THAXTER. 



MONOGRAPH OF THF. L A HOI ' L H K X T A ( ' EA'l . 



31 1 



New Pomerania. Berlin Museum, No. 12X1 and 1298. On the head and at the base of the pos- 

 terior legs. 



This speeies is chiefly peculiar for its long flat apprcsscd appendage, the axis of which consists of 

 eight or more cells including the basal cell. The spine arises from the base of the eighth cell where its 

 position has been determined. The neck of the perithecium is relatively stout and has a "bloated" look 

 and is usually not abruptly distinguished from the venter. 



Stigmatomyces Limosin.tc Thaxter. Plate XLV1I, figs. 17. 



PPOO. Am. Acad. Ails and Sci., Vol. XXXVI, p. 406. March, 1901. 



Perithecium amber-brown, the venter slightly inflated, the neck not abruptly distinguished, tapering 

 slightly; the tip usually abruptly narrower, the posterior lip-cells forming an inconspicuous irregular 

 truncate or rounded bilobed projection somewhat more prominent than a similar projection formed by 

 the anterior lip-cells; basal cells relatively very large, forming a short, well-defined stalk, hyaline or col- 

 ored above, often carrying the base of the perithecium beyond the tip of the appendage, and consisting 

 of an inner cell next the appendage and two superposed outer ones, the lower of which (secondary stalk- 

 cell) is smaller; the stalk-cell below these wholly united to the stalk-cell of the appendage, rather stout 

 and short, separated from the cells above it by a horizontal septum, which may be slightly oblique or (as 

 in the California variety) strongly oblique, in which case the secondary stalk-cell extends downward 

 beside the stalk-cell so that only the lower third or quarter of the latter is free externally. Stalk-cell of 

 the appendage relatively large, as long as or often longer than that of the perithecium and about half as 

 broad, usually bulging externally, its outer margin usually curved symmetrically from its base to the base 

 of the basal cell; the latter relatively small, deep amber-brown, half as long as broad, pointed distally 

 between the antheridium which arises from its inner side and the base of the first fertile cell above it, 

 which, with the other fertile cells, are large and prominent, thick walled, much flattened, and obliquely 

 superposed, distinguished by rather deep constrictions, seven to ten in all, or rarely more (seven to four- 

 teen in the Californian form), the original number being increased by the terminal proliferation of the 

 appendage; the antheridia borne on the inner side of the appendage, their very long but not abruptly 

 differentiated necks extending obliquely upward, appressed in a double series; the upper antheridia 

 often infertile, becoming septate and irregularly swollen. Receptacle relatively short, the two cells nearly 

 equal. Spores 2S X 3 p. Perithecium: venter 50-90 X 40-54 ft] neck 90-125 X 15-18 ft; stalk (basal 

 cells only) 72-100 X 25-35 ft. Appendage 60-100 ft, stalk-cell 30-45 ft. Receptacle 70-75 X 22 fi. 

 Total length to tip of perithecium 250-360 fi. Specimens on legs often much smaller. 



On Limosina fontinalis Fallen. Kittery Point, Maine; vicinity of Cambridge, Mass.; on Lirnosina 

 sp., Berkeley, California. Usually in a dense tuft on the side or near the tip (inferior) of the abdomen 

 and near the base of the posterior pair of legs. 



The Californian material, figs. 3-4, from two specimens of the host, differs constantly from the 

 abundant New England material as noted in the description, as well as from the fact that the venter of 

 the perithecium is longer and less distinctly inflated, while its apex shows no perceptible modification of 

 the lip-cells. The speeies is remarkable for the repeated proliferation of its appendage, which makes 

 the primarily terminal spinose cell intercalary, the distal cells unlike those of any other species, with the 

 exception of the nearly allied S. Papuanus, being usually sterile. The host is a small fly, beset with 

 coai'se hairs, and captured by sweeping around muddy ponds or over wet places in woods. 



Stigmatomyces Papuanus Thaxter. Plate XLVH, figs. 8-13. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVI, p. 407. March, 1901. 

 Venter of the perithecium dark amber-brown, relatively small and rather prominently inflated, oval 

 to elliptical; usually not abruptly distinguished 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), subcorneal, the posterior lip-cells forming 

 a narrow, subtruneate, slightly recurved apical projection beyond the two laterally placed, papillate, 



