XEW DIMORPHOMYCETEAE. 



275 



Basal cell of the primary appendage free, diverging from the distal 

 end of the small short fourth cell of the receptacle; which is slightly 

 bent outward distally, and bears from one to three radially disposed 

 branchlets distinguished by dark septa; the branchlets hyaline, simple, 

 slightly tapering, the two appendages often diverging almost symmetri- 

 cally on either side of the perithecium which rises between them from 

 the tlaird cell of the receptacle; and is short stalked, or nearly sessile, 

 straight, somewhat asymmetrical, very slightly inflated; the apex 

 bent inward and distinguished, especially on the inner side, by a 

 variably well marked indentation; the inner lip slightly more promi- 

 nent. Spores about 30 X 4 m- Perithecium 65-80 X 8-9 m- Recep- 

 tacle 30-34 X 18 M- Secondary appendage 80-125 ju- Total length 

 to tip of perithecium 85-105 /x. 



On the inferior abdomen and forceps of Prorevs sivniJaus Stal. 

 from cane sheaths. No. 3134, Los Banos, Laguna, P. I., \V. H. 

 AYeston. 



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

 most readily distinguished by the nearly horizontal septum which 

 separates the basal and subbasal cell, the latter being subtriangular 

 with its distal angle nearl\- median, while the receptacle of D. Forficulae 

 consists of four successively narrower cells, their septa very oblique 

 and nearly parallel. There is but one secondary appendage, the lower, 

 developed in the present species, the character of which as well as of 

 the perithecium is somewhat different. 



Dimeromyces Australasiae nov. sp. 



Male individual colorless, straight, erect, rather slender; the axis 

 consisting of three cells; the basal much longer, terminated by the 

 basal cell of the appendage, which may bear one or two short, two- 

 celled branches distally, each separated by a dark basal septum. 

 Stalk-cell of the antheridium small, the regions rather clearly dis- 

 tinguished by indentations on the inner margin: neck subgeniculate 

 bent or curved more or less strongly outward. Axis, including basal 

 cell of appendage, 38-44 X 9 m- ' Antheridia 24-28 X 7 m- Total 

 length to tips of appendages, including foot, 60-75 /x. 



Female individual very faintly tinged with purplish brown. Recep- 

 tacle consisting of four obliquely superposed cells; the basal as long 

 as the rest combined, more or less strongly curved above the foot, 

 and bulging on the posterior side: the subbasal cell bearing the first 



