and Classification of Rhynchota. 235 
mal lives under circumstances which in themselves require 
greater flexibility of the body, for instance, in the water, or 
hunting on plants; but if it seeks its prey on an open an 
even surface, the abdomen may be as inflexible as in suckers 
of vegetable juices. "Thus the Joints coalesce along the middle 
of the ventral surface, not only in many Cimices, but also in 
many Zeduvit. In many Lyget, in Nepe, Nabis, Antho- 
coris, &c. the edges of the anterior segments meet on a level, 
whilst the posterior segments are imbricate; but in Capsi all 
the joints are imbricate, and the whole abdomen very move- 
able, &c. These differences afford in several instances useful 
marks for groups and genera. 
The Rhynchota, whichelive as parasites on warm-blooded 
animals and possess a telescope-formed rostrum, are pagio- 
podous, but must, in accordance with their general structure, 
be treated as a separate division, Siphunculata (Latr.), of 
equal value with Heteroptera and Homoptera. 
IV. 
The classification to which the views explained in the 
foregoing necessarily leads entails, in several respects, such a 
thorough revolution in the hitherto received arrangement, 
at it can scarcely look for ready and immediate accep- 
tance by hemipterologists. But nothing will offend them 
more than the demolition of the division of Cryptocerata, which 
hitherto has been looked upon as irremoveably established. 
This division as now accepted is remarkable for uniformity 
in general appearance, and possesses an easy and decisive 
character in the short and hidden antenne; it will there- 
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