Eumycetes. 521 



Thaxter, R., New or critical Laboulbeniales from the 

 Argen t ine. (Contr. Cryptog. Labor. Harvard Univ. LXIX. Proc. 

 Amer. Ac. Arts and Sc. XLVIII. p. 155-223. 1912.) 



The materials were collected in Argentina, chiefly in the 

 Buenos Aires region. FoUowing new or interesting genera and 

 species are described in this paper. 



Dimeromyces Anisolabis. on Auisolabis amniHpes Luc, closely 

 allied to D. Forficiilae. The male individual is distinguished b}- the 

 presence of onl}^ one suffused septum in its appendage, as well as 

 by its shorter stouter form and outcurved antheridial necks. Only 

 one appendage arises from the terminal cell of the receptacle of 

 the feraale, and the character of the lower appendage, and the form 

 of the perithecium are also different. D. Coryjütis on Corynites nifi- 

 collis Fabr., distinguished b)^ its mitriform sterile appendage-cell. 

 D. Meronevae, on Meroneva Sharpil^. A., D. veriicalis on Athetas'p., 

 a variable species. 



Rickia Lispiiii on Lispitius teneUus Er., differs from all the other 

 species in the fact that all its appendages come from the two distal 

 marginal cells. R. MelanopJitalniae on Melanophtalma spec, distin- 

 guished by the apparent absence of any secondary appendages. 



Monolcomyces Caloderae, on Calodera sp., most nearly allied to 

 M. similis and M. Homalotae from both of which it is distinguished 

 by the character of its primary appendage and \)y the proliferous 

 habit of its fertile branches. M. infuscatus Speg.. on Xantholhms 

 Andimis Fauv., closely allied to M. nigrescens and distinguished 

 especiall}^ by its rigid black primär}^ appendage. 



Minieoniyces nov. gen. similar to Corethyoniyces Quedioniichi, 

 except that the lower branches of the appendages bear conspicuous, 

 typically developed Compound antheridia. M. decipiens on Quedius 

 sorecocephaliis Beruh, n. sp. 



CmitJiaroniyces pennasculics, distinguished from C. platensis by 

 the form and color of the perithecium and its short stalk-cell, by the 

 annular prominences of the receptacle and appendage, which are 

 without striations, by its usually more elongate straight receptacle 

 the axis of which coincides with that of the perithecium, not of the 

 appendage as in C. Brnchi, and by its much more highh' developed 

 appendage, which may produce more antheridial cells than are 

 known in any other of'the Laboulbeniales. C. Platensis, on Parnus? 

 sp , allied to C. Bvuchi Speg., which is half as large and differs in 

 many characters. 



AmoYphoniyces Ophioglossae , on Ophioglossa sp. yi. riibescens on 

 Diestota sp. 



Tetrandroniyces nov. gen. with male individuals consisting of 

 four superposed cells the uppermost bearing a crown of four simple 

 antheridia, the general structure of the female as in Dioiconiyces. 

 T. BracJiidae, on Brachida Reyi Shp. 



Dioiconiyces Forniicellae, on Forndcella strangulata Pic, a very 

 large species. D. inalleolaris, on Anthicus parvus Pic, grows more 

 or less appressed, the perithecium lying at right angles to the axis 

 of the elytron. D. umbonatus , on Anthicus parvus, nearly related 

 to D. Anthici, and to D. angularis, from which it is distinguished 

 by the umbonate prominence resulting from the Inflation of one of 

 the basal wall-cells. D. angularis, on A. parvus, distinguished from 

 D. Anthici chiefl}'- by the angular or triangulär form of its peri- 

 thecium. 



Autophagoniyces nov. gen., male individual, attached to the 



