204 REVISION OF THE BUPRESTID OF THE UNITED STATES. 
the scutellum is very transverse, and truncate, with the posterior angles well marked. 
Lacordaire adds other slight differences, but some of them are now to be rescinded, 
since the elytra are caudate in P. cyanipes, and the prosternum is not canaliculate in 
several species of Dicerca. The characters drawn from the antenne, of which the 3rd 
joint is twice as long as the 2nd, and the 4th is triangular, and nearly as broad as the 
5th, still continue good. Our species are all marked with a smooth dorsal thoracic line, 
the antennal cavities are connected by a slight ridge, and the prosternum is hairy, charac- 
ters never seen in Dicerca: 
Elytra prolongata, integra - - - - - - P. cyanipes. 
(Hlytra prolongata bidentata - - - - - - P. erecta.) 
Klytra haud prolongata, bidentata. 
Elytra depressa - - - - - - - P. ferrea. 
Elytra sequaliter convexa ; 
Abdomen apice emarginatum - - - - - P.thureura. 
Abdomen (% ) apice integrum - - - - - P. debilis. 
1. P. cyanipes. Buprestis cyanipes Say, Journ. Acad. Nat. Se. 3, 164. 
Missouri, Mr. Maurice Schuster; New York, Mr. Akhurst. 
2. P. erecta. Buprestis erecta Gory & Lap. 4, 110; tab. 19, f. 108. 
Unknown to me; it seems related to the preceding, but the sides of the thorax of the 
figure are more rounded, and the tips of the elytra are bidentate. 
3. P. ferrea, depressa, griseo-eenea, capite linea occipitali leevi, thorace transverso antrorsum angustato, late- 
ribus medio subangulatis, costa dorsali leevi, callo utrinque antico, alteroque basali parum distincto, grosse subcon- 
fluenter punctato, versus latera late impresso, elytris striis hic inde praecipue introrsum distinctis punctatis, spatiis 
magnis punctatis, alterisque elevatis levibus obscurioribus notatis, postice attenuatis bidentatis. Long. -6. 
Mas abdominis segmento ultimo profunde et late emarginato; prosterno hirto. 
Dicerca ferrea Mels. Proc. Acad. 2, 144. 
One specimen from the Western States, Mr. Wild: others were found by Mr. Schuster 
in Missouri. This species differs from P. thureura by the narrow form, and more flat- 
tened thorax and elytra: the sides of the thorax diverge a little from the base, so that the 
widest part is about the middle. 
4. P.thureura. Buprestis thwreura Say, New Ins. of Louisiana, 3. 
Buprestis costicollis Gory & Lap. 4, 109, tab. 19, f. 107. 
Very abundant in Louisiana. The prosternum of the male is very hairy, and the 
last segment of the abdomen broadly and deeply emarginate. In the female the same seg- 
ment is very slightly emarginate. 
5. P. debilis, cupreo-znea, thorace subtransverso, a basi antrorsum angustato, lateribus late rotundatis, rude 
punctato, costa dorsali latiuscula levi, alteraque utrinque vix distincta, elytris striatis, praecipue confertim punc- 
tatis, spatiis obscuris lavibus variegatis, ad apicem truncatis vix bidentatis, abdominis apice integro. Long. -48. 
