106 [October, 1S44. 



half of the abdomen, and at suture not much longer than the thorax ; dull 

 rufous, with a common angulated brown fascia, formed like the letter av; 

 tip obliquely truncate : abdomen attenuated posteriorly : feet dull rufous. 



Nitidula, Fabr., Erich. 



1. N. uniguttata. Light brown ; lateral thoracic margins and a spot on 

 each elytrum, cinereous. 1^-1. long. Pennsylvania 



Nitidula biguttata, Melsh. Catal. 



Oblong, light brown, finely and densely cinereous pubescent, minutely 

 and closely punctured : head colored as the disk of the thorax, slightly im- 

 pressed each side near the antennae, which are dull testaceous, with the clava 

 fuscous : thorax transverse, narrowed anteriorly, the sides rounded and 

 slightly dilated behind the middle ; angles subobtuse ; lateral margins yel- 

 lowish-cinereous : elytra not covering the tip of the pygidium, obtusely 

 rounded at apex; each with a small yellowish-cinereous spot in the middle : 

 beneath and feet rufo-testaceous. 



2. N. rufida. Ochraceous ; eyes black. 2 1. long. Pennsylvania. 

 Nitidula rufida, Melsh. Catal. 



Oblong, slightly convex, pubescent, very minutely and confertly punc- 

 tured or shagreened, ochraceous: antennae rufous, with the clava dusky : eyes 

 black : thorax transverse, narrowed in front, the sides slightly rounded ; a 

 transverse impressed line behind the middle of the anterior margin ; anterior 

 angles obtuse, posterior ones acute : elytra more than twice the length of the 

 thorax, not covering the tip of the podex, rounded at apex : feet and beneath 

 yellowish-rufous. Resembles much Epurcea corticina, Erichson, but is always 

 deeper colored, and comparatively narrower than that species. 



Osmosita, Erich. 



1. 0. badia. Pale ochraceous- feet testaceous ; eyes black. 1£ 1. long: 

 1 1. wide. Pennsylvania. 



Subquadrate, subdepressed, very slightly pubescent, densely and minutely 

 punctured, pale ochraceous : head faintly impressed each side between the 

 antennae, which are colored like the body, with the clava broad, fuscous, ex- 

 cepting the first joint, which is dusky rufous : eyes black : thorax transverse, 

 narrowed anteriorly, the sides slightly rounded ; anterior margin strongly 

 notched, posterior one slightly retuse; anterior angles obtuse, posterior ones 

 acute, prominent : scutel densely punctured : elytra more than twice the 

 length of the thorax, obtusely rounded, and almost covering the pygidium ; 

 humeral tubercles prominent : beneath and feet testaceous. 



2. 0. casfanea. Light, or dark ferruginous; pectus fuscous ; eyes black. 

 1^1. long. Pennsylvania. 



Nitidula castaneu, Melsh. Catal. 



Broad-oval, subdepressed, finely and densely pubescent, dark, or light fer- 

 ruginous, with the lateral margins paler ; very finely and confertly punc- 

 tured ; antennas rufous, the two first joints of the club fuscous : mandibles 

 testaceous, tip, and eyes, black : thorax transverse, narrowed anteriorly, 

 slightly so at base, where it is somewhat narrower than the base of the elytra, 



