THAXTEK. NEW LABOULBENIACEAE. 35 



Perithecia 150-165 X 58-62 /i, sometimes smaller. Receptacle 185- 

 220^. Total length 290-360^. 



On Disenochus fractus Sharp, Kaui, No. 1222 ; D. agonoides Sharp, 

 Haleakala, Hawaii, No. 1229; D. aterrimus Sharp, Kaui, No. 1218; 

 D. sulcipennis Sharp, Kaui, No. 1219 ; Brosconegneus optatus Sharp, 

 Oahu, No. 1215. 



Laboulbenia Dryptae nov. sp. 



Perithecium usually nearly straight, often nearly symmetrical, the 

 region corresponding to the basal wall-cells usually distinctly differ- 

 entiated, hyaline or transparent, brownish, becoming darker in older 

 individuals, concolorous with the basal and other cells below ; but in 

 general contrasting strongly, but not abruptly, with the rich dark brown 

 of the rest of the perithecium above it, which may become opaque ; the 

 tip often bent slightly outward, not abruptly distinguished ; the inner 

 lip-cells more prominent and deeply suffused, except the edges. Recep- 

 tacle rather short, punctate, becoming more or less, and rather irregu- 

 larly, stained with brown, often blackish along the posterior margin up 

 to the insertion-cell, which is thick, well defined, contrasting. * The 

 appendages rather slender ; the outer nearly straight in normal individ- 

 uals, simple, divergent, rigid, tapering ; the basal cell more than twice as 

 broad, subhyaline, with brownish suffusions next its deep black contrast- 

 ing outer wall, the opacity sometimes involving the subbasal cell, which 

 is similar and similarly blackened externally, as is the cell next above : 

 the inner appendage simple, or more often once branched above the sub- 

 basal cell, divergent like the outer, brownish yellow, the antheridia borne 

 singly from the lower cells. Perithecia 110-150x35-40/1. Recep- 

 tacle 135-180//. Longer appendages 220^. Total length to tip of 

 perithecium 220-250 //. 



On Drypta ruficollis Dej., Natal, Africa ; British Museum, No. 506. 



Laboulbenia dubia nov. sp. 



General form closely resembling that of L. rigida, the shape of the 

 perithecium similar, except that the tip is smaller, more abruptly distin- 

 guished ; the lips outwardly oblique, the blackish inner lip-cell more 

 prominently rounded and subtended by a slight, usually distinct rounded 

 elevation, which gives the tip a characteristic outline ; the body dark 

 translucent brown, wholly free. The receptacle very thick-walled, pale 

 dirty yellowish brown, deeper distally. The basal cells of the append- 

 ages suhequal, the outer bearing two branches radially which are simple, 



