16 BOTANICAL GAZETTE [January 



Two species of this genus have been described by Spegazzini, 

 to one of which, T. infuscata, he refers the form represented in fig. 31 

 of my former paper, which represents an individual found on 

 Labia minor in Cambridge, and is distinguished by the fact that 



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the two upper cells are not separated by an oblique septum. His 

 second species, T. subhyalina, which occurs on Aphodius, is said 

 to be distinguished by the fact that it is always hyaline, the neck 

 more strongly curved, and the basal cell relatively shorter. 



A second genus of a similarly nondescript type has been named 

 Entomocosma by the same author (loc. cit., fig. 7, pp. 312-315). Al- 

 though possibly related to the present genus, its essential characters 

 are not at all clear. It seems in some respects similar to a prob- 

 lematical type, of which I have material collected at Waverly, 

 Massachusetts, in 1893, on Tachinus pallipes, and which I have 

 not subsequently observed. 



It is to my mind very doubtful whether any close relationship 



exists between these genera of " Thaxteriolae, " to which two others 

 are added below, and the " Anf oromorf as " with which Spegazzini 

 associates them, and of which the Amphoromorpha entomophila of 

 my former paper may be taken as the type. As in the case of 

 CoreomycetopsiSy however, their relationships to other groups are 

 equally obscure, and they must remain among the "genera incertae 

 sedis " until the discovery of further types which may possibly throw 

 some light on their affinities. 



Endosporella, no v. gen. — Axis consisting of 4 superposed cells, 

 the basal attached by a well differentiated foot; the terminal one 

 spinose, separating uniseriate endospores distally, which escape 

 through a terminal pore. 



Endosporella Diopsidis, nov. sp. (figs. 39-41). — Foot small, 

 black, and pointed; basal cell abruptly narrower and hyaline 

 below, the upper half becoming much broader and somewhat in- 

 flated distally, obliquely suffused with blackish brown. Second 

 and third cells much shorter, subequal, or the upper usually slightly 

 longer and broader; terminal cell a sporogonium, sometimes as 

 long as the rest of the individual, deeply tinged with blackish brown, 

 except the hyaline tip, which is primarily spinose and becomes 

 perforate, the upper half or more becoming filled with a simple 



