THAXTFR.^ ARGENTINE LABOULBENIALES. 219 



In addition to tlu' new forms above described the following species 

 were found, and also a few others that are not determinable. 



Acompsomyces hrunneolus Th. A species closely allied to the North 

 American form, was obtained at Palermo on a small Cortlcaria (?) 

 The conformation of the tip of the pcritheciiim is very similar, but 

 the latter is shorter and stouter, its broad base abruptly distinguished 

 from the somewhat longer narrower straight stalk-cell. The stalk- 

 cell of the appendage is also quite hyaline. Since the type form has 

 been found onl}^ once, its variations are not yet known, and it seems 

 inadvisable to separate the Argentine form until further material of 

 both is available. 



Campiomyccs melanopus Th. Several well matured and typical 

 specimens of this species were found on the abdomen of Sunius sp., 

 No. 2002, at Temperley, but although very many specimens of Sunii 

 were examined it was not again met with. 



Chactomyccs PinophUi Th. was found very rarely on Pinophilus 

 siiffusus Er., although its host was very common at Llavallol. The 

 material differs in no respect from that obtained in North America. 



Ceratomyces mirabilis Th. was very common on Tropisterni at 

 Palermo, near Belgrano, the specimens exactly like those from New 

 England. 



Ceratomyces ansaius Th. was also common, and as usual did not 

 occur on the wholl}' black species of Tropisternus. 



Ceratomyces filiformis Th. Several typical specimens were ob- 

 tained growing at the tip of the posterior legs of several Tropisterni. 



Ceratomyces minisculus Th. was found once on a species allied to 

 T. lateralis. 



Compsomyces verticillatus Th. was found rather rarely on species 

 of Sunius at Temperley and Llavallol, Nos. 1995 and 2002, the 

 individuals differing in no essential respect from the North American 

 type. 



Corethromyces purpurascens Th. This species was found very 

 commonly in the vicinity of Buenos Aires on an evenly, rather pale 

 brown species of Cryptohium, and appears to be very constant in its 

 characters, varying only in the luxuriance with which the branches 

 of the appendage are developed. 



Corethromyces Stilici Th. This species was found in abundance 

 on several species of Stilicus, the normal form like that first collected 

 at Interlaken, Switzerland, being sometimes associated with one in 

 which the stalk-cell of the perithecium is enormously developed, the 

 body of the perithecium being at the same time more elongate, its 



