HEMIPTERA. 21 
arises from the front ; the elytra are membranous at the ex- 
tremity, and the first segment of the trunk, much larger than 
the others, alone forms the thorax. 
The elytra and wings are always horizontal or slightly in- 
clined. 
This section is composed of two families. 
FAMILY I. 
GEOCORIS #. 
In this family the antenne are exposed, longer than the 
head, and inserted between the eyes, near their internal mar- 
gin. There are three joints in the tarsi, the first of which 4 is 
sometimes very short. 
It forms the genus 
Cimex, Lin. 
In some, or the Longilabra, the sheath of the sucker consists of 
four exposed and distinct joints, the labrum is much prolonged be- 
yond the head, subulate, and striated superiorly. 
The tarsi always consist of three distinct joints, the first of which 
is almost as long as the second or longer. These species always 
diffuse a disagreeable odour, and suck the juices of various Insects. 
Sometimes their antenne, always filiform, are composed of five 
joints; the body is generally short, oval or rounded. 
ScureLtera, Lam.—Tetyra, Fab. 
Where the scutellum covers the wholé abdomen. 
S. lineata; Cimex lineatus, L.; Wolf, Cimic., I, ii,2. Length 
four lines; red, longitudinally striped with black above; black 
- points arranged in lines on the venter. Environs of Paris and 
south of Europe, on flowers, the Umbelliferz, particularly(1). 
(1) For the other species, see Fabricius, Syst. Ryngot., genus J'etyra. Accord- 
- ing to Dalman—Ephem., Entom., I—his genus Canopus differs from the preceding 
one in the following characters: the body more inflated, slightly compressed, con- 
