THAXTER. — NEW LABOULBENIACEAE. 403 



Stigmatomyces gracilis nov. sp. 



Form long and slender. Venter of the perithecium amber brown, 

 relatively large above its narrow base, more or less inflated, often more 

 distinct distally ; the neck usually straight, sometimes curved, nearly hya- 

 line as a rule, and abruptly distinguished ; the tip abruptly but slightly 

 narrower above a prominent and usually symmetrical iuflation ; the me- 

 dian posterior projection of the lip-cells erect, larger, and slightly more 

 prominent than the two lateral ones, which diverge slightly and are nearly 

 symmetrical with the two anterior ones. Stalk-cell of the appendage 

 slightly prominent distally below the dark amber-brown basal cell, which 

 may be more than half as large, bearing one or two antheridia ; the re- 

 maining cells four in number, relatively large, except the fourth, which 

 bears a large, curved, conspicuous spine below the base of the terminal 

 antheridium ; the antheridia in pairs, lateral or obliquely external, the 

 necks short, becoming pointed and slightly divergent. Receptacle usu- 

 ally rather long and slender, straight or curved, hyaline ; the two cells 

 about equal, or the upper larger and distally often broader than the com- 

 bined diameters of the cells above it. Spores 45 X 3.5 /x. Perithecium: 

 venter 85-90 X 30-40 //, ; neck 100-110 X 16 /a (the enlargement X 

 20 /x). Appendage 70-75 /x, stalk-cell 18-25 /x. Receptacle 90-125 X 

 18-20 ft. Total length to tip of perithecium 250-360 ^. 



On the same host with S. dubius. Ralum, New Pomerania. Berlin 

 Museum, No. 1298. Near the tips of the posterior legs. 



Stigmatomyces proboscideus nov. sp. 



Venter of the perithecium amber brown, sometimes more than twice 

 as long as broad, usually but slightly inflated, often more so distally ; the 

 neck lighter brown, rather abruptly distinguished, relatively very stout, 

 elongate, nearly isodiametric, usually curved throughout ; the short tip 

 abruptly somewhat narrower, the apex broad and blunt without well de- 

 veloped elevations. Stalk-cell of the appendage brown, relatively small 

 and short, slightly prominent distally ; the basal cell broader than long, 

 the five fertile cells above it rather short and stout, the series curved 

 sidewise, the antheridia lateral in pairs. Spores about 30 X 3 yii. Peri- 

 thecium : venter 75-95 X 32-36 ^u; neck 135-185 X 18-22 yw. Appen- 

 dage 55-72 /A, stalk-cell 18 /x. Receptacle 110-125 X 29 /x. Total length 

 to tip of perithecium 400 fx. 



On the abdomen of a small fly. Ralum, New Pomerania. Berlin Mu- 

 seum, No. 1288. 



