246 BOTANICAL GAZETTE [September 



below, that they are hardly differentiated from them. This appears 

 to be due to the fact that the two median flattened cells from which 

 these tiers are formed do not divide transversely, as in the other 

 species, before the longitudinal septa appear. In one group, a 

 portion of which is represented in fig. 8, the spores have begun to 

 germinate in situ, and it is noticeable that the rhizoid-like germ 

 tubes all arise from cells of the middle region. Although . other 

 species have been found growing on the wings of flies, it is only 

 in the present instance that a creeping series of hyphae is produced, 

 in place of the usual compact tuft. This repent habit seems there- 

 fore to be specific. The species seems to be distinctly limited to a 

 single host, of which perhaps two dozen have been found infested, 



i 



and here it may be remarked that the species of Stigmatomyces , 

 which inhabits the same insect, was found to occur much more 

 rarely. It is thus evident that, however unsuited such a form as 

 the present may seem to its parasitic habit, it is actually quite 

 as successful as the Stigmatomyces, which is so peculiarly adjusted 

 to this mode of life. 



Two other forms very closely allied and perhaps identical with 

 this species, but less definitely repent and differing in minor points, 

 have been examined on species of Clasiopa from Sarawak and from 

 Trinidad; but sufficient material is not available for a definite 

 determination in either case. 



Chantransiopsis, nov. gen. 



Entomophilous. Filaments firm, elastic, persistent, thick- 

 walled, colorless, septate, growing in variably developed tufts 

 attached to the body of the host by an opaque black base, or foot; 

 variably branched; the terminal branches sterile or fertile, and 

 bearing solitary terminal simple spores successively abjointed. 



This type was first found growing on living specimens of the 

 staphylinid beetle Xantholinus near Fresh Pond, in Cambridge, 

 where scanty material, largely sterile, was obtained in the autumn 

 of 1900 and 1902. Later, among a number of Javan beetles sent 

 in alcohol by the late F. Rouyer, two more genera of staphylinids 

 were found to be similarly infested, as well as a third species belong- 

 ing to the Hydrophilidae. Although it has been sought for on 



