10 PROCEEDINGS OF THE AMERICAN ACADEMY. 



stalk, 90-110 x 13-22/x. Longest appendage 80 p. Receptacle 60-70 p. 

 Total length to tip of perithecium 150-185 p. 



On all parts of Forficula taeniata Dohrn. ; Mus. Comp. Zool., No. 

 1355 ; Guatemala. 



Monoicomyces Oxypodae nov. sp. 



Recejitacle very small, the two cells subequal, the basal cell involved 

 by the blackening of the foot and hardly distinguishable ; the terminal 

 appendage straight and tapering, its basal cell hyaline, nearly isodia- 

 rnetric ; the subbasal cell brown, slightly inflated and twice as long ; the 

 two cells above inflated, brown, distinguished by constrictions at the dark 

 septa. Receptacle giving rise to a branch on either side ; one usually 

 sterile, short, blunt, extending externally above the subbasal cell of the 

 primary appendage, and wholly blackened to its base : the other fertile ; 

 consisting of a single cell which is brown, broadly blackened externally, 

 the blackening involving its narrow base almost completely ; its distal 

 half becoming more than twice as broad, and giving rise to a single 

 antheridium terminally and a stalked perithecium subterminally on its 

 inner side ; stalk of the antheridium brown, two-celled (?), equal in 

 diameter to the branch cell which bears it, and like it externally black- 

 ened ; the basal cells small and forming with the wall and antheridial 

 cells a compact antheridium twice as long as broad, distally rounded and 

 slightly sulcate ; one only of the terminal cells growing out to form a 

 rather short colorless appendage. Stalk-cell of the perithecium arising 

 immediately below that of the antheridium on the inner side, its narrow 

 base black and opaque, resembling a " foot," distally hyaline, broader, 

 about as long as the antheridium ; the basal cells hyaline, rather small ; 

 the perithecium faintly purplish, rather long and narrow, relatively large, 

 the tip rather abruptly distinguished and usually slightly bent. Spores 

 45x4.5^. Perithecia 75-90 X 18-20 p. Antheridia 25-35 X 107 ft, 

 the appendage 40—50 ^t. Receptacle 10 p, its appendage 75 p. Total 

 length about 150— 165 p. 



On the inferior tip of the abdomen of Oxypoda sp ; Intervale, N. H., 

 July 17, 1901. A species most nearly related to D. fur c Hiatus and like 

 that species placed only provisionally in the present genus. 



Monoicomyces nigrescens nov. sp. 



Receptacle minute, its basal cell hardly distinguishable above the foot, 

 bearing distally a simple appendage the basal call of which is hyaline, 

 the subbasal somewhat longer than those above and deeply tinged with 



