CONTRIBUTION TOWARD 
A MONOGRAPH OF THE LABOULBEXIACEiE. 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 hi Ixvn tempted t«> 
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 1809 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 Laboulbcnia. 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- 
Ige 
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- 
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 th, i 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- 
> This Memoir is numbered IX in the series of "Harvard Botanical > moirs. 
2 Mem. Am. Ar ad. Arts and Sci., Vol. XII, No. 3, p. 195-429. Plat.- 1-26. 
219 
