TIIAXTER. — ARGENTINE LAHOILUENIALES. 205 



stout, rrlatixoly short, divergent; the main axis of the iinier aj^pcnchige 

 consisting? of five eells, the lower bearing relatively small stalk-cells 

 terminated hy single large stout antheridia. Stalk of perithecium 

 hyaline, contrasting, very short, constricted; its axis coincident with 

 that of the perithecium and hent inward at a slight hut definite angle 

 to the axis of the receptacle; the body of the perithecium translucent, 

 nearly symmetrical, becoming deeply suffused with clear, slightly 

 reddish olive-brown, subsymmetrically inflated throughout, the tip 

 rather narrow, abruptly distinguished, more deeply suffused; the apex 

 hyaline or becoming suffused, nearly symmetrically rounded or slightly 

 irregular. Perithecium above stalk 110-128X35-38 /i, the stalk 

 8X15-20 yu. Receptacle 98X40-45 /x, its basal cell 45-50X20 /x- 

 Main appendages 20 n, their branches 50-75 /x. Antheridia 20 /x, 

 their stalk-cells 10-12 /x. 



On the mid left elytron of a black species of Galcrita (from two speci- 

 mens). La Plata No. 2021, P. Spegazzini. 



This species resembles small forms of L. punctata, but differs in 

 the complete absence of maculation, as well as in other minor points. 



Laboulbenia marginata nov. sp. 



Basal cell of the receptacle hyaline, cells 11 and III opaque and 

 indistinguishable, forming above a broad black margin extending 

 upward so that the free distal margin is on a level with the insertion- 

 cell; cell IV inwardly yellowish, obliquely elongated, externally dark 

 brown, separated from the upper part of cell III by a clear oblique 

 septum; cell V triangular, similarly suffused externally; both these 

 cells, as well as the rest of the receptacle, transversely punctate. Cell 

 VI and the cells above it subhyaline, soiled with dirty brown: the 

 stalk of the perithecium hyaline, the main body deeply suffused, ex- 

 ternalh' nearly straight and translucent, indistinctly punctate below, 

 inwardly distinctly convex and opaque; the tip abruptly distinguished 

 on both sides, opaque below the asymmetrical sulcate apex; the inner 

 lips prominent, broad, rounded, the outer much smaller, lower, the 

 pore turned obliquely outward. Insertion-cell indistinguishable 

 from the opaque basal cells of the appendages, the blackened portion 

 curved outward and upward and forming a free rounflcd prominence 

 subtending the first outer branch; this blackened area larger than the 

 hyaline compact main appendages, the cells of which are very narrow; 

 those of the outer seven or eight in number, including the basal cell, 

 somewhat obliquely associated in a but slightly oblique series; the 



