EXTRA-AMERICAN LABOULBENIALES. 707 



and externally slightly prominent below the well defined oli^•aceous 

 insertion-cell; outer appendage strongly divergent, slightly curA'ed 

 outward, consisting of three cells; the basal somewhat narrower; 

 the middle somewhat longer, deeply tinged with olivaceous l)rown, or 

 slightly reddish; the terminal cell bearing from its broader distal 

 surface a series of branches curved outward in a fan-like tuft, and 

 once or even twice branched; the lower, outer, branches suffused at 

 the base, the rest quite hyaline; all tending to produce unilateral 

 series of from two to five short branchlets, which may be more or less 

 regular and comb-like, or more confused and occasionally dcAcloped 

 on both sides; inner appendage consisting of a small hyaline basal 

 cell which may bear two or three short branches, each consisting of a 

 single hyaline cell terminated by a pair of relatively large long brown 

 antheridia. Perithecium slightly inflated above the base, which 

 extends below the insertion-cell, tapering to the rather coarse-lipped 

 apex, the inner lips more prominent and rounded ; the upper and lower 

 limits of the two lower and more deeply suffused wall-cells clearly 

 indicated. Spores 35-40 X 3 n. Perithecia 70-75 X 18-24 /x. Ap- 

 pendage to tips of branches 50-64 /jl ; the three basal cells 35 fx. Total 

 length to tip of perithecium 100-150 /x. 



On the thorax and wing of a sapromyzid fly, Physogenia ? Nos. 2662 

 (Type) and 2748. Kamerun, West Africa. 



This species is chiefly remarkable for the spreading tuft of peculiar 

 branches which terminate the deeply suffused, three celled axis of the 

 outer appendage; many of the branchlets bearing on the lower side a 

 more or less well marked series of closely set, blunt outgrowths which 

 give them a comb-like appearance. One or more of these outgrowths 

 may arise also from the upper side, or they may be less regularly de- 

 veloped. The specimens on the thorax of the host are for the most 

 part more slender, with normally developed foot, and somewhat 

 stouter and more uniform basal and subbasal cells, which are dis- 

 tinguished by a slight enlargement, rather than an indentation, at the 

 septum. A few individuals growing at the base of the wing are also 

 somewhat peculiar in that the axis of the appendage is distinctly 

 reddish, and the apex of the perithecium is turned so that it is viewed 

 at right angles to the normal position, the anterior lips projecting 

 conspicuously and almost symmetrically on either side of the posterior, 

 which lie between and project ajjove them. The species is most 

 nearly allied to L. davuUfcra, but belongs to the Ceraiomyces-type, 

 while the last mentioned species has the structure of a typical Lahoul- 

 henia. 



