laAXTlilR. 



ARGENTINE LABOULBENIALES. 195 



Laboulbenia Veliae nov. sp. 



Receptacle dirty olivaceous, concolorous with the perithecium, 

 ■cells I and II forming a stout elongate stalk about five times as long 

 as the scarcely broader distal portion. The insertion-cell broad and 

 thick, deep reddish, not quite opaque; the outer and iimer l)asal cells 

 of the appendages subequal; the appendages hut faintly suffused 

 or subhyaline, once or twice somewhat irregularly branched; the 

 branches divergent, the two or three lowest cells short, slightly in- 

 flated, distinguished by dark thin septa. Perithecium not wholly 

 free, narrow, geniculate below the tip, the pore lying laterally on the 

 inner side in the angle formed between the small rounded hyaline 

 prominent inner lips and the greatly enlarged outer lip-cells, which 

 are deeply suffused externally on the side above the pore, above 

 and beyond which they form a characteristic large blunt erect slightly 

 bent process, which terminates the perithecium. Spores 50X7 /i. 

 Perithecia 125-130X24 /z- Receptacle 235-260 )u; cells I and II 

 200X 18 M- Appendages including longest branchlets, 200 fx. Total 

 length to tip of perithecium, largest, 350 ijl. 



On the superior surface of the thorax of Velia Platensis Berg., 

 No. 1951, Palermo near Belgrano. 



A very distinct species, remotely resembling L. ceratophora and its 

 allies. A small group of adult specimens was found on the same 

 individual with L. hemipteralis. 



Laboulbenia Lacticae nov. sp. 



Receptacle hyaline, becoming very faintly tinged with brownish 

 yellow; cells I and II subequal, nearly as broad as the much reduced 

 distal portion ; cells III, IV and \T not greatly diflferent in size, the 

 insertion-cell occupying but half of the distal surface of cell IV, the 

 rounded outer half of which is free externally. Basal cells of the 

 appendage involved by the opacity of the insertion-cell, and indis- 

 tinguishable; the outer bearing a compact group of six or eight 

 suberect branches in two radial rows, or more irregularly placed, 

 which bear short branchlets on their inner sides, and consist of two 

 parts; a basal, seated on an almost hyaline cell and composed of 

 rather short cells deeply suffused with blackish brown and constricted 

 at the septa, and a distal portion suffused only at its base, abo\e which 

 it is quite hyaline rigid and tapering: basal cell of the inner appendage 

 bearing one or two short branches on which one or two antheridia 



