168 PROCEEDINGS OF THE AMERICAN ACADEMY. 



bent outward. Basal cell 7X9 m. Total length, including foot, 140- 

 165X25 /x. 



On the abdomen of Diesfota sp. Temperley, No. 2007, and Llavallol, 

 No. 1498 on Homalota sp., the genera doubtfully determined by Dr. 

 Fenyes. 



Tetrandromyces nov. gen. 



Male individual consisting of four superposed cells the uppermost 

 bearing a crown of four simple antheridia. 



Female individual. General structure as in Dioicomyces. 



Although the perithecium of the female in this genus is unlike that 

 of any of the species of Dioicomyces in external form, it corresponds 

 to this type almost exactly in other respects, so that the genus is 

 based upon the characters of the very peculiar male individual, in 

 which the antheridia are not only grouped, but of a distinctly different 

 type from those of Dioicomyces, recalling those of Synandromyces or 

 of some species of Stigmatomyces. 



Tetrandromyces Brachidae nov. sp. 



Male individual stout, faintly suffused with brownish olive, basal 

 cell nearly h^'aline, longer than broad, the three cells abo^■e it subequal 

 or successively smaller, the distal cell triangular or otherwise shaped 

 according to the point of view. Antheridial cells as large as the basal 

 cell, the stout suberect and subsymmetrically arranged brown necks 

 but slightly curved. Antheridia 23X8 /i, the group 16 /j. wide. Total 

 length including foot 60 /x. 



Female individual. Receptacle faintly yellowish, the basal cell 

 small, about as long as broad; the subbasal cell triangular; minute 

 but clearly distinguished ; the subtending cell of the appendage narrow, 

 oblique, the terminal cell stout, distally rounded, deep black-brown. 

 Perithecium relatively very large, the stalk-cell rather short and stout, 

 faintly yellowish; the basal cell and basal wall-cell regions not dis- 

 tinguished externally, and forming an evenly slightly inflated base, 

 or the external basal cell forming a rounded slightly blackened promi- 

 nence; the second tier or wall-cells marked by a slight inflation 

 distally, not distinguished from the slightly asymmetrical dome- 

 shaped region of the third tier, above which the short and abruptly 

 narrower tip is abruptly distinguished, being subtended by the slightly 

 elevated blackened insertion of the trichogyne; the hyaline apex 

 slightly asymmetrical, bluntly rounded or slightly pointed, subtended 



