78 IDOLS.-lNSCRIl'riONS.— INSECTS. 



IDOLS. 



Iconol'ogy (Gr. eUcon, an image, and /of/os, a discourse).- 

 Tlie doctrine of imar/cs or emblematical representations. 



INSCRIPTIONS. 



Epigraphies (Gr. epixjrapho, I inscribe). — The science of 

 inscriptions. 



INSECTS. 



Entomol'og'y (Gr. entoma, insects, and 7or/os, a discourse). — 

 That branch of zoology ■\vliich treats of insects, a division 

 of articulated animals having their bodies in three distinct 

 portions, head, thorax, and abdomen ; antennas on the 

 head, three pairs of legs, usually one or two pairs of wings, 

 and aerial respiration. Thus defined, spiders, centipedes, 

 worms, and crustaceans are all excluded fiom the class of 

 insects. 



This class has been divided into fifteen orders, viz. : 



1. Coleop'tera. — The immense order of beetles. 



2. Euplexop'tera. — Earwigs. 



3. Orthop'tera. — Grasshoppers, locusts, crickets, etc. 



4. Thysanop'tera. — Thrips insects. 



5. Neurop'tera. — Dragon-flies, 31 ay-flics, etc. 

 0. Trichop'tera. — Caddice-flies. 



7. Hymenop'tera. — Bees, wasps, etc. 



8. Strepsip'tera. — Bee parasites. 



9. Lepidop'tera.— Butterflies and moths. 



10. Homop'tera. — ^Cicadas, lantern-flies, etc. 



11. Heterop'tera, or Hemip'tera. — Bugs. 



12. Aphanip'tera. — Fleas. 



13. Dip'tera. — Two-winged insects, such as the house-fly, 

 blue-bottle fly, etc. 



14. Anoplu'ra. — Parasites. 



15. Thysanu'ra. — Spring- tails. 



Arachnorogy (Gr. amc/ine, a spider, and locfos, a discourse). — 

 The science or history of spiders and other Arachnida. 



Entomot'omy (Gr. entoma^ insects, and temno^ I cut). — The 

 science of the dissection of insects. 



