THAXTER. NEW LABOULBENIACEAE. 407 



noted in the description, as well as from the fact that the venter of the 

 peritheeium is longer and less distinctly inflated, while its apex shows no 

 perceptible modification of the lip-cells. 



Stigmatomyces Papuanus nov. sp. 



Venter of the peritheeium dark amber brown, relatively small and 

 rather prominently inflated, oval to elliptical ; usually not abruptly dis- 

 tinguished distally from the hyaline or yellowish neck, which in well- 

 developed specimens is very elongate, tapering very gradually, in others 

 shorter and stouter ; the tip clearly distinguished (abruptly so in the 

 shorter forms), subconical, the posterior lip-cells forming a narrow, sub- 

 truncate, slightly recurved apical projection beyond the two laterally 

 placed, papillate, slightly divergent projections of the anterior lip-cells ; 

 the basal cells forming a short, stout stalk, separated from the stalk-cell 

 by an oblique septum. Appendage relatively small, resembling that of 

 the S. Limosinae in general form, the fertile cells not more than five 

 or six in number, the upper ones separated by constrictions which may 

 be obsolete between the lower ones. Receptacle relatively short, the cells 

 subequal, yellowish. Spores about 20 X 2 (i. Peritheeium : venter 50- 

 55 X 40 /j. ; the neck 90-290 X 20 //. ; the stalk 35-45 x 33-36 p. 

 Appendage, 35-45 /a, the stalk-cell 22-30 X 14-17 /x. Receptacle 55- 

 72 /a. Total length to tip of peritheeium 400-485 /j. A few specimens 

 on the legs much smaller. 



On three small flies of different species allied to Limosina. Ralum, 

 New Pomerania. Perhaps a variety of S. Limosinae. 



Arthrorhynchus Cyclopodiae nov. sp. 



Becoming tinged with brownish yellow except the hyaline stalk-cell of 

 the peritheeium. Peritheeium nearly straight and symmetrical, slightly 

 inflated, usually distinctly constricted in the region of its very small basal 

 cells just above the very large hyaline stalk-cell, which may nearly equal 

 it in length and diameter and is often somewhat enlarged distally : the 

 venter comprising the lower two-thirds, not clearly distinguishable from 

 the neck, which tapers slightly and almost symmetrically, the tip fairly 

 well distinguished above a more or less distinct enlargement, from which 

 it is separated by a slight constriction ; the apex consisting of a crown 

 of four nearlv symmetrical, distinctly tridentate, erect, or very slightly 

 divergent projections, which are subtended by a corresponding number of 

 slight elevations, the middle lobe of each projection more prominent than 





