i9H] thaxter— FUNGUS-PARASITES 243 



tudinal divisions of the cells when they occur, so that they often 

 cannot be clearly distinguished without the use of an immersion. 

 Itr is evident from an examination of the sporophores, that 

 after a spore has matured and has broken off, the portion of the 

 stalk which remains proliferates distally and produces a new spore. 

 Since this may be repeated several times, the spore-formation in a 



%_^ 



may be more 



are not produced. 



Although the species of this genus, all of which occur on living 

 individuals of small flies, are so unlike other entomogenous types, 

 they appear to be similarly limited to definite hosts. This seems 



example, in M . rep 



numerous 



Clasiop 



the very numerous and often closely related flies, which were 

 collected with them in the same locality, are thus parasitized. 



In addition to the species described below, a few others are 

 known, but from lack of sufficient material these are not herewith 

 included. 



Muiaria gracilis, nov. sp. — Plate XVII, figs. 12-13 



Olivaceous 



com 



blackened base. Spores and sporophores very long and slender; 

 the body of the spore not abruptly distinguished from its long 

 terminal portion, or from the sporophore; the cells of the four 

 central tiers very small; the adjacent cells above and below usually 

 undivided by longitudinal septa; the whole rather inconspicuously 

 marked bv more or less elongated darker areas separated by lighter 



this modification involvin 



more 



slender spore-termination; the spore outline even, with hardly 

 indicated indentations at the septa or with none. Total length 

 of spore and stalk 300-480 ju, the stalk about 7 /x in diameter, the 

 body of the spore 14-17 fx in diameter. 



On the legs and inferior surface of the abdomen of Leucoplienga sp., no. 

 2299, Kamerun, West Africa (Schwab). 



