184 PROCEEDINGS OF THE AMERICAN ACADEMY. 



theridial cells single or two to four of these superposed; the third 

 cell bearing distally one to usually not more than three branches; 

 the outer, primary branch, shorter, slender, hyaline; the others, if 

 present, hyaline, stouter, longer, sometimes once furcate above the 

 basal cell. Perithecium 100-156X20-35 fj., including basal cell-region; 

 stalk-cell 175X20 ^c. Greatest length of appendage 150-430 /x. Total 

 length to tip of perithecium 180-385 n. 



On Lathrobiuni niti ^um Er., Palermo, Temperley and Llavallol, 

 Nos. 1687, 1688, 1998; 



The type of this species occurs on various parts of the host and when 

 its appendage is well developed is a very striking form. It is very 

 variable in size and in the development of its appendage, and near the 

 tips of the legs assumes a small, compact stout habit quite unlike 

 the usual form. The variety corresponds exactly to the type formerly 

 distinguished as Rhadinomyces, and occurs on the elytra, usually, 

 or at the base of the legs. It differs from the type in its slender form, 

 the absence of sterile branchlets on the antheridial branches, and of 

 the black bristle-like branches of the rest of the appendage. The 

 examination of a sufficient series, however, appears to show that the 

 two are not specifically separable. 



Corethromyces Scopaei nov. sp. 



Perithecium hyaline becoming faintly tinged with yellowish, rela- 

 tively rather large, usually slightly asymmetrical owing to an out- 

 ward curvature, tapering but slightly above the basal portion which is 

 not prominently inflated; the tip short, conical, subsymmetrical ; the 

 small rounded papillate apex prominent; the basal cells forming a short 

 compact group not distinguished from the base of the perithecium, 

 the stalk-cell broad hyaline narrower below, set obliquely or sidewise 

 on the small nearly isodiametric hyaline subbasal cell of the recepta- 

 cle; the basal cell of which is about the same size but of characteristic 

 form, rounded outward, its thick outer wall passing into and not dis- 

 tinguished from the broad undifferentiated hyaline or slightly purplish 

 foot. Appendage wholly hyaline, the basal cell hardly longer than 

 broad, the outer wall greatly thickened and in contact below with 

 the basal cell of the receptacle; the subbasal cell somewhat narrower, 

 the outer wall greatly thickened; the distal portion of the appendage 

 occupied by a more or less crest-like series of hyaline branches 

 derived from the end of the subbasal cell and from one or perhaps 

 more terminal cells which become displaced and appear to be external, 



