NEW LABOULBENIALES. 713 



Near the base of the right wing of Ilythea sp., on the upper side. 

 No. 2064 (Type), St. George, Grenada; No. 1723, Mandeville, Jamaica, 

 and Port of Spain, Trinidad, B. W. I. No. 2514, Bocas del Toro, 

 Panama, (Rorer). 



Ilytheomyces major nov. sp. 



Relatively long and slender; general habit straight, with local 

 curvature of the receptacle and in the region of the perithecial stalk- 

 cell. Basal cell of the receptacle combined with the foot, but its 

 hyaline distal wall and lumen clearly visible below the insertion of the 

 appendage; the subbasal cell considerably enlarged, curved, its outer 

 margin strongly convex, bulging below. Axis of the appendage 

 diverging at an angle of from 45° to 50°; black, the outer margin even 

 below, the inner margins of the basal and subbasal cells hyaline and 

 separated by a deep indentation ; the androphorous cell hyaline, much 

 smaller than the subbasal cell; which bulges somewhat below it, its 

 base almost horizontal, bearing a pair of slightly divergent, stout, 

 brown antheridia; the rest of the axis comprising perhaps two or 

 three more or less indistinguishable cells, from which stout faintly 

 brownish branches are developed above and below; the base of the 

 lowest outer branch deeply blackened and somewhat recurved; the 

 upper (inner) branches stout, curved outward and downward. Stalk- 

 cell of the perithecium hyaline, becoming brown below, deeper ex- 

 ternally, usually bent sidewise at its contact with the hyaline cells 

 above; the secondary stalk-cell longer than broad, extending down to 

 form a rounded protrusion beside the stalk-cell and forming, together 

 with the long inner basal cell, a relatively narrow region above the 

 stalk-cell, which is abruptly broadened by the hump-like protrusion 

 of the outer margin of the hyaline outer basal cell: the straight erect, 

 brown venter, long narrow and slightly, almost symmetrically, in- 

 flated, tapering slightly distally; the brown tip- and apex-region, 

 which is hardly distinguished, straight, stout and of nearly even 

 diameter below, but distally passing to a thick tongue-like incurved 

 termination, its convex margin deeply colored, and ending in a very 

 slight rounded hemispherical elevation; while its upper convex, thick, 

 perfectly hyaline margin is continuous with the outer margin of the 

 perithecium, the transition from the suffused to the hyaline area 

 marked by a hardly perceptible depression. Spores 45 X 3 /x. Peri- 

 thecia 58-68 X 18 )u; the tongue-like termination 10 X 8 ju; the basal 

 cell region 25 X 10 /x below, X 14 ju above. Appendage; axis about 



