24 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Monoicomyces furcillatus nov. sp. 



Receptacle consisting of two small cells which are hardly distinguish- 

 able owing to a general blackish brown suffusion ; producing on either 

 side a stout blackened prolongation, the two forming a nearly symmetri- 

 cal fork-like structure, the prongs of which are slightly curved inward, 

 and slightly divergent. From near the base of these outgrowths and 

 between them arise, apparently from single basal cells on both sides, 

 single stalked perithecia and antheridia. The antheridia rather long 

 and slender, their detailed structure not determinable in the types. The 

 perithecia long and slender, straight, symmetrical, pale yellowish, slightly 

 inflated toward the base, tapering gradually to the blunt apex. Spores 

 about 40 X 3 ^. Perithecia 135 X 27^. Outgrowths from the recep- 

 tacle 110 X 12 fi. 



Near the tip of the abdomen of Aleochara repetita Sharp. Panama. 

 Sharp Collection, No. 1095. Of the three individuals obtained one only 

 is in fair condition, and none have antheridia in which the details of 

 structure can be made out. Owing to the suffusion and great reduction 

 of the receptacle it is further impossible to determine the exact origin of 

 the remarkable fork-like outgrowths, or the other structures which arise 

 from it. The form is a most peculiar one and recognizable without diffi- 

 culty ; yet, until further data are obtained concerning it, its generic 

 position cannot be certainly determined, although it seems at least more 

 closely allied to Monoicomyces, in which it is provisionally placed, than 

 to any other known type. 



Monoicomyces Aleocharae nov. sp. 

 Pale amber, shading to amber brown. Receptacle, together with the 

 foot and the basal cell of the terminal appendage, forming a heart-shaped 

 body, blackened below, bearing terminally a median, rigid, slender, almost 

 wholly opaque, black branch, abruptly distinguished from its broad basal 

 cell : the subbasal cell of the receptacle small, triangular when viewed 

 side wise, giving rise to two fertile branches, the short small basal cells 

 of which give rise at once each to two secondary branches and an anther- 

 idium ; the branchlets proliferous and forming an axis of usually three 

 cells, the lower bearing an antheridium, and each of the two upper an 

 antheridium and a perithecium ; there being thus sixteen antheridia and 

 eight perithecia, in fully and symmetrically developed specimens, which 

 form a dense, spreading, fan-like tuft, the antheridia being in general 

 posterior in position, overlapping one another between the black sterile 



