REVISION OF THE BUPRESTIDiE OF THE UNITED STATES. 
247 
Laporte and Gory, Mon. Bupr. 2, 38, tab. 9, f. 50. 
Af/rilus acutipcnnu Mann. Enum. Bupr. 109: Gory, Mon. Bupr. 4, 225, tab. 37, f. 216. 
Aijrilus quadriimpressus Ziegler, Proc. Acad. Nat. Sc. 2, 267. 
Middle and Southern States, Kansas. 
19. A. torpidus, obscurus, senescens, capite piano pubescente confertiin punctato, postice canaliculato, tbo- 
racc rugose punctato, dorso late sulcato, latcribus late rotundatis oblique iinpressis, angulis postieis longe carinatis, 
clytris dense subtilius granulatis, apico angustius rotundatis, serratis. Long. -37. 
Lake Superior and Illinois. The elytra have a very faiut discoidal costa, hut. 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, aenescens, vel virescens, capite planiusculo, vis pubesceute confcrtim punctato, 
postice canaliculato, tborace rugose punctato, dorso late sulcato, et bifoveato, lateribus rotundatis iinpressis, augulis 
postieis 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, tborace rugose punctato, dorso late sulcato, ct bifoveato, lateribus 
rotundatis iinpressis, augulis postieis obtuse carinatis, elytris dense subtilius granulatis, apice serratis obtuse ro- 
tuudatis. 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. plumbous, prtecipue plumbeo-acneus, obscurus, capite piano, vix pubescente, confcrtim punctato 
postice baud vel vix canaliculato, tborace rugose punctato autice latiore, lateribus rotundatis postice subsinuatis 
vix iinpressis, angulis postieis 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. 
