CLASSIFICATION. 13 



Neuropteroidea, S&udder. 



Family. — Palephemeridse, Scd. 



Genus. — Plat ephemera, Scd. 

 Family. — Homothetidse, Scd. 



Genera. — Aeridites, And.; Eucsenus, Scd.; Genopteryx, Scd.; Genentomum, Scd.; 

 Didymophleps, Scd. ; Homothetus, Scd.; Mixotermes, Sterzel ; Omalia, 

 van Ben. 

 Family. — Palseoptei'ina, Scd. 



Genera. — Miamia, Scd. ; Dieconeura, Scd.; Strephecladus, Scd. 

 Family. — Xenoneuridae, Scd. 



Genus. — Xenoneura, Scd. 

 Family. — Hemeristina, Scd. 



Genera. — Lithomantis, Woodw. ; Lithosialis, Scd.; Pachytylepsis, de Borre ; 

 Lithentomum, Scd. ; Hemeristia, Dana. 

 Family. — Gerariua, Scd. 



Genera. — Polyernus, Scd. ; Gerarus, Scd. ; Adiphlebia, Scd.; Megath&ntomum, Scd. 



Hemipteroidea, Scudder. 



Genera. — Eugereon, Dolirn ; FiilgoHna, Goldenb. 



Coleopteroidea, Scudder. 



Palaeodictyoptera having a coleopterous aspect indicated l>y Geinitz and Brongniarfc. 



B.— HETEROMETABOLA, Packard. 

 Orthoptera, Olivier. 



Family. — Forficularise, Latreille. 

 Family. — Blattaria?, Latreille. 



Genera. — Neorthroblattina, Scd.; Scutinoblattina, Scd.; Blaitidium, Westw. ; 

 Mesoblattina, Gein. 

 Family. — Mantidse, Latreille. 



Genus. — Mantis, Linne. 

 Family. — Phasmidse, Leach. 



Genera. — Agathemera, Scd. ; Pseudoperla, Pictet. 

 Families. — Acridii, Latreille; Locustidse, Latreille; Giyllidse, Latreille. 



Neuroptera, Linne. 



Sub-order. — Pseudoneuroptera, Erichson. 

 Sub-order. — Neuroptera vera. 



Hemiptera, Linne. 



Homoptera, Latreille. 

 Heteroptera, Latreille. 



COLEOI'TERA. 



C— METABOLA, Packard. 



DlPTERA. 



Lepidoptera. 

 Hymenoptera. 



A modification of this classification was introduced by Handlirsch, in his 

 "Sub-phylum Insecta " in Eastman's translation of Zittel's 'Text-book of 

 Palaeontology,' 1913, as follows: 



