22 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Dimeromyces Longitarsi nov. sp. 



Male individual: hyaline or faintly yellowish; receptacle consisting 

 of three obliquely superposed cells, the two upper bearing antheridia, 

 and subequal, the basal as long as these two combined; the distal 

 bearing terminally the unicellular appendage, which is twice as 

 broad as the base of a hyaline usually straight subulate process that 

 terminates it and nearly equals it in length. Antheridia normally 

 two, the stalk-cell broader than long; the rather stout venter some- 

 what longer than broad, abruptly distinguished from the rather 

 stout neck which is of about the same length and distally bent 

 abruptly outward. Total length to tip of spinous process 60-64 /jl; 

 to tip of distal antheridium 70 n, the foot included. Appendage, 

 including spinous process, 14-15 fi. Basal cell of receptacle 18 /jl. 

 Antheridia 22 X 2 /*. 



Female individual: tinged with yellowish, the perithecium deeper, 

 faintly tinged with amber-brown, bent inward basally and distally, 

 rather long and narrow, slightly broader distally below the paler tip, 

 which is rather clearly distinguished above a slight constriction most 

 prominent on the inner side; the apex distinguished by an often deep 

 constriction, its base inflated to form rounded prominences above 

 which it is compressed, asymmetrical, tapering to a blunt point: the 

 stalk-cell small subtriangular, free only externally. Receptacle 

 consisting of three obliquely superposed cells, the two upper subequal, 

 angular, the basal longer; primary appendage as in the male, a minute 

 cell distinguishable at the base of the spinous process: secondary 

 appendage single, its basal cell similar to the subbasal cell of the 

 receptacle from which it arises and with which it is obliquely associated ; 

 the rest of the appendage simple, slender, whip-like, tapering; seldom 

 extending beyond the tip of the perithecium. Perithecium 80- 

 120 X 20-25 ix. Secondary appendage 85-100 yu: primary appendage, 

 including spine, 25 [x. 



On the elytra of Longitarsus testaceus Mels., Fayetteville, Arkansas 

 No. 1801; of L. subcinctus Har., No. 2455 and of Apkthona Deyrollei 

 Baly, No. 2454, Port of Spain, Trinidad, B. W. I. 



This species is most nearly related to D. Homophoctae from which it 

 is distinguished by its unicellular primary appendage and single 

 secondary appendage, as well as by various other points of difference. 

 The material from Arkansas appears to differ in no respect from that 

 obtained in Trinidad. 



