THE 



AMERICAN NATURALIST 



Vol. LT. May, 1917 No. 605 



STUDIES UPON THE BIOLOGICAL SIGNIFI- 

 CANCE OF ANIMAL COLORATION 



11. A Eevised Woeking Hypothesis of Mimicry 

 1)H. W. IT. LOXdLKV 

 GoucHER College, axd Dkpaktmkni' ov Makini; I'.kh.ocy. Carnegie 



Although zoologist < know tlmt detailed resemblance 

 in outward ap])( arancc may occur between different 

 species of insects wliidi ai'c not closely related, tliey do 

 not aii-ree in their inter]. rotation of tlic facts they observe. 

 l^vMMit knowlodiic. in<lccd. Ju^ilic^ notliin- nn.rc ilian 

 tontatlvo cxplannlioii^ ..f niiniiri> : ImU. in lli- iimILt. ob- 

 MTNation^ rcrcntlx irp-'ftcd' liiihl nnv'- fuvdciii of 

 clioirc. >in.-.- Ilicy appear to bcai' directly upon the x aliditv 

 of nil lent lixpolheM- le\Ie\\ed in the follouinu p;^,-. 



'I'lie first attempt to interpret mimetic resemblance as a 

 result of natural selection was made by H. W. Bates,- who 



