HEMIPTERA HETEROPTERA. 
165 
9 Head not deflexed. Male . — Anal segment of 
moderate size. Female . — Sixth ventral seg- 
ment truncated, not elongated. 
§ Outer border of the corium much longer than the 
suture of the clavus. 
X Third and fourth joints of the antennae not nearly 
of equal length. - 
X X Third and fourth joints of the antennae equally 
long or nearly so. - 
§§ Outer border of the corium and suture of the 
clavus nearly equally long. 
X Third and fourth joints of the rostrum as long as 
the second or a little longer. 
X X Third and fourth joints of the rostrum much 
longer than the second. 
o Head not received into the prothorax as far as the 
eyes. - 
OD Head received into the prothorax as far as the 
eyes. - 
** Fore wings sometimes abbreviated and without 
a membrane; apical border of the corium 
rounded. 
j- First joint of the rostrum longer than the head. - 
It First joint of the rostrum shorter than the head. - 
bb. Fore wings abbreviated, truncated. 
The above author uses the following method in 
Vetenskaps-Akademiens Handlingar, 1870: — 
Roscius. 
Melamphaus. 
Odontopus. 
Dindymus. 
Dysdercus. 
Pyrrhocoris. 
ScANTIUS. 
Dermatirnes. 
Kongliga Svenska 
LARGINA. 
A. Head with no longitudinal furrow beneath. 
a. Hind part of the head between the eyes trans- 
versely concave or nearly flat. 
* Fore coxae armed with a spine. - 
** Fore coxae unarmed. 
f Eyes much peliolated. - 
ff Eyes slightly petiolated or sessile. 
+ Body oblong or narrowly oval. - 
H Body narrow, linear. 
§ Head excavated between the short-petiolated eye. 
§§ Head flat between the sessile eyes. 
b. Head convex above and beneath. 
B. Head with a longitudinal furrow beneath. 
a. First joint of the antennas longer than the head 
and the thorax together. - - - 
b. First joint of the antennae not longer than the 
head and the thorax together. 
* Fore area of the prothorax remote from the fore 
border. - 
** Fore area of the prothorax extending to the fore 
border. - 
Fibrenus. 
Astemma. 
Largus. 
Theraneis. 
Stenomacra. 
Arhaphe. 
Macrocheraia. 
Iphita. 
Physopelta. 
