192 Harris on the genus Cychrus, . 
Spuzropervs is rather better entitled to be con- 
sidered as a legitimate genus, both from the structure of 
the first pair of tarsi in the males, and from the orbicu- 
lar or heart-shaped form of the thorax. .There are, 
however, species of Cycurus, which approach more or 
less closely to this genus in the form of the thorax. In 
Cycurus the first joint of the anterior tarsus is nearly 
twice the length of the second, which is also elongated, 
narrowed at base, and nearly triangular. In SemxRop- 
ERUS, the first joint is not much longer than the second, 
and is nearly as wide as it is long ; while the second 
joint is transversely quadrate. This character was first. 
pointed out by Knoch, in his * Neue Beiträge,” and is 
represented on the eighth table of his work, where also 
are very correctly figured Cycurus viduus, ScapHino- 
TUS elevdtus, and SPHÆRODERUS stendstomus.* | While: 
on the subject of theTfigures of these American species 
I might observe, that those which have been given of 
them in Say's Entomology, from drawing by Mr. T. 
R. Peale, are very inaccurate. 
In the collection of this society, there i is a specimen 
of Cychrus viduus, which was brought from ‘Florida: by 
Dr. Binney ; and I have compared it with another spe- 
cimen, also from Florida, in the collection ofthe Acade- 
my of Natural Sciences. These insects agree perfectly 
with the description given by Knoch and Say, under 
the name of unicolor, and with that more recently drawn 
up by Dejean under the name of viduus. On com- 
paring these specimens vith our northern species, I 
* Count nds has EEE E to Knoch’s Adash de- 
scriptions of the two latter insects, for what reason it does not pet 
