THAXTER. — NEW LABOULBENIACE^E. 445 



thecium at first pale yellowish, the inflated portion becoming rich amber 

 brown, the distal portion much paler except in the region of the more 

 deeply suffused subtermiual elevation on the inner side. The narrowed 

 base nearly hyaline, not differentiated from the receptacle. Receptacle 

 consisting of three superposed cells, short, narrow below, abruptly very 

 broad above; the foot relatively small, the basal cell small, at first 

 hyaline, later becoming tinged with smoky brown ; the two distal cells 

 relatively very small and broadly blackened except along the nearly hyaline 

 anterior margin, the opaque area extending obliquely so as to involve the 

 geniculate base of the appendage. Appendage relatively very large and 

 stout, tapering in very young individuals to a slender apex and consist- 

 ing of from fifteen to twenty superposed cells, many of which may be 

 once longitudinally divided, a subtriangular appendiculate cell being 

 separated from the inner side, or also from the outer distally ; the 

 branches numerous with very long and slender branchlets which may be 

 several times branched. Spores 95 X 4 /j. Perithecia 475-550 X 90- 

 110 (inflated portion) X 70 (i (distal portion). Receptacle including 

 foot 85 p. Total length to tip of perithecium (longest) Go5 p. Appen- 

 dage 275-475 X 45 p, its longest branches 550 X 3 (i. 



On Tropisternus nimbatus Say. Eustis, Florida. On the inferior sur- 

 face of the thorax on the left side. 



Ceratomyces denticulatus now sp. 



Similar to C. rostratus. Amber brown, the ascigerous portion of the 

 perithecium slightly inflated and rather abruptly distinguished from the 

 elongate neck, which at maturity is straight or slightly sinuous ; the cell 

 rows containing about fifty-five cells, the neck more slender toward the 

 base, distally somewhat broader; successive cells in two adjaceut rows in 

 this broader portion projecting to form well marked rather slender tooth- 

 like blunt outgrowths, directed obliquely upward and separated by a 

 basal septum, one series usually consisting of five cells, sometimes six, 

 the cells immediately below often bulging prominently or forming 

 shorter tooth-like outgrowths ; the second series consisting of usually not 

 more than three well defined similar tooth-like outgrowths : above these 

 two series the upper fifth (about) of the neck is bent abruptly backward, 

 lying nearly parallel to the portion below it; the tip broad snout-like, 

 the lip-cells forming a small papillate prominence above and external to 

 a broad rather distinctly differentiated cell, which terminates one of the 

 inner rows, and is almost as large as the lip-cells taken together. Re- 



