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MONOGKAPH OF TIIE LABOULBENIACEiE. 



GENERAL SYNOPSIS OF THE GENERA AND SPECIES WITH THEIR 



HOSTS. 



Family LABOULBENIACE^E. 



GROUP I. Endogenre. Antherozoids produced endogenously. 

 Order I. Peyritschielle^. Antheridial cells united to form a compound antheridium. 



A. Dioecious. 



Genus I. Dimorphomyces. Peritliecia and appendages borne in pairs to the right and left 

 of the median line. 



(1) D. denticulatus Thaxter, on Falagria dissecta Er., N. America. 



(2) D. muticus Thaxter, on Falagria dissecta Er., N. America. 



Genus II. Dimeromyces. Peritliecia and appendages in a unilateral series. 

 (1) D. africanus Thaxter, on Pachyteles luteus Hope, Africa. 



B. Monoecious. 



* Antheridium borne on an appendage free from the receptacle. 

 Genus III. Cantharomyces. Antheridium lateral below a terminal branch of the append- 

 age. Perithecia free. 



(1) C. Bledii Thaxter, on Bledius assimilis, N. America. 



(2) C. occidentalis Thaxter, on Bledius armatus Er., N. America. 



(3) C. pusillus Thaxter, on Trogophlxus sp., N. America. 



Genus IV. Haplomyces. Antheridium terminal tipped by a spine-like process. Perithecia 

 free. 



(1) H. californicus Thaxter, on Bledius ornatus Lee, N. America. 



(2) H. texanus Thaxter, on Bledius rubiginosus Er., N. America. 



(3) H. virginianus Thaxter, on Bledius emarginatus Say, N. America. 



Genus V. Eucantharomyces. Antheridia terminal with a neck-like terminal canal, the 

 antheridial cells in five (?) vertical series. Perithecia free. 



(1) E. Atrani Thaxter, on Atranus pubescens Dej., N. America. 

 Genus VI. Camptomyces. Antheridium terminal with a prominent apical pore. Anthe- 

 ridial cells in two (?) vertical series. Perithecia free. 



(1) C. melanopus Thaxter, on Suriius prolixus Er., S. longiusculus Mann., N. America. 

 ** Antheridium sessile on the body of the receptacle, sharply pointed. 

 Genus VII. Enarthromyces. Receptacle a single series of superposed cells with one or 

 more lateral antheridia. Perithecia free. 



(1) E. indicus Thaxter, on Pheropsophus sp.', Asia. 



