PROCEEDIN^GS. 1017 29 



which prevails toda}- in the case of those of Europe and Palaarctic 

 Eastern Asia. Since there was also a similar condition of affairs in the 

 Tertiar}', we may conclude that insects were repeatedly given the oppor- 

 tunity of passing- between Eurasia and North America." 



REFERENCE LITERATURE 



1. Heer, O. Die Insecten fauna der Tertiargebilde von Oeningen 

 und von Radoboj in Croatien. 3 th. 644 pp., 40 taf. From Neue Denks. 

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2. Handlirsch, An. Insects from the Tertiarj- Lake Deposits of 

 the southern interior of British Columbia. Contributions to Canadian 

 Palaeontology. Vol. II.. pt. 3 (Canadian Fossil Insects), Geological 

 Survey. Dept. of Mines, Ottawa. 1910. 



3. Handlirsch, A. Die Bedeutung der fossilen Insekten fur die 

 Geologic, pp. 503-522. Mitteilungen der Geologischen Gesellschaft, 

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4. Handlirsch, A. Uber einige Bezienungen zwischen Palae- 

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5. Scudder, S. H. Systematic Review of our Present Knowledge 

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 1886. 



6. Brongniart, C. Recherches pour servir a I'histoire des insects 

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7. Carpenter, G. H. The life-story of Insects. Cambridge. 1913. 



8. Sharp, D. Insects, Pt. I. Cambridge Natural History, London, 

 1910. 



9. Folsom, J. W. Entomology. Philadelphia, 1906. 



10. Kellogg, V. L. Distribution and species-forming of Ecto- 

 parasites. Amer. Naturalist. \'ol. XLV'IL. 1913. 



