1920] THAXTER— FUNGUS-PARASITES 15 



ever, since in his generic diagnosis he says that "articulum su- 

 premum sporis amoeboideis repletum," appears to assume that 

 the latter supposition is correct. I have not seen the sporogo- 

 nium "sporis repletum/' and the usual appearance of the individuals 

 examined has been that shown in figs. 37, 38, the spores occupying 

 the upper portion of the cell and being arranged in a single series, 

 not irregularly disposed as in Spegazzini's fig. 5, and similar to 

 that which occurs in the closely related Endosporella described 

 later. It should be pointed out, however, that in the genus Laboul- 

 betiiopsis, a description of which follows, and which appears to be 

 otherwise similar, a simultaneous formation of irregularly distrib- 

 uted spores appears to take place. 



In order to facilitate a direct comparison between this type and 

 the others here considered, I append a description of a Javan form 

 that seems sufficiently distinct for ready recognition. Since they 

 are now known to occur on such diverse hosts as gamasid mites, 

 Forficulae, Hemiptera, and Coleoptera, it may be assumed . that 

 numerous species of this group exist, none of them too well defined ; 

 and it is probable that by the time systematists have finished with 

 them, posterity will have become burdened with a horde of these 



uninteresting little plants. 



Thaxteriola nigromarginata, nov. sp. (figs. 37, 38). — Subsigmoid, 

 pale brownish, except the clear hyaline base and apex; the distal 

 half edged with deep blackish brown, the suffusion broader toward 

 the middle. The basal cell including half the total length; its 

 extremity slightly broader than the distal half, the lower cell of 

 which is very obliquely distinguished from the upper, and is dis- 

 tinctly concave on its longer side, being also free from any blackish 

 suffusion. Total length 62-68 m ; greatest width (distal portion of 

 basal cell) 8-8 . 5 /*. 



On the hairs of a minute staphylinid, no. 2082, Samarang, Java. 



I am indebted to Jacobson for the host bearing this species, which 

 was found among a few beetles collected at Samarang. It seems sufficiently 

 well distinguished from the types usually common on Staphylinidae by its 

 slightly sigmoid outline, more slender distal half, the lower cell of which is 



very 



sporogenous 



and rather clearly circumscribed black marginal suffusion of the latter, which 

 contrasts strongly with the adjacent hyaline areas. 



