96 MUSEO NACIONAL DE BUENOS AIRES. 



que perspicua repando - angulata (1-3 mm dm.) utrimque 

 planissima, opaca glabra; loculi 1-5 in quoque stromate ad 

 Iwpophyllum vix prominuli semilenticulares (120-150 [j- dm.), 

 obsoleteostiolati, contextu subcarbonaceo opaco indistiucto; 

 asci a basi ad apicem sensim leniterque attenuati ápice sub- 

 truncato-rotundati crasseque tunicati, postice abrupte bre- 

 vissiineque cuneati in pedicello brevissimo producti (90-100 

 ¡j- 14-16 ¡a), octospori, paraphjsibus omnino destituti; sporae 

 2-3-stichae. rectae v. leniter inaequilaterales utrinique acutiu- 

 sculae (40-45 ;j. = 4-5 u. ) continuae v. 4-5-blastes, primo túni- 

 ca mucosa byalina laevi vestitae, dein nudae, laeves. 



1464. Balansia trichloridis Speg. (n. sp.) 



Diag. Stromata discoidea sessilia matrici vix incrassata 

 leniterque infascata gregarie insidenfia, planinsctila, suhlaema, 

 carbonacea, locnUs elliptico-globosis confertis, ascis cylindraceis, 

 sporis filiformibus hyolinis. 



Hab. Ad culmos vivos Trichloridis mendocinae in aridis 

 circa Mendoza, Jun. 1911. 



Obs. Internodia infecta vix incrassata et sordide ciñera - 

 scentia, recta rigidula subfragilia; stromata lase v. densiu- 

 scule gregaria, orbicularia v. subelliptica, parva (1-3 mm 

 dm.) plañe sessilia, superne plana non v. vix rugulosa v. sub- 

 punctulata, margine obtusa v. subtruncata, extus intusque 

 atra non nitida, contextu opaco indistincto; loculi constipati 

 (200-250 [i. alt. ^= 120-200 a dm.) erecti non prominuli obsoleto 

 papillato-ostiolati; asci praelongi (200 ¡jl= 6 ij.) ápice rotun- 

 dati crasseque tunicati, postice attenuati ac in pedicello 

 subbreviusculo gracili producti, aparaphysati, octospori; 

 sporae utrimque acutiuscule rotundatae (120 - 150 ;-«■ = 1 [>■), 

 rectae v. leniter flexuosae non v. minute multiguttulatae. 



Species Plowrightiae habitu externo simillima,sed ascorum 

 sporarumque fabrica distinctissima neo quidem comparanda. 



1465. Microphyma macrosporum Speg. (n, sp.) 



Diag. Perithecia hypophylla pusilla laxissime subgregaria, 

 ascis obovatis, sjjoris conglobatis 1-septatis non v. vix constrictis, 

 utrimque obtnsissimis, mojuscidis, hyalinis. 



Hab. Ad folia viva Maxillariae rufescentis in nemorosis 

 prope Bompland, Misiones, Nov. 1909. 



Obs. Maculae nullae; perithecia bine inde 3-7-gregaria 

 discreta, semilenticularia, (500-l(X)0 u dm.) matrici arete 

 adnata, extus uigra glabra, contextu corticis ¡Darachymatico- 



