NEW LABOULBENIALES. 661 



1864, a (Tvpe), b and c, Balaclava; No. 2049, Clarkstown, Jamaica, 

 W. I. 



This species is very closely allied to S. crassicollis, with which it 

 agrees in general structure. It differs in its more slender habit, very 

 elongate slender appendage, which is composed of twice as many cells, 

 and in its enormously elongated slender neck and relatively smaller 

 venter. About a dozen examples have been examined from five indi- 

 vidual hosts. 



Stigmatomyces crassicollis nov. sp. 



Pale yellowish or nearly hyaline, the venter, basal cell region and 

 the base of the appendage more or less suffused with yellow brown. 

 Receptacle tapering to a pointed base, usually straight, or very slightly 

 curved, usually very short; the cells subequal, separated by a slightly 

 oblique septum and forming, with the stalk-cells of the perithecium and 

 that of the appendage, a compact triangular cell-group with even out- 

 line; rarely somewhat more slender and irregular. Stalk-cell of the 

 appendage but slightly broader distally, its whole upper surface 

 occupied by the very broad insertion of the flat, colored basal cell, 

 the narrower outer end of which protrudes externally. Appendage 

 curved toward the venter; the axis consisting of not more than nine 

 or ten cells, the lower producing two, the upper single antheridia 

 directed inward, those above the basal cell flattened elliptical, ob- 

 liquely superposed, externally separated by well defined indentations. 

 Stalk-cell of the perithecium about as long and large as that of the 

 appendage, not reaching quite as high as the smaller secondary stalk- 

 cell which overlaps externally its upper four fifths, and is similar 

 in general to the basal cells above it. Perithecium usually straight, 

 or the distal portion slightly curved; the venter sometimes very 

 slightly narrower and indented above the basal cell region, giving 

 it a slight cup and ball effect; short, stout, symmetrical, broadly 

 ovoid, or sometimes almost spherical; its outline evenly continuous 

 with that of the spreading base of the very stout and elongate neck, 

 which tapers very slightly distally: the tip and apex very short, but 

 slightly distinguished by its more rapid tapering; the apex nearly sym- 

 metrical bearing four similar minute papillae. Spores 20-22 X 2 fj,. 

 Perithecia 140-325 ij, longest; the venter 35-60 X 38-64 fx; the neck 

 350 IJ. and less X about 25 /x toward base; the tip and apex 18 fx. 

 Appendage 35-70 n. Receptacle 50-70 X 22-35 m- Total length to 

 tip of perithecium, small 200 /x, largest 430 fx, average 275 fx. 



