746 THAXTER. 



the primary stalk-cell of the perithecium; the antheridia mostly 

 external; the axis of the appendage consisting of usually eight, some- 

 times of seven cells, the basal sterile, brownish yellow; the rest hyaline, 

 the upper separated by slightly oblique septa, all bearing two super- 

 posed antheridia, those borne by the distal cell surmounted by an 

 additional pair which terminate the appendage: antheridia straight, 

 pointed, obliquely superposed. Stalk-cell of the perithecium hyaline, 

 relati^'ely large, more than twice as long as broad, slightly if at all 

 broader at the base, the secondary stalk-cell yellowish brown, over- 

 lapping it about one half, hardly surpassing it distally, subtriangular, 

 externally prominent; the basal cells relatively small, subtriangular, 

 concolorous with the venter. Venter brownish yellow, straight, 

 nearly symmetrical, broadly elliptical, the wall-cell making a quarter 

 to a half turn, the spreading base of the short stout neck not abruptly 

 distinguished; the tip subtended by a nearly symmetrical depression 

 of the outline on both sides, abruptly and almost symmetrically 

 inflated; the apex thus clearly distinguished, the lip-cells symmetri- 

 cally paired, the inner pair turned outward, if the twist is one half, 

 and surmounted by the outer, which form a blunt terminal free pro- 

 jection bej'ond them, half as long as the whole apex. Spores 42 X 

 3.2 At. Perithecia UO-iQO X 42 /x, the largest 180 X 50 m; the termi- 

 nal projection 10-15 fx. Appendage 70-85 fx. Receptacle 86-105 //. 

 Length from foot to insertion 100-155 ^i by 42-50 /j. at insertion. 

 Total length, average, 280 /x; longest 350 fx. 



On Dacits sp. No. 2128, Sarawak, Borneo. 



This species does not seem nearly related to any described form and 

 is quite unlike the others which are known to occur on Trypetidae. 

 It is very clearly distinguished by the characters above enumerated, 

 and the abundant material examined shows little variation except in 

 size. 



Stigmatomyces hexandrus nov. sp. 



Similar to S. separatus in general appearance, larger. Receptacle 

 hyaline, straight or slightly bent, the basal cell sometimes not more 

 than half as long as the subbasal, and usually somewhat prominent 

 below it on the posterior side. The subbasal cell tapering slightly 

 and evenly from apex to base, the former slightly prominent, espe- 

 cially on the anterior side. Stalk-cell of the appendage hardly over- 

 lapping the subbasal cell, rather narrow, more than twice as long as 

 broad, its margin straight or slightly concave, but slightly prominent 



