216 PROCEEDINGS OF THE AMERICAN ACADEMY. 



thecium relatively very large and long, about forty-five cells in each 

 row of wall-cells; more or less evenly curved away from the append- 

 age, deeply rich red amber-brown, except at its pale narrower base, 

 of the lower half characterized by a belly-like enlargement ; the upper 

 half of nearly the same diameter throughout; the tip subtended 

 externally by a vesicular enlargement of one of the wall-cells, its 

 hyaline apex pointed and bent inward toward the concave base of 

 the long appendage, which is usually abruptly curved at its base, 

 more or less deeply suffused or opaque below, tapering very slightly, 

 consisting of about twelve cells, the lowest of which is comparatively 

 small, and not extending above the apex of the perithecium. Peri- 

 thecium 550-700X100-1 10 m (lower half) and 65-75 /x (upper half), 

 the appendage 250-350X30 /x- 



On the inferior surface of the abdomen, near the tip on the left side 

 of Tropisicrnus sp.; Palermo, near Belgrano, No. 1949. 



The long appendage of this remarkable species is very similar to 

 that of the last, to which it seems to be most nearly allied, but from 

 which it is easily separated by the form of its receptacle and its enor- 

 mous pot-bellied perithecium. 



Ceratomyces marginalis nov. sp. 



Uniform dirty translucent amber-brown. Receptacle small, the 

 foot and basal cell opaque and indistinguishable; the two cells above 

 greatly flattened, the subbasal partly involved below by the suffusion 

 of the cells above. The appendage small, short, consisting of four or 

 five superposed cells, terminated by a few branchlets, erect, appressed 

 against the perithecium or but slightly divergent. Perithecium rel- 

 atively large, about eight wall-cells in each row, straight, but slightly 

 and rather evenly inflated; the tip not distinguished, but terminated 

 by an erect hyaline nearly cylindrical slender blunt apical prolonga- 

 tion, subtended by a relatively very large sigmoid appendage, which 

 curves toward and beyond it, thence bending and tapering upward, 

 and composed of a series of eight or nine superposed cells of about 

 equal length, sometimes terminated by a few short colorless branch- 

 lets. Perithecium 90-110X35-45 fx, the longest appendage 100 /x. 

 The receptacle, including foot, 55-60X30 /x. Appendage 60X7 /x. 

 Total length to tip of perithecium 135-150 ju, to tip of appendage 

 225 )u. 



Beneath the margin of the elytra of a small pale hydrophylid. 

 Palermo, near Belgrano, No. 1952. 



