694 THAXTER. 



On the superior surface of the abdomen of Parydra humilis Will. 

 No. 1868, Balaclava, Jamaica. 



A species most nearly allied to S. protrudens and S. -pinguis, from 

 which it is abundantly distinguished by the form of its receptacle 

 and perithecium, as well as by the tongue-like development of two of 

 the lip-cells. 



Stigmatomyces pinguis nov. sp. 



Receptacle stout, subhyaline or pale yellowish; the basal cell 

 tapering slightly l)elow its anterior margin, nearly straight; the poste- 

 rior more or less convex, distally slightly inflated and more or less 

 distinctly broader than the base of the subbasal cell, which is separated 

 from it by a more or less oblique septum, and is usually from one half 

 to one third as long, becoming broader distally. Stalk-cell of the 

 appendage rather short, darker dull amber-brown, concolorous with 

 the venter and basal cell region of the perithecium; its external margin 

 straight or somewhat concave, overlapping the subbasal cell very 

 slightly, distally protruding somewhat below the rather broad in- 

 sertion of the appendage, which is slightly higher than the base of 

 the ascigerous cavity of the perithecium. Appendage permanent, 

 uniformly suffused, straight or usually convex on the axis side, lying 

 somewhat obliquely or with the antheridia turned outward; the axis 

 consisting of three cells, the basal distinctly longer than broad, bearing 

 two slightly divergent antheridia from which it is very obliquely 

 separated; the two remaining cells flattened, the subbasal longer and 

 bearing two antheridia; while the third bears only one, which is 

 followed by tlie single terminal antheridium, the neck of which be- 

 comes abruptly curved toward the axis-side. Stalk-cell of the perithe- 

 cium occupying the whole width of the receptacle, much flattened, 

 subtriangular, paler than the deeply suffused cells above it; which are 

 concolorous with the venter of the perithecium, rather small and 

 irregularly triangular, the outer ones variably prominent. Venter of 

 the perithecium relatively large and stout, coarsely granular, broadly 

 ovoid, the inner margin distinctly more convex; about as long as the 

 distal portion which is strongly and abruptly curved inward in the 

 region of the tip, the neck not very abruptly distinguished, its wall- 

 cells separated by more or less distinct furrows, its spreading base 

 delimited by a horizontal line of separation from the venter; otherwise 

 stout and nearly uniform, or slightly broader where it joins the short 

 tip and apex, which are not otherwise distinguished; the termination 



