40 [April, 1844. 



Wide for its length, and its abdomen comparatively shorter than in any of 

 the known native species. Antennae not attaining the apex of the thorax, pale 

 brownish, with three basal joints, and palpi testaceous : head testaceous, with a 

 rufous tinge, and with its sides obsoletely brownish ; front immaculate ; glossy : 

 mandibles rufo-testaceous, blackish towards the tips : thorax color of the head 

 with the sides, and basal edge obsoletely brown, and obsoletely dusky on the 

 middle of the anterior margin : elytra paler than the thorax, with the apical 

 exterior angles blackish ; sculpture as in lateralis : abdomen rufo-testaceous, 

 faintly maculate with brownish, three spots on each segment: glossy : venter, 

 feet and postpectus, pale testaceous. 



This species bears some resemblance to lateralis, Grav., and did not the out- 

 lines of its body differ much from that species, it might be conjectured to be a 

 variety of it. The present specimen is a 9 anu " tne on 'y one ln our collec- 

 tion. 



O.fasciatus, Melsh. Catal. 1320. Testaceous; sides and front of the head, 

 anterior and posterior margins of the thorax, suture and exterior apical angles 

 of the elytra, parapleural, antepectus, and fifth and sixth abdominal segments, 

 black. — Variety of O. vittatus, Grav. 



P^EDERID^E, Erichson. 

 Lathrobium, Gravenhorst. 



l>. longiusculum, Grav. This species varies in its size, but we have never 

 met with a specimen of 6 lines long, as some entomologists state it to be. The 

 usual length is a little less or more than three lines. 



Stilicus, Latr. — Kugilus, Leach. 



S. angularis, Erichson, differs from dentatus, Say, chiefly in the thorax, 

 which is almost glabrous, whilst that of dentatus is distinctly longitudinally 

 rugulose. 



S. tristis. Black; thorax finely carinated ; antennae and feet rugous; 

 posterior margin of the elytra testaceous 2-g I. long. — Pennsylvania. 



Form of dentatus, Say, but considerably larger. Antennas rufous or rufo- 

 testaceous: head much wider than the thorax, orbiculate, densely and minutely 

 longitudinally rugose, black, opake : mouth and its organs piceous: labrum 

 wide, dilated at the sides : thorax much narrower than the elytra, contracted 

 before and behind; convex, finely and confertly rugose; raised dorsal line fine, 

 glabrous ; brownish-black, opake : elytra scarcely longer than the thorax, pitchy- 

 brown, with the apical margin dull testaceous; punctured and somewhat 

 inequal : abdomen black, with the posterior margin of the sixth segment beneath, 

 and very obsoletely above, rufous, and like the head and trunk, minutely 

 pubescent : feet rufous: pectus, and head beneath, black, minutely and some- 

 what closely punctured. 



STENIDiE, Erich. 

 Stenus, Latreille. 

 S. erythropus. Black; palpi whitish; feet rufous; abdomen marginate, 2 1. 

 long. Pennsylvania. 



Lsestris fuscipes, Melsh. Catal. 1345. 



