CONTRIBUTION TOWARD 

 A MONOGRAPH OF THE LABOULBENIACEiE. PART II. 1 



More than ten years have elapsed since the publication in these Memoirs of the writer's first "Con- 

 tribution toward a Monograph of the Laboulbeniaceae" 2 and during this period material of the family 

 has accumulated so rapidly and so many novelties have been discovered, that he has been tempted to 

 defer from year to year the publication of an illustrated account of the many new species enumerated 

 in the six preliminary papers that have appeared in the Proceedings of the Academy between 1899 and 

 1905. An adequate treatment in a single paper of this mass of material has thus become impracticable; 

 and in order to set some limit to the plates it has been necessary in general to illustrate the species by 

 single figures, or at most two figures of adults, without attempting, except in a few instances, adequately 

 to represent the development, or the variations of the forms considered. In many cases one, or even 

 more plates might well have been devoted to the development and variation of a single species, espe- 

 cially in the genus Laboulbenia. Every effort has been made, however, to give accurate figures, and it is 

 hoped that they may, in connection with the diagnoses, render the determination of the species com- 

 paratively easy. Although it has seemed undesirable to cut the diagnoses, which have all been revised 

 and in many cases rewritten, it has been necessary, in order to reduce as far as possible the expense of 

 publication, to make the preliminary account as brief as possible, and to omit a host index and certain 

 other parts that might well have been included. 



For the purpose of gaining a more complete knowledge of exotic forms the writer has twice visited 

 Europe, and has examined portions of the large collections in the British Museum, the Laboratories 

 of Entomology of the Museums of Natural History at Paris and at Berlin, the Hope Collection at Ox- 

 ford and the Sharp Collection of Staphylinida? etc., at Cambridge, now in the British Museum. Cer- 

 tain forms have also been obtained from the Museum of Natural History at Florence, and the National 

 Museum at Washington. Material is also due to the courtesy of friends and correspondents who have 

 sent insects for examination, while a considerable number of new forms have been obtained by the writer 

 in New England and in Florida. Nearly three hundred and fifty forms are herewith illustrated, in- 

 creasing to about five hundred the total number of species and varieties thus far described, which 

 are included in more than fifty genera. Since the completion of the accompanying plates in 1905, 

 considerably more than one hundred additional new species have already accumulated, derived from 

 various sources; but for the most part gathered by the writer in 1905-6 during a journey in tem- 

 perate South America. It is his expectation to publish figures and descriptions of these new forms 

 with as little delay as possible, and in the meantime he will feel greatly indebted to the kindness of 

 any correspondents who may communicate additional material. He desires in this connection to ex- 



1 This Memoir is numbered IX in the series of "Harvard Botanical Memoirs." 



2 Mem. Am. Acad. Arts and Sci., Vol. XII, No. 3, p. 195-429. Plates 1-26. 



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