EXTRA-AMERICAN LABOULBENIALES. 743 



Stigmatomyces ventriosus nov. sp. 



Relatively short and stout. Receptacle hyaline, the basal cell usu- 

 ally somewhat curved below, tapering to the foot; the subbasal cell 

 much smaller, usually broader than long. Stalk-cell of the appendage 

 tinged with amber-brown, relatively narrow, more than twice as long 

 as broad, its bluntly pointed base overlapping the subbasal cell slightly, 

 if at all; its outer margin straight or slightly concave, and somewhat 

 prominent below the broad insertion. Axis of the appendage consist- 

 ing of four successively smaller cells, the fourth much smaller and 

 bearing one antheridium, followed by two which are superposed above 

 it, the upper spinose; all the others bearing two antheridia, which are 

 usually turned somewhat obliquely sidewise; the basal cell somewhat 

 longer than broad, amber-brown, the rest of the appendage slightly 

 suffused below; the antheridia appressed with hardly divergent necks. 

 Stalk-cell and secondary stalk-cell of the perithecium nearly equal, 

 broader than long, flattened-triangular, concolorous with the stalk-cell 

 of the appendage and the basal cells, which are small and subtriangu- 

 lar; the secondary stalk-cell slightly convex externally, its margin 

 often reaching to the subbasal cell of the receptacle: venter somewhat 

 darker amber-brown, short and stout, its axis diverging at a slight 

 angle to that of the appendage and receptacle; its outer margin 

 straight or becoming convex, its inner bulging very strongly; the 

 wall-cell on the left side forming a slightly elevated area ending in a 

 more or less distinct and abrupt broad ridge below the short, usually 

 abruptly curved, neck; the tip and apex as long as the subhyaline neck, 

 and turned abruptly inward by its curvature; the tip tinged with 

 brownish yellow: the apex short, not distinguished, hardly tapering; 

 the lips prominent, rather coarse, two of them lower and paired, the 

 other two forming a blunt point which projects beyond them; the 

 pore usually directed inward, but sometimes sidewise, owing to a slight 

 twist of the wall-cells. Spores 30 X 3 m- Perithecia 75-85 fx. The 

 venter 42-48 X 30-36 m- Appendage 45-50 X 10 m- Receptacle 

 42 X 18 fx. Total length to tip of perithecium 120-140 n. 



On the inferior abdomen of a small fly resembling Discocerina. 

 No. 2743a, Kamerun, ^Yest Africa. 



This small species appears to be more nearly related to S. Disco- 

 cerinae, but is very readily recognized by its "pot-bellied" venter 

 and short incurved neck. The thirty individuals examined show no 

 important variation. 



