Kinsey: Gall Wasp Genus Cynips 
459 
Mickel, C. E. 
1928. Biological and taxonomic investigations on the mutillid 
wasps. U.S. Nat. Mus. Bull. 143: pp. ix + 351. 
Miller, W. J. 
1920. An introduction to historical geology. New York, D. Van 
Nostrand Co., pp. v + 399. 
Morgan, T. H. 
1928. The theory of the gene. New Haven, Yale Univ. Press, pp. 
xviii + 358. 
Nichols, J. T. 
1928. Re speciation without climatic change or geographic isolation. 
Science 67 : 346-347. 
Osborn, H. F. 
1926. The problem of the origin of species as it appeared to Darwin 
in 1859 and as it appears to us today. Nature 118:270-273. 
1926. The problem of the origin of species as it appeared to Darwin 
in 1859 and as it appears to us today. Science 64:337-341. 
1927. The origin of species, V: speciation and mutation. Amer. 
Nat. 61: 5-42. 
Payne, N. M. 
1925. Can insects survive freezing? Canad. Ent. 57:157-158. 
1926. Freezing and survival of insects at low temperatures. Quart. 
Rev. Biol. 1:270-282. 
1926. Landmarks in the history of the study of insect hiberna- 
tion. Ent. News 37 : 99-101. 
1926. The effect of environmental temperatures upon insect freez- 
ing points. Ecology 7 : 99-106. 
Peattie, D. C. 
1922. The Atlantic Coastal Plain element in the flora of the Great 
Lakes. Rhodora 34: 57-70, 80-88. 
Trelease, W. 
1924. The American oaks. Nat. Acad. Sci. Mem. 20:v + 255, pi. 
420. 
