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nicus, postice attenuatus, basi rotundatus parcissimeque 

 radicatus, farctus carneo-fuscus y. melleo-fulvus. Caro 

 iü pileo tenuis, iu stipite fibrosulo-compactiuscula, 

 fusco-carnea, hygmphana. 

 Hab. In campis praecipue ad coespites azorellarum 

 (tucála abincolis vocatos) prope Ushuvaia., Maj. 1882. 



9. Agaricus (collybia) ushuvaiensis Speg. (n. sp.) 

 Díag. Pileus subhemisphaerico-explanatus (4" diam.), 



late grossequeumbonatus, laevissimus, glaberrimus vix 

 udus viscosus, castaneo-fuscus v. testaceo-fuscescens, 

 margine integer v. vix repandulus; lamelle fusco-albi- 

 cantes, latae (1" lat.) polymacriae, confertiusculae, 

 longe sinuato-adaatae, crassiuscule membrauaceae, acie 

 iutegerrimae, pallidiores ; stipes pro ratione curtus 

 crassusque (5-5,5" long. x 1" diam. sup. = 1,5-2" 

 diam. inf.), vicies tortus, glaberrimus, \ix minutissirae 

 torto-fibrillosus, pileo concolor, superno pallidior, farc- 

 tus, mycelio parco albicante ornato. Caro flaccidula, 

 albo-fuscescens, illa stipitis fibrosula tenacella. Velum 

 nullum. 



Hab. In sylvis fagineis prope Ushuvaia, Beagle Chan- 

 nel, Maj. 1882. 



Obs. Sub iove pluvio fungus totus subhygrophanus evadit. 

 In senectute flaccescens ac veré foetidus. Sporae ellip- 

 tico-obovatae, superno obtusae, inferné acutatae(10 

 X 5 \x), laeves, hyalinae. 



10. Agaricus {imjcena) cilotus Speg. (n. sp.) 



Diag. Parvulus, fulvus, puberulus, sparsus; pileus primo 

 subhemisphaericus (2-6'" diam.), margine subincurvulus, 

 densiuscule pilosus, dein subcampanulato-expansus, 

 subumbonatulus, dense puberulus, margine acutiu- 

 sculus, rectus, integer, fulvo-melleus, centro intensius 

 coloratus; lamellae paucae distantes, postice adnato- 



