November, 1844.] 137 



numerous short hairs ; black: beneath black : feet dark reddish-brown. It is 

 the Scarabaeus imbricatus of Melsh. Catal. 



9. A. maculipennis. Black; elytra testaceous, maculate with black; cly- 

 peus emarginate. — 2§ 1. long. Maryland. 



Oblong, black, shining: clypeus obsoletely trituberculate, pitchy-black, 

 strongly rugulose, with the edge angulate and strongly retuse at apex : thorax 

 punctured, punctures on the disk obsolete, towards the lateral margins, fine, 

 dense and distinct; base obtusely rounded, with the sides slightly rounded ; 

 posterior angles subrectilinear : scutel moderate, piceous, impunctured ; elytra 

 testaceous, with a large lateral spot, two or three small ones behind the base 

 and before the apex, black; suture piceous ; obviously crenate-striate : beneath 

 black : feet chestnut-piceous. Referable to Mulsant's subgenus, Melinopterus. 



Oxyomus, Eschsch. 



I. 0. gracilis. Cylindric, black ; clypeus slightly emarginate; elytra sul- 

 cate ; feet testaceous. 1^ 1. long. Pennsylvania. 



Slender, cylindric, black: clypeus emarginate at apex, minutely and densely 

 punctured, black, with the edge obsoletely rufous or piceous : elytra sulcate, 

 sulci feebly crenate, the interstices narrow; somewhat opake : feet castaneous, 

 with the tarsi lighter. Belongs to the subgenus Pleurophorus, Mulsant. 



2. O. alter nat us. Fuscous or blackish ; four first interstices of the elytra 

 alternating in elevation. — 2\ I. long. Pennsylvania. 



Size and form of Aphodius imbicatus, Melsh. Catal. Clypeus emarginate at 

 apex, finely and confertly punctured, ashy-brown : antennje testaceous : thorax 

 altogether formed as imbricatus, finely and confertly punctured, obliquely and 

 very faintly indented each side of the middle, at base with an obsolete com- 

 mencement of dorsal furrow ; ashy-brown, with the anterior edge dull rufous: 

 scutel small : elytra feebly striate, with the four first interstices alternating in 

 elevation, four lateral ones equal; blackish-brown, opake : beneath and feet black, 

 with the tarsi lighter. 



Tnox, Fabr 



1. T. striatus. Black, glossy ; elytra punctate-striate, with the interstices 

 glabrous; thorax sub-equal, with the sides entire. — 3^ 1. long; If 1- wide. 

 Pennsylvania. 



Trox striatus, Melsh. Catal. 



Above glossy black or piceous : head densely punctured and transverse-rugu- 

 lose, not tuberculate, with the clypeus obtusely rounded and slightly reflexed 

 at apex : thorax numerously and profoundly punctured, with the lateral mar- 

 gins entire, slightly rounded, not broadly depressed; angles acute, with the 

 posterior feebly excurved; dorsal groove terminating in an orbicular indentation 

 behind the anterior margin ; a small and very obtuse indentation each side 

 of the middle ; anterior margin depressed from the angles to near the middle ; 

 elytra profoundly punctate-striate, the interstices not tuberculate, nor tufted 

 with hairs, but simply finely and distantly punctured and somewhat trans- 

 verse-rugulose : feet blackish-piceous. 



2. T. variolatus. Black-fuscous, granulated ; elytra faintly striate, alter- 



