.-: 8 PSYCHE. [April iqoo. 



Now tluit tlie study of wing develo|iiiient ciiticiMii of iiicoinpleleiiess «hich does no 

 proinit.es to dispel the uncei taintv which has have sufficient regard lor the evidence de- 

 characterized our theories of venation, tlie rived from fossil forms. 



palaeontological evidence will gatlier new Tlie sul:)stantial progress which Comstock 



interest in proportion as the data t'rom and Needham have inaugurated ought to 



recent insects become nioie definite. In stimulate many others to continue the same 



fact, no tlieorv of venation can escape the line of study. 



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