426 NORTH AMERICAN INDEX FOSSILS. 



1903-1907. Sellards, E. H. Papers on Palaeozoic Insects, Ameri- 

 can Journ. Science, 4th series, vol. 15, pp. 307-315, 2 plates; vol. 

 16, pp. 323-324; vol. 18, pp. 113-134, 213-227, 37 figs.; vol. 22, 

 pp. 249-258, 1906; vol. 23, pp. 345-355. 1907; vol. 27, pp. 151- 

 173, 1907. 



1906. Handlirsch, Anton. Revision of American Palaeozoic In- 

 sects, Proceed. U. S. Nat. Museum, Vol. XXIX., pp. 661-820, 109 

 text figures. 



1906-1908. . Die Fossilen Insekten, und die Phylogenie der 



recenten Formen, Ein Handbuch fijr Palaontologen und Zoologen, 

 2 Bande, Leipzig. 



1906-1908. Cockerell, T. D. A. Descriptions of Tertiary Insects, 

 Bull. Museum Comparative Zoology, 1906, 50, p. 41 ; Bull. Amer. 

 Mus. Nat. History, 24, p. 64 et seq., 1908; American Journal of 

 Science, 1908, vol. 25, pp. 51-52 ; 227-232; 309-312. 



1908. Sellards, E. H. Cockroaches of the Kansas Coal Measures, 

 and of the Kansas Permian, University Geological Survey of Kansas, 

 Vol. IX., pp. 501-541, pis. LXX.-LXXXIII. 



A. Paleozoic Insects. 

 Classification. Handlirsch divides Palaeozoic insects into the 

 following sixteen orders; those marked v^ith an anterisk (*) have 

 American representatives: i.* Pal^odictyoptera. 2.* Mixo- 



TERMITOIDEA. 3. ReCULOIDEA. 4.* PrOTORTHOPTERA. 5.* PrOTO- 

 BLATTOIDEA. 6. MaNTOIDEA. 7.* BlATTOIDEA. 8.* HaDENTO- 



AioiDEA. 9.* Hapalopteroidea. 10. Perloidea. II.* Proto- 



DONATA. 12. PrOTEPHEMEROIDEA. 1 3. PlECTOPTERA. I4.* MeGA- 



secoptera. 15. Protohemiptera. 16. Pal^ohemiptera. 



The Pal^odictyoptera are considered to be the stem group, 

 from which all others are derived. This order appears first in 

 the Pottsville in America, and in the Little River Group of New 

 Brunswick. This group is placed in the Kanawha series, though 

 many Canadian geologists regard it as Devonic. All the orders 

 became extinct at the end of the Palaeozoic with the exception of 

 the Blattoidea and Plectoptera. 



Order PAL^ODICTYOPTERA* Goldenberg. 



Slenderly built insects with four similar membranous wings, 

 independent of each other, not capable of folding, and moving only 



* The characterizations of the orders are taken almost directly from Handlirsch, 

 1906, and 1906-08. 



