and Classification of Rhynchota. 233 
m Cocci to the true Cicade, in one and the same direction, 
the lowest stage being characterized by sedentary habits (with 
alance, causing the fantastic appearance of many Fulgoride 
and Membracide. 
mongst Heteroptera, on the other hand, some are ex- 
clusively blood-suckers ; others subsist both on vegetable and 
on animal juices; and they exceed therefore the Homoptera 
in nes of form, Some are Trochalopoda, others Pagio- 
a. 
number of joints, this really only means that the basal joints 
are small, partly hidden by the projecting parts of the fore- 
head, and not counted. I consider it far more natural to de- 
termine the steps of this series by the position of the antenna, 
which depends on the different degree and the direction of the 
expansion of the head—that is, by the marks pointed out by 
abricius and Latreillej—the antenne being either inserted 
