j^ 321. THE INSECTA. 399 



C. Insects with complete Metamorphosis. 



[Insecta holometabola.) 



1. Mouth Suctokial. 



a. Two wings. Under lip changed into a suctorial organ. 



ORDER IV. DIPTERA. 



Families : Pülicidae, Nycteribidae, Hippoboscidae, Muscidae, Oestridae, 

 Sykphidae, Conopidae, Stomoxydae, Bombylidae, Anthracidae, Lep- 

 TiDAE, Henopidae, Asilidae, Stratiomydae, Tabanidae, Tipülidae, 



CüLICIDAE. 



b. Four scaly wings. Maxillae changed into a suctorial organ. 



ORDER V. LEPIDOPTERA. 



Families : Tineidae, Pyralidae, Geometridae, Noctuidae, Bombycidab, 

 Hepiolidae, Zygaenidae, Sphingidae, Papilionidae. 



c. Four naked wings. Tongue changed into a suctorial organ. 



ORDER VI. HYMENOPTERA. 



Families: Apidae, Andrenidae, Vespidae, Fobmicidae, Scoliadae, 

 MuTiLLiDAE, Pompilidae, Crabonidae, Bembecidae, Chkysididae, 

 Cynipidae, Ichneumonidae, Siricidae, Tenthredinidae. 



2. Mouth Mandibulate. 



a. Two posterior wings only. 



ORDER VII. STREPSIPTERA. 



b. Four membranous wings. 



ORDER VIII NEUROPTERA. 



Families : Phryganidae, Sialidae, Hemerobidae, Myrmeleonidae, 

 Rhaphidiadae, Panorpidae, Mantispidae. 



c. Two upper wings corneous, and two under membranous. 



ORDER IX. COLEOPTERA. 

 Families : Pselaphidae, Coccinellidae, Chrysomelidae, Cerambycidae, 



CURCULIONIDAE, CiSTELIDAE, MeLOIDAE, TeNEBRIONIDAE, PyROCHROIDAE, 



Elateridae, Lamellicornes, Clavicornes, Hydrophilidae, Hydrocan- 



THARI, StaPHYLINIDAE, CaRABIDAE. 



