EXTRA-AMERICAN LABOULBENIALES. 717 



where it is obliquely separated from the subvesicular hyaline tip. 

 Stalk-cell of the perithecium opaque like the subbasal cell below it, 

 short, distally broader; secondary stalk-cell hyaline above and within, 

 its basal half or third distinguished by an obliquely separated, sub- 

 triangular opaque area; basal cells quite hyaline, or the strongly 

 convex wall of the smaller outer one slightly brownish; the inner very 

 large and bulging toward the appendage, that on the left even intruded 

 between the adjacent antheridia and branchlets of the appendage, 

 that on the right less prominent. Perithecium slightly curved out- 

 ward, the lower part of the ascigerous cavity surrounded by the basal 

 cells, the outer lower wall-cell prominent, with more or less distinct 

 lumen; the outer smaller half of the region of the two first tiers hyaline 

 and obliquely separated, owing to a slight twist, from the larger inner 

 half, which is increasingly suffused with slightly reddish brown from 

 below up; the tip somewhat broader than long, distinguished by its 

 uniformly somewhat darker color, especially its outer margin, which 

 forms the base of the well de^•eloped trigger-organ, developed from 

 the outer lip-cell, which is stout, its base erect, geniculate opposite 

 the lips, thence erect, but soon curved rather abruptly outward and 

 somewhat stouter, wholly brown, deeper below; the hyaline tip taper- 

 ing slightly: the apex longer and paler than the tip, blunt with per- 

 fectly hyaline rather prominent vesicular lips. Spores about 22 X 

 2.5^1. Perithecia to base of ascigerous cavity 50-75 X 14-20 /i ; 

 trigger-appendage 50-75 X 6 m; basal and stalk-cell region 20-35 X 

 18-22 fjL. Receptacle 10 X 12 /jl. Appendage 50-60 //. Total length 

 to tip of perithecium 100-120 n. 



On the inferior surface of the abdomen of Uythea sp. No. 2132, 

 Sarawak, Borneo. 



This species is very closely allied to /. elegans of which it may prove 

 to be only a variety. The subbasal cell is wholly opaque from the 

 first, and uniform with the stalk-cell, which does not show the same 

 abrupt differentiation; the stalk and basal cell region is greatly 

 developed and very broad, the perithecium is shorter and broader. 

 A large branch arises from the axis of the appendage on the upper side 

 just beside the large straight antheridium, which is usually almost as 

 highly developed as the axis itself; the external branches being longer 

 and less deeply blackened. The branchlets as a whole are very copi- 

 ous and not closely appressed. A dozen or more specimens have been 

 examined which show no essential variations. 



