236 THAXTEK. 



the terminal primary appendage, like the secondary, undistinguished, 

 nearly uniform, rather closely septate, tapering slightly at the apex, 

 often furcate above the basal cell which may also produce an adventi- 

 tious perithecium or appendage: the successive cells of the appendages 

 usually separated l\v slight constrictions at the septa, or somewhat 

 broader at the ends. Perithecia usually elongate, sul)symmetrical, 

 the medium, blunt apex subtended l)y a slight general enlargement of 

 the tip-region; the stalk imdifferentiated, or sometimes rather 

 abruptly distinguished, slender and curved. Spores 26 X 2.5 fj., 

 female. Perithecia including stalk 85-180 X 14-22 jj.. Longest 

 appendages 100-190 X 6-9 fx. Receptacle 38-46 X 4.5-5.5 m- 



On Pcltoidcs j^ustvlatns Fairm., Kamerun, West Africa, No. 3082. 



This species appears to vary considerably according to its position 

 and luxuriance of growth. Individuals from the legs and tip of the 

 abdomen are darker, more fasciculate with short-stalked perithecia. 

 Those on the elytra and prothorax are simpler and smaller, the 

 appendages usually simple and single. A specimen growing near the 

 base of the posterior legs is much larger, with branched appendages 

 and supernumerary perithecia. In the more compact and fasciculate 

 types the structure of the receptacle is more or less completely con- 

 cealed and the appendages form a dense tuft which appears to arise 

 from a more or less common base. 



Dimeromyces Strongylii nov. sp. 



Male individual pale yellowish with a faint brownish tinge. Recep- 

 tacle compact, slightly curved, erect; consisting of from five to ten 

 flattened cells obliquely superposed; the basal cell subtriangular, 

 usually flattened like the rest, which bear either antheridia or simple 

 sterile tapering appendages of which seldom more than two, sometimes 

 none, are present; the antheridia varying in number according to the 

 number of cells, arising in a unilateral series, the successive members 

 of which diverge slightly right and left; their axes, in general, coinci- 

 dent with that of the cell which bears them. Primary and secondary 

 appendages undifferentiated, similar, tapering. Antheridia rather 

 stout, straight, the necks relatively short. Receptacle 25-42 X 16 /x. 

 Antheridia 25-30 X 9 m- Appendages 40-80 m- 



Female individual pale yellowish, faintly tinged with brown. Recep- 

 tacle, similar to that of the male, consisting of from eight to ten cells, 

 bearing secondary appendages and perithecia, seldom more than three 



