250 
REVISION OF THE BUFRESTIDzE OF THE UNITED STATES. 
by the head, which is green, and covered with a tolerably coarse punctuation, having the 
appearance of granulation. I have for this reason considered it as Mr. Gory’s species, 
though his expression “ecusson tres-petit” leaves me in doubt regarding the justice of 
the determination; after careful comparison, I can perceive no difference between the scu- 
tellum of this and several other species which I have placed near it. The carinm of the 
posterior angles of the thorax are one third the length of the thorax and oblique upwards. 
32. A. 1 a c u s t r i s, fusco-ameus, cinerascens, capite convexiusculo, dense fortiter punctato, subcanaliculato, 
tkoracc fortius rugoso, latitudine Laud breviore, lateribus rectis vix impressis, angulis posticis carinis parum eleva- 
tis, basi bifoveato, elytris fortius dense granulatis, apice rotundatis serratis. Long. -20—'23. 
Mas segmento ventrali ultimo truncato emargiuato apice birto. 
Femina segmento ventrali ultimo apiee rotundato. 
Lake Superior, at Lapointe. Readily recognised by the almost entire absence of the 
lateral impressions of the thorax. 
The following species are unknown, or not identified with certainty. 
A. v i 11 a t i co 11 is Randall, Bost. Journ. Nat. His. 2, 38. A. frenatus Gory, Mon. Bupr. 4, 139, tab. 40, 
f. 231. 
A. zernes Gory, vide No. 15. 
A. obsoletoguttatus Gory, vide No. 16. 
A. nigricans Gory, vide No. 29. 
A. virens Gory, vide No. 8. 
A. lateralis Say, Trans. Am. Phil. Soc. C, 1G2: Bvpr. lateralis Say, Journ. Acad. Nat. Sc. Phil. 3, 160. 
A. p u t i 1 1 u s Say, Trans. Am. Phil. Soc. 6, 162. 
A. geminatus Say, Trans. Am. Phil. Soc. 6, 162 : Bvjrr. geminata Say, Journ. Acad. Nat. Sc. I’hila. 3, 163 ; 
vide No. 29. 
GROUP VII. 
We have here very small species, usually of a broad ovate form, though rarely sub- 
linear, in which the antennas are inserted in large cavities narrowing the epistoma, and 
frequently received in deep groves extending below the eyes on to the under surface of 
the thorax. The front is strongly inflexed, and the mouth is applied to the prosternum. 
The mentum is large, triangular and entirely corneous. The prosternum is variable in 
form, being either pointed behind, and not angulated on the sides; deeply cleft; or broad 
and truncate. The mesosternum is very small, with the portions widely separated and 
sometimes hardly visible. The scutellum is triangular, and sometimes very large: the 
thorax is more or less lobed at the base. The legs are capable of being applied closely to 
the body, the tibite are sometimes sulcate for the reception of the tarsi, which are always 
