684 THAXTER. 



all the rest produce two; the series directed somewhat sidewise and 

 outward, the necks small, somewhat appressed in two rows, but 

 slightly curved. Stalk-cell of the perithecium broad, flattened, sub- 

 triangular, paler and usually larger than the cells above it; which are 

 subequal, somewhat rounded, the external basal cell somewhat promi- 

 nent externally, with thickened wall. Perithecium smoky brown 

 throughout; the venter more deeply, suffused, straight, erect, hardly 

 inflated, longer than the distal portion, of more or less even diameter 

 throughout or somewhat broader distally; the neck diverging or 

 curved outward more or less distinctly, more or less abruptly dis- 

 tinguished, its abruptly spreading base slightly asymmetrical; the 

 tip slightly narrower; the two outer lips slightly prominent, the inner 

 forming a small but characteristic subtriangular prominence, the distal 

 free margin of which is horizontal and nearly straight, on a level with, 

 or slightly lower than the outer lip-edges, while its outer (posterior) 

 margin curves abruptly inward to a minute hyaline papilla which 

 subtends it. Spores 35 X 3.5 ^t. Perithecia 175-192 yu; the venter 

 70-98 X 28-42 M. Appendage 56 X 16/1. Receptacle 100-110 X 

 30 fji, the smallest 56 X 28 /i. Total length to tip of perithecium 

 210-300 fx. 



On the superior surface of the thorax of Ilythca sp. No. 1907 (Type) 

 Williamsfield, and No. 2043f, Clarkstown, Jamaica, W. I. 



Variations from the type-form above described may be distinguished 

 as follows. 



Var. a. From Clarkstown, Jamaica, No. 2043e, on the upper, 

 surface of the abdomen and thorax, measuring 280-350 /jl in length, 

 the perithecium straight or slightly curved, the distal portion much 

 longer, even twice as long as the venter, and long-conical, the tip 

 slightly distinguished on both sides, the lips forming a more prominent 

 median short termination, symmetrically subtended on either side 

 by shorter projections. 



Var. b. No. 2043d, from the same locality, is similar except that 

 the distal portion of the perithecium is relatively somewhat shorter 

 and describes a sigmoid curve. 



Var. c. No. 2064, from St. George, Grenada (Brues and Allen), 

 growing on the upper surface of the thorax, has a receptacle about as 

 broad as the venter of the perithecium ; which is slightly and symmetri- 

 cally inflated and broader distally, where it is abruptly distinguished 

 from the very long and more slender distal portion, which terminates 

 in a fashion similar to that of varieties a and b. 



Var. d. No. 2043d on the anterior legs of an Ilythea from Clarks- 



