E. H. STRICKLAND. 



Some larvae contain but one mass whereas others contain two 

 to four. The muscles are unaltered, but the fat body is much 

 reduced. The alimentary canal always appears to be contorted. 

 In only one case had the Microsporidea failed to sporulate and 

 they then formed a swelling on the external intestinal surface. 

 The sacs contain countless ovoid, refractive spores, which, when 

 treated with iodine, show a filament 15-20 times as long as their 

 longest diameter. Spores of two sizes are present, the smaller 

 measuring 4-5/11, the larger 8/j.. In a subsequent note written 

 in collaboration with Hagenmueller ('08) Leger states that the 

 spores are sometimes present in a polysporic and sometimes in 

 an octosporic arrangement. These authors also refer to a simi- 

 lar parasite in the larvae of Tipula gigantea. 



From the foregoing notes it will be seen that the disease which 

 occurs in S. hirtipes is very similar in its main features to that 

 described by Leger, and I do not hesitate to regard the organism 

 responsible for its occurrence as a closely related form. Pro- 

 fessor Calkins is inclined to consider the various forms I have 

 described as belonging to a single species. For this I would 

 propose the name Glugea polymorpha sp. nov. Future investi- 

 gation, however, will quite possibly show that the various forms 

 occurring in different localities are not all representatives of the 

 same species, since numerous dissections of diseased larvae 

 showed that certain types of spores were peculiar to different 

 localities even though present in two different species of Simidiiim 

 larvae. 



