HEMIPTERA HETEROPTERA, 
tt 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. 
< Third and fourth joints of the antenne not nearly 
of equal length. - - - - 
xX Third and fourth joints of the antenne aia 
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. - = 
xX Third and fourth joints of the rostrum much 
longer than the second. 
o Head not received into the prothorax as far as the 
eyes. = z = 2 i 
oo Head received into the prothorax as far as the 
eyes. - - - - - 
** Fore wings sometimes abbreviated and without 
a membrane; apical border of the corium 
rounded. 
+ First joint of the rostrum longer than the head. 
tt First joint of the rostrum shorter than the head. - 
bb. Fore wings abbreviated, truncated. - - 
165 
Rosctus. 
MeELAMPHAUS. 
Oponropus. 
Dinpymus. 
DyYsDERCUS. 
PyrruHocoris. 
ScANTIUS. 
DERMATIRNES. 
The above author uses the following method in Kongliga Svenska 
Vetenskaps-Akademiens Handlingar, 1870 :— 
LARGINA 
A. Head with no longitudinal furrow beneath. 
a. Hind part of the bead between the eyes trans- 
versely concave or nearly flat. 
* Fore coxe armed with a spine. - - - 
** Fore coxe unarmed, 
+ Eyes much petiolated.  - - - - 
++ Eyes slightly petiolated or sessile, 
t Body oblong or narrowly oval. - - - 
tt 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 antenne longer than the head 
and the thorax together. . - = 
b. First joint of the antenne 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. 
MacrocHERAala. 
IpPHITA. 
PuysopeLra. 
