandibles piceous : thorax piceous-black ; rather large 

 distinct punctures ; posterior edge rounded without angles, and 

 distinct frum the elytra: elytra, pale yellowish, dusky at the in- 

 terior base and suture; numerous rather large distinct punctures; 

 tip obtusely rounded : beneath reddish-brown : feet rather paler : 

 tergum reddish ; segments each with a definite, dusky band at 

 tip : venter, each segment with an obsolete blackish transverse 

 line on the middle. 



Length less than three-twentieths of an inch. 



Found near Engineer Cantonment. 



ALEOCHARA Gravenh. 



A. IJIMACULATA. — Black; elytra each with an obsolete, yel- 

 lowish, subsutural spot behind. 



A. bhnarnlatn Knoch in Melsheinier's Catalogue. 



Body black, slightly punctured, hairy : front each side exca- 

 vated from the insertion of the antennae to the mouth : palpi pale, 

 maxillarios dusky above : thorax each side and angles regularly 

 rounded, slightly hairy ; two longitudinal, dilated, hardly im- 

 pressed, punctured lines behind : scutel transversely triangular : 

 elytra not covering half of the tergum, with very numerous, pros- 

 trate hairs; a large obsolete, yellowish, subsutural spot at the tip 

 of each : feet dark piceous towards the tips. 



Length less than one-fifth of an inch. 



Found above Fort Osage. [158] 



1823.] 



