CONTRIBUTIONS FROM THE CRYPTOGAM IC LABORATORIES 

 OF HARVARD UNIVERSITY. No. LXXIII. 



LABOULBENIALES PARASITIC ON CHRYSOMELIDAE. 



By Roland Thaxter. 

 Presented May 13, 1914. Received April 1, 1914. 



During the past eight years I have obtained from various sources 

 a considerable number of Laboulbeniales parasitic on beetles belonging 

 to family Chrysomelidae. The first which came under my notice 

 was found on a species of Lactica near Buenos Aires, and was included 

 in my recent paper on Argentine Laboulbeniales. 1 The forms con- 

 sidered in the present Contribution have been obtained on alcoholic 

 material, from various regions in the Tropics, which I owe to the 

 kindness of numerous correspondents ; or have been collected by my- 

 self in Trinidad; while a considerable number are derived from the 

 dry material in the collections of the Museum of Comparative Zoology 

 at Cambridge. In this connection I desire to acknowledge my great 

 indebtedness to Mr. W. M. Mann for the privilege of examining the 

 insects collected by him in Brazil during the Leland Stanford Univer- 

 sity Expedition in 1911, to the Rev. Geo Schwab, Mr. C. S. Banks, 

 the late Prof. Kellerman, and others, who have been so kind as to have 

 collecting done for me: as well as to Mr. F. C. Bowditch for numerous 

 determinations, and to Mr. Samuel Henshaw for freedom to examine 

 the Museum collections and for other favors. 



In June, 1912, a paper was published by Spegazzini on Argentine 

 Laboulbeniales, in which several new species parasitic on this group 

 of beetles are included. Of these one, a species very common on 

 members of the genus Lema, is referred by him to Sphalcromyces: 

 but since its structure corresponds irt all respects to that of a typical 

 Laboulbenia, it should undoubtedly be removed to this genus. The 

 three remaining forms considered by this author, are placed by him 

 in a new genus, Laboulbenidla, which is said to be distinguished from 

 Laboulbenia by the fact that cells III and IV of the last mentioned 

 genus are here replaced by a single cell, and that cell VI, the 'stalk- 



1 These Proceedings, 48 (1912). 



