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THE AMERICAN NATURALIST [Vol. XLI 



mutants, as we should now call them. They have, in fact, every 

 appearance of belonging to a category of color forms similar to that 

 of the albino mammals and birds and certain kinds of white-flower- 

 ing plants. If there were need of coining new words, we might 

 call the pink individuals cases of rhodism and the brown ones 

 cases of phaeism. 



Conclusive proof of the correctness of this view can be obtained 

 only by experimental breeding. On the sport or mutation hypothe- 

 sis we should expect pink individuals mated inter se to produce only 

 pink individuals, and the same should result midafis miiiandis ni 

 the case of the brown forms. Pink or brown individuals crossed 

 with the common green form may be ex])e(ted to giv(> (tlLpring 

 in the Mendelian proportion, with the pink and brown characters 

 acting as recessives. Perhaps some student at the IVIarine Biologi- 

 cal Laboratory at Woods Hole, where pink individuals of Amhly- 

 corypha ohlongifolia seem to be less rare than in other localities, 

 may find it worth while to perform these and other experiments 

 for the purpose of determining the inheritance value of the charac- 

 ters above discussed. 



Postscript 



Since the foregoing paragraphs were sent to the "Xaturahst" 

 two additional captures of ])ink And>liivnr>ipha ohlmujijoiia 1ki\<' 

 been recorded: 



No. 2S. A female taken August lo, l'.»()7, by Dr. .1. N. Kn>c, 

 in the New York Botanical (iarden and })resented to the National 

 :VIuseum, is cited by Knab (1007), who also mentions two brown 

 specimens of this same species, one from Springfield, Mass., and 

 another from Dorsey, Md. (August 20, Miss U. Jo,ies,. Knal) 

 calls attention to the pink and green caterpillars <,f the snnH> .prcics 

 as analogous to the pink and green katydid-^, and (•onciu.lc.s tliat 



