THAXTER. — ARGENTINE LABOULBENIALES. 157 



or less conspicuous somewhat prominent red-brown septum; the tip 

 of the appenchi.u;e hardly extendin<j; to the tip of the antheridium. 

 Total length to tip of antheridium, including foot (7 ^i), 58 /x. Ap- 

 pendage 20 fx. Receptacle, exclusive of foot, 18-20 n. Antheridium, 

 including stalk-cell, 31 X 8 /x- 



Female individual, almost hyaline, the perithecium becoming 

 faintly yellowish. Receptacle consisting of five successively smaller 

 cells superposed obliquely, except the uppermost which subtends the 

 primary appeufiage, and from which it is separated by a red-brown 

 septum, the subterminal cell also bearing a similar somewhat larger, 

 usually five-celled appendage, distinguished from its small subtending 

 cell by a red-brown septum; the subbasal cell of the receptacle bearing 

 a still larger appendage, the somewhat irregular subtending cell of 

 which projects on its inner side and is distally and externally separated 

 from the slightly divergent and inflated portion of the appendage by a 

 narrower deeply blackened isthmus, which includes a portion of the 

 subtending cell, and more than half of the basal cell of the appendage 

 proper. Perithecium usually single, a second rarely developed from 

 the terminal cell of the receptacle, arising between its two appendages; 

 long slender slightly enlarged distally, the tip not clearly distinguished, 

 tapering slightly, inflated at the apex. Perithecia 75-100X14 ix. 

 Receptacle, exclusive of foot, 25-30X20 /x. Primary appendage 

 about 40 iJL. Lowest appendage, including its subtending cell, 60-70 /x. 

 Total length to tip of perithecium, including foot, 100-150 (x. 



On the inferior surface of the abdomen, near the tip, of Anisolabis 

 annulipes Luc, Palermo, No. 1682. 



This species is very closely allied to D. Forficidae, and may prove 

 only a variety, although the abundant material does not indicate 

 that the form is variable. The male is most readily distinguished by 

 the presence of only one suffused septum in its appendage, as well as 

 by its shorter stouter form and outcurved antheridial necks. The 

 two appendages arising in the female of D. Forficidae from the terminal 

 cell of the receptacle, are replaced by only one, and the character of the 

 lower appendage, and the form of the perithecium are also different. 

 A third closely allied form is known to me from the Amazon region. 



Dimeromyces Corynitis nov. sp. 



Male individual, straw -yellow, the receptacle straight, or but slightly 

 curved, consisting of a single series of from three to eight superposed 

 cells, the basal usually larger; the rest small, broader than long, all 



