712 THAXTER. 



Near the base of the right wing of Ilythea sp., No. 2043, Clarkstown, 

 Jamaica, W. I. 



A species clearly distinguished from the related /. calycinus and 

 other allied forms by the divergent projection from the apex of its 

 perithecium, formed by a combination of two misplaced lip-cells. 

 Sixteen specimens have been examined which show no essential 

 variations. 



Ilytheomyces lingulatus nov. sp. 



More or less strongly curved throughout, the basal cell of the 

 receptacle very minute, only the hyaline edge, below the insertion of 

 the appendage, distinguished from the foot; subbasal cell strongly 

 convex outward. Axis of the appendage black, strongly curved out- 

 ward, its basal cell somewhat narrower than the subbasal; the latter 

 hardly larger than the somewhat obliquely separated androphorous 

 cell which bears a pair of slightly divergent, brown, relatively large, 

 stout antheridia: the rest of the axis comprising not more than two 

 cells, the lower bearing no branch on the outer side and a stout several 

 times divided faintly brownish branch on the inner side, which con- 

 stitutes the bulk of the appendage, its stout branchlets curved out- 

 ward; the terminal cell ending in a curved prolongation and bearing 

 a pale simple branchlet from its upper side. Stalk-cell of the perithe- 

 cium relatively small, hyaline, becoming brownish below, partly 

 overlapped by the considerably larger, hyaline, secondary stalk-cell, 

 which bulges outward above it, its outer margin convex, as is that of 

 the somewhat smaller outer basal cell which is tinged with brown; 

 the inner basal cell vertically elongated, narrow, hyaline; body of 

 the perithecium brown or blackish brown; the venter convex exter- 

 nally, the inner margin nearly straight; the region of the tip and apex 

 broad, slightly flaring, clearly defined below by a slight depression, 

 the margins broadly suffused with deeper color; the outer convex, 

 and ending in a slight rounded elevation, from which the distal 

 margin turns abruptly inward at right angles; the inner lip-cell 

 opaque, and prolonged to form a conspicuous, slightly divergent, 

 tongue-like appendage, somewhat recurved at its tip, which is edged 

 above and within by a perfectly hyaline prolongation of the left lip- 

 cell. Spores 35X3/X- Perithecia 35 X 14-17 m; its tongue-like 

 prolongation 16-18 X 5 m, the free portion 9-10 m- Black axis of the 

 appendage 25-30 m, its longest branches 35 X 3.5 m; antheridia 18 /x. 

 Total length to tip of perithecium 55-65 ju. 



