venation is very puzzling, being- of a very reduced type, not 

 like that of the Isoptera, but perhaps related to the very archaic 

 Psocopterous type still preserved in the genus Aiiiphieiitoiiiiiiii. 



Order Perlaria or Peecoptera. 



A series of archaic genera from Australia and New Zea- 

 land, representing the two families Eusthoiiidac and .lus- 

 troperUdae. 



xA.fter studying the Stonetlies of Australia and New Zealand 

 for many years, it has at last become possible to offer a new 

 classification of this Order, based on the recognition of the 

 existence of a very archaic Antarctic fauna, now confined to 

 Australia, Tasmania, New Zealand, and Chile. Of these, the 

 Eiistlieiiiidae appear to be the i)rimitive Perlid stock; since, on 

 a calculation based on sixteen important characters used in 

 classification, they are 100 per cent archaic. The genera are: 

 Eiist/icn'ia, with many species in Tasmania and A'ictoria ; 

 Stenopcrla, with one widely distributed species in Xew Zea- 

 land; Diamphipiioa, with one species of great size in Southern 

 Chile ; and two new genera from Australia, not yet described. 

 All these were exhibited except Diamphipiioa. The Austroper- 

 lidac, specialized by reduction of the ccrci and by some slight 

 alterations in the venation, contain only the two genera Ans- 

 tropcrla from New Zealand and Tasmanopcrla from Tasmania. 



A third family of archaic Perlaria. not exhibited, are the 

 Lcptopcrlidae, which is represented by many genera throughout 

 Australia, Tasmania. New^ Zealand, the Sub-antarctic Islands, 

 and South America as far as P>razil. 



The Perlaria of the Northern Hemisphere possess no repre- 

 sentatives of these three families, but consist exclusively of more 

 highly evolved families representing two separate lines, of 

 which Pteronarcidac and PcrUdac form one, arising from 

 Eustheniid-like ancestors, and the Xcinuridae and Capiiiidac 

 the other probably arising from an old Tx'ptoperlid stock. 



Order Comioptera. 



A tube containing the larva, pupa and imago of the archaic 

 beetle Ciipcs concolor Westw. from \'irginia. Fossils closely 



