THAXTER. NEW LABOULBENIACEAE. 23 



ages. The latter very long, brown, extending beyond the tip of the 

 peritheciura. Perithecium short and stout, the venter inflated, the much 

 shorter neck-like distal portion abruptly distinguished, the apex blunt, 

 the stalk-cell usually rather short and stout. Perithecia 75 X 25 ix, the 

 stalk-cell 20 X 18 fx. Sterile appendages, longest 150 ^u. Appendages of 

 antheridium 100^. Total length to tip of perithecium 150 p. 

 On Oxylelus sp. Berkeley, California. 



MONOICOMYCES Thaxter. 



The characters which may be considered to separate this genus from 

 Eumonoicomyces are as follows : — The stalk of the antheridium consists 

 of two cells placed side by side ; the body of the antheridium consists of 

 two tiers of wall-cells, from each of which an inner antheridial cell is 

 separated ; the subbasal cell of the receptacle bears normally more than 

 one heterogeneous fertile branch. 



o ■ 



Monoicomyces Echidnoglossae nov. sp. 



Subbasal cell of the receptacle somewhat smaller than the basal cell, 

 bearing a terminal appendage the basal cell of which is as long, or nearly 

 as long as the receptacle and often distally enlarged ; the axis above it 

 consisting of a curved series of several cells, externally opaque, black, 

 hyaline along the inner margin, each cell giving rise from its inner side 

 to a hyaline simple branchlet, much as in the appendage of Laboulbenia 

 cristata. Fertile branches usually two, sometimes one or three, arising 

 from the subbasal cell of the receptacle, and consisting of a single short 

 basal cell which bears directly a perithecium (in some cases more than 

 one) and an antheridium. Antheridium relatively large, the stalk-cells 

 somewhat longer and narrower than the basal cells ; the cells of each of 

 the middle tiers distally more or less prominent, the rounded, almost 

 papillate elevations thus formed from the upper tier more prominent than 

 those from the lower tier : the distal cells proliferous externally and dis- 

 tally, thus forming an outer crown of shorter appendages of very unequal 

 length, which surround the usual inner series. Perithecium becoming 

 greatly and asymmetrically inflated below, and tapering rather abruptly 

 to the slightly distinguished, rather short, bluntly pointed tip ; the stalk- 

 cell variably developed. Perithecia 100-125 X 45-55^, the stalk- 

 cells 40-80 x 15 ft. Antheridia 75-100 /j, the sterile appendages 

 50-75 li. Total length to tip of perithecium 220-250 fx. 



On the inferior surface of the thorax of Echidnoglossa Americana Fau- 

 vel. Vera Pass, Colorado. Leconte Collection. 



