50 • PROCEEDINGS OF THE AMERICAN ACADEMY. 



usually bearing two branchlets, one two-, the other one-celled, each 

 terminated by a very long slender antheridium; the inner branch 

 single as a rule, consisting of a rather elongate cell terminated by an 

 antheridium; the antheridia seated on blackened septa, below which a 

 brown suffusion extends downward. Perithecium relatively large, 

 distally somewhat broader; free except its basal and stalk-cells, 

 deeply suffused with dark brown, faintly translucent; the external 

 margin straight, or usually slightly concave; the inner convex and 

 curved inward abruptly to form the tip, which is usually twisted 

 somewhat less than one quarter; so that the outer lip, which is modi- 

 fied to form a brown, rounded projection, subtended on either side 

 by curved ear-like processes, is usually almost lateral in position ; the 

 rest of the apex almost symmetrically rounded, somewhat inflated, 

 sub-hyaline, contrasting with the basal portion of the tip which is 

 concolorous with the body of the perithecium. Perithecium 100-125 

 X 35^0 /x. Spores 40 X 4 p.. Cells III about 50 X 22-24 /*. Cell 

 III, 24-28 X 8-10 //. Total length to tip of perithecium, average 

 175 p, longest 200 fx. 



Appressed along a ridge parallel to the outer margin, usually of 

 the left elytron, of Nisotra sp., No. 2481, Kamerun, West Africa 

 (Schwab): on A r . Chapuisi Jac, Madagascar, M. C.Z., No. 2504. 



The differences which separate this species from all other forms are 

 so great that they need hardly be pointed out, the peculiar outgrowths 

 of the lip-cells being in themselves sufficient to distinguish it. The 

 Madagascar material, although inhabiting a smaller and very differ- 

 ent species of the host-genus, corresponds in all essentials with speci- 

 mens from Kamerun. 



