756 
ANNUAL REPORT OE NEW-YORK 
say’s HBTEROPTEKOUS EEMIPTERA. 
southern species and I have obtained many specimens from 
New Orleans preserved in a solution of muriate of mercury 
Thyreocoris, Schrank. 
1. T. histeroides, Blackish, antenna) dull honey-yellow. 
Inhab. U. S. 
Body oval, greenish-black, polished, with rather small, not 
dense or profound punctures: antennae, dull honey-yellow: feet 
dark piceous. 
Length from over three-twentieths to one-fifth of an inch. 
Resembles T. scarabaeoides Linn, but is larger, the puncturing 
is less profound and not so dense. The lateralis F. has the 
margin of the hemelytra white. It is a common insect and 
varies in magnitude. 
Nuttal presented me with a large individual from Arkansaw. 
2. T. albipennis, Fulvous; hemelytra white. 
Inhab. Missouri. 
Body pale fulvous, oval; head; thorax blackish before and on 
each side; lateral margin white: scutel each side at base with a 
small black spot: hemelytra white with a small rufous spot: 
beneath picous ; lateral margin of the poctus white. 
Length less than one-fifth of an inch. 
This insect is mutilated; but it is a very distinct species. I 
obtained it on the Missouri river, when with Major Longs 
exploring party. 
Edessa Fab. Lat. 
1. E. eruciata , Above with a sanguineous cross. 
Inhab. U. S. 
Body greenish yellow : antenna pale rufous: thorax with a 
sanguineous band on the posterior margin extending upon the 
lateral obtuse angles; hemelytra, the coriaceous poition, with 
the inner and posterior margins, sanguineous, giving the appear¬ 
ance of a cross on the back: beneath yellowish: venter with 
abbreviated’, lateral, slender, sanguinous lines, tip sanguineous. 
Length two-fifths of an inch. 
When the hemelytra are at rest their sanguineous margins 
represent a common cross. 
Curtis gives this genus the name of Acantliosoma, but the 
character upon which it is instituted enters into the natural 
