XEW DIMORPHOMYCETEAE. 243 



thecium, the apex of which they seldom reach, rather stout, hardly 

 tapering, six or seven celled; the primary appendage similar to that 

 of the male, usually five celled; the subbasal abruptly narrower and 

 slightly brownish; the distal as long as the rest of the appendage, or 

 nearly- so. Perithecium usually single, erect, straight or nearly so, 

 stout, sessile, the tip tapering to the apex which is slightly bent side- 

 wise toward a terminal pair of minute auricle-like projections. Peri- 

 thecia 38-50 X 12-14 /x. Receptacle 30-38 /x- Primary appendage 

 28-38 m; secondary 45-60 ju. Total length to tip of perithecium 75- 

 100 M. 



. On the elytra of a smaller species of Hcicrophylhis with an orange 

 spot on the elytra. No. 2759 Hayti (Mann). 



This species is so closely allied to the preceding that I have hesitated 

 to separate them. Since both male and female show distinct differ- 

 ences, however, I have concluded to do so provisionally, at least. The 

 perithecium of the present form not only bears the two terminal 

 projections lacking in D. HetcrophyUi, but is differently shaped, 

 erect and almost symmetrical; Avhile in the latter the apex, which is 

 turned slightly upward, has no such appendages, the inner margin 

 of the perithecium being strongly convex, while the outer is straight 

 or concave. In the male the primary appendage is not bent conspicu- 

 ously inward, as in Heterophylli, which has shorter, relatively stouter, 

 almost sessile antheridia, with shorter more strongly curved necks. 



Dimeromyces Derispiae nov. sp. 



Male indiindual pale yellowish. Receptacle consisting of from five 

 to seven cells, the basal larger, the rest somewhat oblique and flattened, 

 the distal less so; the primary appendage slightly bent inward, its 

 basal cell somewhat larger, its distal half subcylindrical with a blunt 

 termination. Antheridia from two to four superposed, arising from 

 the four upper cells; slightly divergent, the stalk-cell minute, the neck 

 well distinguished, short, stout, curved, slightly' outward. Receptacle 

 55-59 X 12.5 Ai. Appendage 34-42 m- Antheridia 25-29 X 9-12.5 m- 

 Total length to tip of appendage including small pointed foot, 80-92 jx. 

 Appendage 34-42. 



Female individual yellow, becoming slightly tinged with brown, 

 straight, erect. Receptacle with small pointed foot; consisting of 

 about twelve to sixteen cells, short and much flattened above the 

 basal one, not at all oblique, becoming gradually broader and some- 



