April, 1844.] 51 



Differs from R. impressicollis in the transverse impressions of the thorax 

 which in that species are very distinct, also in ihe basal impressions and in the 

 striae of the elytra being very distinctly punctured : in the impressicollis they 

 are quite smooth. It is a much larger insect. 



20. Rembcs assimilis. Nob. Length 5| lines; breadth 2 J lines. 

 Black, shining; palpi and antennae dark ferruginous brown: head as in the 



preceding: medial line of the thorax deep: anteriorly abbreviated; posteriorly 

 reaching to the base; posterior transverse impression deeply marked in the middle: 

 striae of the elytra punctate: the second not incurved ; third interval with an 

 impressed point in the middle : an indistinct rudiment of a strife at the base 

 between the first and second. Inhabits Georgia. 



At first sight this insect strongly resembles an anisodaetylus, but it possesses 

 all the characters of the genus to which I have referred it. 



21. Chijenius congener. Nob. Length 7 3 lines; breadth 3 lines. 



Head and thorax coppery, with a greenish tint, the punctures on the latter 

 large and confluent. The thorax obcordate, slightly narrowed behind ; medial 

 line deeply impressed, abbreviated anteriorly, and not reaching posteriorly farther 

 than the posterior transverse impression, which is very deep and strongly mark- 

 ed : basal impressions very deep, oblong, rather inclining inwards : elytra black, 

 with a tinge of blue, striae scarcely punctate ; body beneath black, palpi, first 

 three joints of antennas and legs ferruginous. In other respects same as C. 

 cobaltinus. Inhabits Georgia. 



Closely resembles C. cobaltinus,- but is easily distinguished by the transverse 

 posterior impression of the thorax, which is much deeper. The medial line 

 does not extend so far backwards, and the elytral strise are scarcely punctate. 



22. Ch-ljetsivs patruelis. Dej. Cat. Length 6} — 7 lines; breadth 2| — 

 3 lines. 



Above green, beneath black; antenna; and legs ferruginous. Head coarsely 

 punctured, particularly at the posterior part ; frontal impressions distinct. Tho- 

 rax very coarsely punctate, much longer than wide, narrowed before and behind, 

 subcordate, much curved on the sides : medial line on account of the close and 

 deep punctures not very apparent : basal impressions deep and triangular. 

 Elytra much wider than the thorax, covered with a short reddish pubescence; 

 strise punctured ; intervals plane, covered with fine and close punctures. Inhabits 

 Georgia. 



Resembles slightly the sericeus, but is distinguished at first sight by its narrow 

 thorax. 



23. Badister. terminate. Nob. Length 2£ lines ; breadth £ lines. 



Head, thorax, and body beneath black : palpi, antennas, coxas and legs ferrugin- 

 ous, frontal impressions of the head, very large and shallow. Thorax smooth, 

 obcordate, the angles rounded, the posterior less than the anterior: transverse im- 

 pressions well and deeply marked the anterior incurved : longitudinal line entire 

 and deep : rounded posterior margin a little elevated and reddish. Elytra smooth, 

 piceous, with the margin suture, and large spot at the base ferruginous, gradu- 



