2. (Zo["o]l.) In a more restricted sense, the Hexapoda alone.
See {Hexapoda}.
3. (Zo["o]l.) In the most general sense, the Hexapoda,
Myriapoda, and Arachnoidea, combined.
Note: The typical Insecta, or hexapod insects, are divided
into several orders, viz.: {Hymenoptera}, as the bees
and ants; {Diptera}, as the common flies and gnats;
{Aphaniptera}, or fleas; {Lepidoptera}, or moths and
butterflies; {Neuroptera}, as the ant-lions and
hellgamite; {Coleoptera}, or beetles; {Hemiptera}, as
bugs, lice, aphids; {Orthoptera}, as grasshoppers and
cockroaches; {Pseudoneuroptera}, as the dragon flies
and termites; {Euplexoptera}, or earwings; {Thysanura},
as the springtails, podura, and lepisma. See these
words in the Vocabulary.
Note: They are divided into the Heteroptera, including the
squash bug, soldier bug, bedbug, etc.; the Homoptera,
including the cicadas, cuckoo spits, plant lice, scale
insects, etc.; the Thysanoptera, including the thrips,
and, according to most recent writers, the Pediculina
or true lice.