41 
act. Seventh joint of the antennae shorter than the 
sixth, or never longer; the veins of the wings • 
often margined with a dark shading; honey 
tubes very short and sub-obsolete. * Callipterus. 
Tribe JLachnini. 
A. Sixth joint of the antennae setaceous without 
a spur at the tip. * Sip ha. 
AA. Sixth joint of the antennae filiform or clavate, 
often ending in a spur, like a rudimentary sev¬ 
enth joint. 
a. Abdomen bare; fourth or stigmatic vein of the 
front wings nearly straight, or slightly recurved; 
spur or sixth joint apparent. Lachmis. 
aa. Abdomen wooly; spur of the sixth joint wanting 
or minute. ‘ ' " Phijllaphis . 
Sub-family Pemphi<;in.e. 
A. Third discoidal vein of the front wing with one 
fork. 
a. An ten me six-jointed. 
h. Hind wings with two oblique veins. 
bb. Hind wings with one oblique vein. 
ad. Antennae five-jointed. 
AA. Third discoidal vein of the front wings simple; 
antennae six-jointed. 
a. Hind-wings with two oblique veins. 
aa. Hind wings with one oblique vein. f* 
b. Wings deflexed in repose. 
bb. Wings horizontal in repose. 
Schizoneura. 
Glyphma. 
Vctcuna. 
Pemphigus. 
Tetraneurci. 
Aploneura. 
Sub-family CiiermesixvE. 
A. Antennae five-jointed. 
AA. Antennae three-jointed. 
Chermes. 
Ph ylloxera. 
Sub-family Rhizobiix.e. 
A. Antennae seven jointed in the adult. 
cl. Third joint of the antennae longer than the 
fourth; hind tarsi one-jointed. 
aa. Third joint of the antennae not longer than the' 
fourth; hind tarsi two jointed. 
AA. Antennae six-jointed in the adult. 
a. Third joint of the antennae longer than the 
fourth. 
aa. Third joint of the antennae about the same length 
as the fourth. 
AAA. Antennae five jointed, sometimes a minute 
rudiment of a sixth is seen, and sometimes the 
fifth is but rudimentary. 
Trcima. 
Paracletus. 
Forda. 
Hhizobius. 
iJft* 
3 
■jf 
rn* 
£) 
A 
s 
IS* 
wi 
iQ 
1C 
ta 
\> 
it* 
Tychea. 
