THE MONTHLY BULLETIN. 11 



INSECTA OR HEXAPODA (Class). 



INSECTS. 



^'ORDERS. 



The following study is based upon the order as a unit of classification. 

 This is done to avoid confusion and to aid in the more systematic study 

 of these important animals. 



The following is a list of orders and suborders, beginning with the 

 lowest : 



1. Thysanura. — Silver-fish or silver moth, spring tails, bristle tails. 



2. Collembola. — Achorutes, Sniinthurus. 



3. Orthoptera. — Earwigs, cockroaches, praying mantids, -walking 

 sticks, grasshoppers, katydids, crickets. 



4. Platyptera. — 



1. Suborder Corrodentia — AVhite ants or termites, psocids or 

 bark lice and embiids. 

 2. Suborder Mallophaga — Biting bird lice. 



5. Plecoptera.— Stone flies. 



6. Ephemerida. — May flies. 



7. Odonata. — Dragon flies. 



8. Thysanoptera. — Thrips. 



9. Hemiptera. — Bugs. 



1. Suborder Homoptera — Cicadas, plant lice, scale insects, white 



flies. 



2. Suborder Heteroptera — True bugs. 



3. Suborder Parasita — Head and body lice. 



10. Neuroptera. — Lacewings, including brown and green lace- 

 wings so well known as beneficial insects. 



11. Mecoptera. — Scorpion flies (Bittacus sp.). 



12. Trichoptera. — Caddis flies. 



13. Lepidoptera. — Moths and butterflies. 



14. Coleoptera. — Beetles and weevils. 



15. Diptera. — Two-winged flies. 



16. Siphonaptera. — Fleas. 



17. Hymenoptera. — Horntails, sawflies, wasps, bees, and many 

 small and large parasites. 



"This classification is based upon that of Dr. J. W. Folsom. 



