422 PROCEEDINGS OF THE AMERICAN ACADEMY. 



purplish brown, tapering almost continuously from die broad base; the 

 tip moderately well distinguished, the posterior lips prolonged to form 

 long nearly straight and horizontal slightly inflated appendages which 

 project from the tip on either side ; the anterior lips forming the truncate 

 apex, which consists of two distinct lateral projections with an interven- 

 ing convex portion having a median apiculus. Perithecia about 85-30 

 fjL, the appendages from tip to tip 35-39 yu. Antheridia 50 X 11 ^. 

 Receptacle 300-340 X 200-230 ^. Total length to tip of perithecium 

 375-400 n. 



On an undetermined staphylinid collected by A. R. Wallace at 

 Sarawak, Borneo, Hope Coll. No. 218. 



Dichomyces biformis nov. sp. 



Basal cell hyaline or nearly so, usually somewhat enlarged and often 

 with a heel-like anterior projection; lower tier rather narrow, quite 

 opaque, the marginal cells extending up to the subterminal marginal cell 

 of the middle tier or to the cell next below it : the middle tier short and 

 stout, the nine to eleven cells hyaline or faintly reddish brown above, 

 usually becoming more or less suffused below and externally with brown ; 

 the median cells, where suffused, marked by darker transverse flecks on 

 their anterior face, the marginal cells ending in a blunt distal often 

 hyaline prominence on either side; antheridia short and stout subconical, 

 subtended by a single brown inconspicuous appendage : the distal tier 

 assuming in well developed individuals the form of a rather slender 

 crescent, the number of cells very variable, the maximum about fifty, 

 sometimes less than half this number, in which case the form is stouter, 

 the marginal cells rarely extending above the tips of the perithecia which 

 are four to eight in number and of two kinds which are not known to be 

 associated on the same individual ; in the one case they are stouter, 

 purplish brown, the basal third or more often abruptly hyaline or nearly 

 so, the much darker red brown tip tapering rather abruptly to the apex, 

 which is hyaline nearly truncate, with a well defined median blunt pro- 

 jection ; the 2)Osterior lip-cells prolonged much as in D. insignis to form 

 a long horizontal nearly cylindrical or slightly tapering bluntly tipped 

 hyaline appendage on either side ; the second type more often longer and 

 more slender than the first, pale reddish brown, the tip tapering, slightly 

 truncate or blunt, often with a blunt median projection as in the first ij\iQ, 

 but without appendages. Perithecia 105-110 X 20-35 /x,. Receptacle 

 200 X 100-300 X 270 ^. 



On Philonthus sp., Niagara Falls, New York, Mr. Charles BuUard : on 



