pfdcrifitiona of new J^orth American 
INSECTS, and obsefwatioris on some 
already described. 
By Thomas Say, 
(Conanued from pag^ 67.) 
CASNONIA, Xa?r. 
C. rufifies^ Dej. The insect of this 
genus, represented by Drury (Ins. 1, 
pi. 42, f. 4 & 6,) is probaly a variety 
of this species. Dejean has not no- 
ticed this figure at all. The Gaierita 
amcricaria is represented in the same 
plate. 
SPHERACRA, Say. 
Ely trk entire; iihm emarginate; 
terminal Jojnt of the tarsi profoundly 
bilobated ; nails simple ; head as long 
behind the eyes as before them ; tho* 
rax subcylindric; anteimss much shor- 
ter than the body ; basal joint much 
shorter than the head^ joints, except-: 
ing the second not very unequal in 
length, subejlindric ; labrum femar^ 
ginate ; imipi with the terminal joint 
someurhat fusdform, subacute s men- 
turn whh a prominent, acute central 
tooth. 
S* donalisi f abr, Black $ elytra 
striate, testac^us ; iuture brOadljr 
black. 
Ihhab,;C^iT>lin8. Mual M Bbsc. 
Smaller than O. mgmgd^a. Aa- 
teim* testaceous § head black, pbllsh^ 
ed, broader than the thorax ; thorfik 
cylindrical, obscurely ferruginous 
elytra sttiate^estaceOftS, suture broad- 
ly black, hardly attaining the tip ; 
body blabk, feet testaceous?^ Fabr, 
'OdaCUhtha dorsalis. \Fabr. Syk. 
Elemh. 1,^29, 
In my specimen the head oidy i^ 
black, or rather of so deep a rUfous 
as to appear black, excepting the 
iip and base* 
This well known species re-* 
ferred by its discoverer Fabridus, to 
his Genus Odacantha ; in which ar- 
rangement he was followed by De- 
jean, who, however, was fully aware 
of its generic difference from the O. 
mdanura^ Fabr. Dejean in his obser- 
vations on the genus, says, “ that in 
consequence of the Joints of the tarsi 
being less filiform, than those of the 
type of the genus, almost triangular, 
the penultimate one deeply bilobatc 
and the extremities of the elytra 
rounded, it would be perhaps proper 
to make a new genus of this insect.** 
In this remark I perfectly coincide, 
as I cannot see the propriety of Join- 
ing, in the same genus, two Insects 
whose characters, in the artificial sys- 
tem place them in different families, 
though it cannot be denied that they 
have many, more intimate, natural 
affinities, 
I had written the above with the 
expectation of introducing a new spe- 
cies, in an insect which in form and 
colour, resembles the dorsalis, 
ceMingly to the eye, excepting in 
si^e,but on close examination it proves 
to tieWridelf distinct. 
CYMINDIS,Z.«fr.2}ey. 
4, C. filaiiCQtlw,BkY, (Lebia) Trans. 
Amer. Philos. Soc. voL 2, new series. 
This species has been since describ- 
ed by Dejean under Ihe name of C. 
complanata. In my specimens the 
palpi are hardly dflat^. It varies 
in having the thortx darker and of 
the colour of the head. ' I obtain^ 
an liidiviaua! in Indiana. 
2. C. latkoltis, 6lackish ; thorax 
trahsveVSe ; feet pde rufous ; elytra 
with slender stri« and minute punc- 
tures, 
