310 



THAXTER. — MONOGRAPH OF THE LABOULBENIACEyE. 



Receptacle relatively large, hyaline, the basal cell tapering slightly downward, the subbasal cell slightly 

 longer and much broader distally. Perithecium : venter 55 X 30 fi; neck 75 X 10 /<. Appendage about 

 75-80 ft, stalk-cell 28 ji. Receptacle 110 X 25 fi. Total length to tip of perithecium 250-275 fi. 



On the inferior surface of the abdomen and at the base of the posterior legs of a species of Limno- 

 pkorus. Berkeley, California. 



The material on which this species is based was found on two specimens of Limnophorus sent from 

 Berkeley with a miscellaneous lot of flies collected by sweeping. Although the perithecia are not quite 

 mature, the characters of the species are sufficiently well defined. S. Sarcophagae being the only form 

 with which it is likely to be confused. The two are most readily distinguished by the appendage which 

 is shorter, with more antheridia, in the present species. It is evidently somewhat proliferous, but I have 

 been unable to determine the position of the spiniferous cell. 



Stigmatomyces humilis Thaxter. Plate XLVII, figs. 29-32. 

 Proc. Am. Acad. Arts and Sci, Vol. XXXVI, p. 401. June, 1901. 



Venter of the perithecium amber-brown, slightly inflated throughout and slightly asymmetrical; 

 the neck rather abruptly distinguished, concolorous, but paler distally, generally shorter than the venter, 

 stout, tapering to the blunt, hardly differentiated apex; about one third of its length taken up by the tip, 

 which is distinguished from it by a slight broad constriction; the outer basal cells subequal and irregu- 

 larly prominent. Appendage relatively rather slender, very long, sometimes extending nearly to the 

 middle of the neck of the perithecium, the stalk-cell separated by a slight constriction from the basal cell, 

 which is relatively large, the annular thickening about the base on the inner side of its wall unusually 

 well developed, amber-brown, bearing two antheridia; the subbasal cell almost as large, bearing two 

 antheridia, the two successive cells above it smaller and bearing each a single antheridium; the series 

 completed by a single terminal antheridium; the antheridial necks rather slender, and tapering, some- 

 what appressed. Receptacle short, stout, the cells subequal. Spores about 28 X 3 fi. Perithecium: 

 venter 46-55 X 32-37 /z; neck 45-47 /£. Appendage 65-75 p., the stalk-cell 18 p.. Receptacle 55 fi. 

 Total length to tip of perithecium 175 ji. 



On the superior surface near the tip of the abdomen of a muscid somewhat larger than the other 

 hosts from Ralum, New Pomerania. Berlin Museum, No. 1287. 



This small and somewhat insignificant species is distinguished by its compact habit, the large venter 

 and short neck of its perithecium, and its relatively large and elongate appendage, which may reach to 

 the middle of the perithecial neck. Its terminal antheridium is spinose just below the neck. 



Stigmatomyces dubius Thaxter. Plate XLVII, figs. 14-18. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVI, p. 402. March, 1901. 



Amber-brown with the exception of the receptacle and the stalk-cell of the perithecium. Venter of 

 the perithecium slightly inflated, relatively small, not abruptly differentiated from the broad neck, which 

 gradually enlarges distally below the rather abruptly tapering, slightly bent tip; the middle of the three 

 posterior projections from the lip-cells larger and longer than the others and bent over so as to overlap 

 the anterior lip-cells, which are curved abruptly toward it; the two lateral posterior projections prominent 

 beyond the base of the middle one, rather slender, and slightly curved inward. Stalk-cell of the append- 

 age distally darker, abruptly prominent below the basal cell, which is small, squarish, and deeper brown; 

 the rest of the appendage, which is unusually long, apparently proliferous above the spiniferous cell, 

 extending beyond the venter of the perithecium, is made up of about eight cells, which bear rather long 

 antheridia in pairs, their necks appressed usually in a lateral series. Receptacle relatively large, hyaline, 

 the subbasal cell much longer and broader than the basal cell, which tapers but slightly to the small foot. 

 Spores 30 X 3.5 /x. Perithecium: venter 58 X 40 (i; neck 110 X 25 fi. Appendage 80-95 fi, stalk-cell 

 25-32 fi. Receptacle 145-185 X 25-30 ll. Total length 350-375 ;i. 



On a fly with monstrously developed anterior legs resembling those of Ochiheria maniis. Ralum, 



