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Excerpt from The Hesperioidea of America North of Mexico, Vol. 9Since the time of the early writers who were satisfied to place their skippers in the two genera, Pampkila and Hesperia, the classification of these insects has been in a more or less chaotic state. The two old genera can readily be subdivided, but the structures of the skippers which are useful in their classification are of a peculiarly unstable character and have therefore prov...

Excerpt from Textbook of Evolution and GeneticsIf we look back through the long ages of recorded history we cannot fail to note another analogy in the gradually increasing complexity of society, in the development of mankind from savagery to primitive cultures and finally to the great civilizations which have come and gone. Each stage has contributed to the greatness of its successors, each has added to the complexity of human knowledge, each ...

Excerpt from Textbook of Evolution and GeneticsIf we look back through the long ages of recorded history we cannot fail to note another analogy in the gradually increasing complexity of society, in the development of mankind from savagery to primitive cultures and finally to the great civilizations which have come and gone. Each stage has contributed to the greatness of its successors, each has added to the complexity of human knowledge, each ...

Excerpt from The Problems of EvolutionIt is unnecessary in a study of this kind, which is avowedly an attempt to approach the problems of species formation and general organic evolution in the broadest possible way, to delve into the past history of the subject in detail. Anyone who is interested in it will undoubtedly be thoroughly acquainted with that history so that a general survey may be dispensed with.About the PublisherForgotten Books p...

Excerpt from The Problems of EvolutionIt is unnecessary in a study of this kind, which is avowedly an attempt to approach the problems of species formation and general organic evolution in the broadest possible way, to delve into the past history of the subject in detail. Anyone who is interested in it will undoubtedly be thoroughly acquainted with that history so that a general survey may be dispensed with.About the PublisherForgotten Books p...

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This is a pre-1923 historical reproduction that was curated for quality. Quality assurance was conducted on each of these books in an attempt to remove books with imperfections introduced by the digitization process. Though we have made best efforts - the books may have occasional errors that do not impede the reading experience. We believe this work is culturally important and have elected to bring the book back into print as part of our cont...

Excerpt from The Hesperioidea of America North of Mexico, Vol. 9 Since the time of the early writers who were satisfied to place their skippers in the two genera, Pampkila and Hesperia, the classification of these insects has been in a more or less chaotic state. The two old genera can readily be subdivided, but the structures of the skippers which are useful in their classification are of a peculiarly unstable character and have therefore pr...