286 | [FreBruary, 
A. ruficorne Le Conte, Agassiz’? Lake Superior, 222. 
Found from Lake Superior to Louisiana. The tip of the elytra sometimes be- 
comes rufescent; the abdomen is usually ferruginous, but is sometimes dark co- 
lored; I can find no difference between large and small individuals sufficient to 
warrant their separation; by actual measurement, however, Dr. Melsheimer’s 
type is two-thirds of a line long instead of one-third as stated by him. 
3. A.revolvens, piceum, nitidum, modice convexum, elytris subtiliter 
punctatis, obsolete striatis, stria suturali postice profunda. Long. -14. 
Le Conte, Agassiz’? Lake Superior, 222. - 
One specimen from the north shore of Lake Superior. This species has the 
power of contracting itself into a ball as perfectly as the preceding, and the late- 
ral outline of the elytra is precisely similar; it is very distinct by its less convex 
form, and distinctly punctured elytra. 
B. Corpus subglobatile ; humeri obtusi. 
4.A.pulehrum, nigrum nitidum, valde convexum, capite macula frontali 
rufa, thorace levi margine omni flavo, elytris subtilissime punctulatis, maculis 
utrinque duabus magnis obliquis flavis, antennarum basi pedibusque rufis. Long. 
"09. 
San Jose, California, under oak bark. The elytra are finely punctulate; the 
sutural striais deep and does not extend before the middle; the anterior spot 
commences at the humerus, and becoming narrower, runs obliquely backwards, 
nearly reaching the suture about the middle; the second spot commences below 
the humerus, and forms a broad vitta parallel with the margin, and not reaching 
the suture; the thorax is sometimes black margined with yellow, sometimes yel- 
lew with a round discoidal black spot; the club of the antenne is piceous, be- 
coming rufous at its extremity. 
The left mandible of the male is armed with a long curved horn. 
5. A.difforme, piceum, nitidum, convexum, thorace vix subtilissime 
punctulato, lateribus rufescente, elytris distincte punctatis, stria suturali antice 
abbreviata. Long. -08. 
Phalacrus difformis Le Conte, Agassiz’? Lake Superior, 222. 
Two males from the north side of Lake Superior. The left mandible is armed 
with a long curved horn. ‘The head is distinctly punctured ; the base of the an- 
tennz,and the anterior feet are rufo-piceous; the margins of the elytra are 
rufescent. | 
I have nothing to say in extenuation of my error in placing this species in the 
genus Phalacrus, the form of the anterior coxe, and the filiform tarsi, if looked 
at, would have taught me better. 
The genus Sternuchus Lece., (Agass. Lake Sup. 222) must be suppressed, 
as, on careful examination, I find the ciub of the antenne to be two-jointed; the 
part described by me as the antennz of Sternuchus, appears to be an accidentally 
adhering fragment of another insect. There, therefore, remains no character to 
senarate Sternuchus from Clambus, and the typical species must be called 
Clambus gibbulus; it is the analogue of the European C. armadillo; a 
slightly pubescent species found in Pennsylvania was given me by Mr. Ziegler. 
The genus Clambus, from the appearance of the under surface, may probably 
enter the family Trichopterygia, but as yet its place seems uncertain. 
As an appendix to the present family, it may be proper to describe an insect 
which is placed in many American cabinets under the name ¢ Spherites america - 
nus.’ It is, however, by no meansa Spheerites, nor does it belong to the present 
family, but from its transverse anterior cox, entire prosternum, &c., &c., must 
be placed in the family Nitidulariz, where it forms a new genus. 
Psitopyea Lec. 
Sulci antennales recti divergentes; labrum bilobum; mandibule dilatat», 
apice inflexa, acuminata, utrinque serrulata; palpi breves articulis ultimis ovali- 
bus; mentum parvum breve subpentagonum; tibia compresse modice dilatate ; 
tarsi anteriores dilatati, postici simplices; pygidium nudum. 
