NEW DIMORPHOMYCETEAE. 241 



uniform. Terminal appendage three-celled, the basal somewhat 

 broader, the distal pointed, all of about equal length. Antheridium 

 long and rather slender, erect, the stalk-cell relatively long and free, 

 the neck nearly as long as the venter, diverging or slightly curved 

 outward, its apex extending some distance above the tip of the append- 

 age. Total length to tip of antheridium 42 X 8 /x. Antheridia 24 X 

 9 )u. Appendage 14 X 3 m- 



Female individual hyaline, erect, slightly curved: the receptacle 

 consisting of four cells very obliquely superposed; the basal longer 

 and extending upward almost as far as the two succeeding ones, the 

 subbasal bearing the single secondary appendage, close to the base 

 of which the third cuts oflf a small cell; the fourth less flattened, nar- 

 rower and longer, bearing the single perithecium. Primary appendage 

 consisting of two large cells of uniform width, the upper longer; the 

 rest of the appendage abruptly narrower and faintly brownish at the 

 base, slightly tapering and rather elongate. The secondary appendage 

 elongate, consisting of a large neai'ly free basal cell, above which a 

 faintly brownish narrower basal portion is distinguished composed of 

 six to ten small flattish cells; the distal portion variably elongated and 

 tapering, the walls of the cells tending to disorganize. Perithecium 

 sessile, or very short-stalked, slightly curved, its inner margin rather 

 strongly convex; the apex somewhat sulcate, distinguished by a 

 rather abrupt constriction from the tip-region. Perithecia 60-75 X 

 14m- Longer appendages secondary, 114-130 X 4m (basal part) 

 primary appendage 75-100 X 3.5 m above basal cells, the lafter 24 X 

 6 M- Receptacle 28 X 15 m- Total length to tip of perithecium 75- 



100 M- 



On the elytra of Platydema sp.? No. 2243, Independencia, Amazon, 



(Mann Coll.). 



This species is clearly distinguished by its peculiar appendages and 

 the abruptly differentiated apex of its perithecium, the large lip-cells 

 in some individuals separate and irregularly divergent. 



Dimeromyces Heterophylli nov. sp. 



Male individual tinged with pale brownish yellow. Receptacle 

 consisting of four cells, the basal much longer, the rest somewhat flat- 

 tened and obliquely superposed. Appendage consisting of a large 

 free basal cell prominent distally and externally; the rest of the append- 

 age usually three-celled, abruptly narrower, its basal cell brownish. 



