808 
ANNUAL REPORT OF NEW-YORK 
SAY’S IIF.TEROPTEROUS IIEMIPTERA. 
- Differs from marginatus, Nob. in having an obvious groove 
beneath, extending to the venter. The whole inferior [surface] 
also is yellowish, with the usual silvery reflection; the posterior 
depressed margin of the thorax is not so wido as in that species, 
and has no raised line. 
Naucoris, Geoff. Latr. 
1. N. profunda, Oval, dark greenish, rugulous; inferior mem¬ 
brane velvet black. 
Inhab. Mexico. 
The whole surface is covered with a minute, confused rough¬ 
ness ; the form is rather dilated oval: thorax profoundly emar- 
ginate to receive the head; posterior sub-marginal line very 
distinct; lateral margin depressed; posterior angles obtusely 
rounded: hemelytra with the covered membrane deep velvet 
black: tergum dull yellowish with a blackish line on the edge 
and spots on the margin: beneath blackish fuscous: feet green¬ 
ish ; anterior pair of thighs dilated, triangular, ciliated with 
golden hair. 
Length two-fifths of an inch. 
The femorata, Beauv is less dilated, polished, the head laigei, 
and less profoundly inserted into the thorax, the thorax is also 
not marginally depressed and its angles are not obtusely rounded 
as in this species. It was taken by Win. Bennett and presented 
to me by Mr. Maclure. 
2. N. stygica, Black, front quadridentato. 
Inhab. Georgia. 
Body oval, brown-black, rather rough: head crcnate on the 
front so as to form four denticulations: eyes rounded, rather 
prominent: thorax not emarginate before, with a slightly depressed 
margin behind; anterior thighs dilated triangular: hemelytra 
with oblique lines ; they appear united at the suture. 
Length three-tenths of an inch. 
I have but one mutilated specimen which was sent to me by 
Mr. Oemlcr. If I am not deceived by this specimen, the species 
is apterous and the hemelytra are united by a rectilinear sutuje, 
which will require the formation of a separate genus which 4 
may be named Nerthra. 
