REVISION OF THE BUPRESTID OF THE UNITED STATES. 247 
Laporte and Gory, Mon. Bupr. 2, 38, tab. 9, f. 50. 
Agrilus acutipennis Mann. Enum. Bupr. 109: Gory, Mon. Bupr. 4, 225, tab. 37, f. 216. 
Agrilus quadriimpressus Ziegler, Proc. Acad. Nat. Se. 2, 267. 
Middle and Southern States, Kansas. 
19. A. torpidus, obscurus, eenescens, capite plano pubescente confertim punctato, postice canaliculato, tho- 
race rugose punctato, dorso late suleato, lateribus late rotundatis oblique impressis, angulis posticis longe carinatis, 
elytris dense subtilius granulatis, apice angustius rotundatis, serratis. Long. -37. 
Lake Superior and Illinois. The elytra have a very faint discoidal costa, but hardly 
so obvious as to attract attention. This species is to be distinguished from the next two 
species by the pubescent front, and strongly carinate thoracic angles. 
20. A. anxius, obscurus, seenescens, vel virescens, capite planiusculo, vix pubescente confertim punctato, 
postice canaliculato, thorace rugose punctato, dorso late suleato, et bifoveato, lateribus rotundatis impressis, angulis 
posticis vix obsolete carinatis, elytris dense subtilius granulatis, apice serratis obtuse rotundatis, et brevissime ac- 
uminatis. Long. -35—-41. 
Gory, Mon. Bupr. 4, 226, tab. 37, f. 217. 
One specimen from Massachusetts, Dr. Harris; another larger specimen in the col- 
lection of Mr. Ulke. Differs from the next species by the longitudinal furrow of the head 
being longer and deeper, and by the posterior thoracic angles being less distinctly carinate ; 
the elytra have a very faint discoidal costa, they are less narrowed behind, the tip is more 
broadly rounded, with a very short prominent point at the middle; the head of the smaller 
specimen is tinged with purple, and the thorax is more brassy than the elytra. 
21. A. gravis, obscurus, supra subplumbeus, capite planiusculo, vix pubescente, confertim punctato, postice 
canaliculato antice vage transversim impresso, thorace rugose punctato, dorso late sulcato, et bifoveato, lateribus 
rotundatis impressis, angulis posticis obtuse carinatis, elytris dease subtilius granulatis, apice serratis obtuse ro- 
tundatis. Long. -37—-40. 
Lake Superior and New York. This and the three preceding species, are to be distin- 
guished from the next two, by the sides of the thorax being strongly impressed, and the 
head more or less channeled; the characters above given will separate each from the 
others. 
22. A. plumbeus, precipue plumbeo-zneus, obscurus, capite plano, vix pubescente, confertim punctato 
postice haud vel vix canaliculato, thorace rugose punctato antice latiore, lateribus rotundatis postice subsinuatis 
vix impressis, angulis posticis breviter carinatis, transversim vage impresso, elytris dense subtilius granulatis, apice 
obtuse rotundatis serratis. Long. -27—-37. 
Middle and Western States, and Lake Superior; abundant. An easily distinguished 
species, varying somewhat in colour and in the impressions of the thorax; the latter is 
sometimes vaguely channeled, and nearly always has a faint transverse impression about 
the middle; the concave margin is narrower than in the preceding species, owing to the 
less development of the lateral impression. 
