Feb., 1847.] 167 



brown ; feet pale testaceous ; posterior tibiae very slender; posterior tarsi 

 half the length of their tibiae. Found in Pennsylvania. 



Dibolia, Latr. 



D. cerea. Green above ; antennas, tibiae and tarsi, testaceous. 1 : }1. long. 

 Pennsylvania. 



Altica cerea, Melsh. Catal. 



Oblong-ovate, green and slightly brassy above, shining ; head retracted ; 

 labrum, mouth, palpi and antennae, testaceous, or rufo-testaceous ; thorax 

 obsoletely and distinctly punctulate ; sometimes almost blackish : elytra 

 finely striate-punctate, with the punctures obsolete towards the apex : be- 

 neath and posterior femora, black, shining ; abdomen sometimes reddish- 

 brown ; four anterior feet testaceous, or rufo-testaceous, their femora some- 

 times dusky ; posterior tibiae and tarsi color of the anterior one. 



CH.ETOCNEMA, Steph. 



1. C. minuta. Brassy-black above; basal joints of the antennae tawny- 

 testaceous ; elytra punctate-striate. | 1. long. Pennsylvania. 



Altica minuta, Melsh. MS. 



Ovate, brassy-black above, shining: head minutely and confertly punc- 

 tured ; rather opake ; labrum and palpi, black, glossy ; antennae short, dark 

 fuscous, with two or three, and sometimes four basal joints dull or tawny- 

 testaceous ; thorax very minutely and rather distinctly punctured ; trans- 

 verse, convex, with the sides and base obtusely rounded : elytra convex, 

 with the sides arcuated ; strongly punctate-striate ; exterior interstices con- 

 vex : beneath blackish, slightly brassy, distinctly and remotely punctured ; 

 femora brassy-black ; tibiae and tarsi dull or dusky testaceous, sometimes 

 the apical half the tibiae blackish. 



2. C. semichalchea. Head and thorax brassy-black ; elytra black, punc- 

 tate-striate ; basal joints of the antennae, tibias and tarsi, dull testaceous. 

 1 1. long. Pennsylvania. 



Ovate, glossy: head brassy-black, with a few, small, scattered punctures 

 between and near the eyes ; labrum and palpi, dark dull reddish-brown ; 

 antennae fuscous, with four basal joints testaceous ; chorax brassy-brown 

 or blackish, transverse, moderately convex, with the base obtusely rounded ; 

 the sides almost straight ; finely wrinkled, and rather densely punctulate ; 

 elytra black, punctate-striate ; the exterior interstices convex ; sides arcu- 

 ated ; moderately convex ; beneath black, with the apical segments of the 

 abdomen rugose-punctured ; femora blackish or dark reddish-brown, glossy; 

 tibiae and tarsi, dull testaceous. 



3. C. pulicaria. Head and thorax brassy-black ; elytra black, with a 

 green tinge, punctate-striate ; basal joints of the antennae, tibiae and tarsi, 

 testaceous. 1. long. Pennsylvania. 



Altica pulicaria, Melsh. Catal. 



Ovate ; head brassy-black, hardly punctulate, opake ; labrum and palpi, 

 dull rufo-testaceous ; antenna? rather long, slender, fuscous, with four 

 basal joints testaceous ; thorax color of the head, transverse, with the sides 

 slightly rounded; moderately convex, scarcely punctulate; elytra black, 



