176 PROCEEDINGS OF THE AMERICAN ACADEMY. 



basal cell similar to that of the outer or slightly smaller, producing a 

 branch on either side, each usually ouce branched, all the branches pale 

 yellowish with occasional brown suffusions, the longest not greatly ex- 

 ceeding the tip of the perithecium. Spores 35 X 3 /x. Perithecium 150- 

 200 X 35-55 yx. Total length to tip of perithecium 275-380 fi ; to inser- 

 tion-cell 140-190^. Width 34-40 /t. Appendages 175-275 /i. 



On Gasnonia sp., Paris Mus. No. 116 bis, Bahia, Brazil. At base of 

 elytra and on superior prothorax. 



Laboulbenia fallax nov. sp. 



Perithecium becoming dark dirty olive-brown, the tip blackened, bent 

 outward, the lips hyaline. Receptacle becoming concolorous with the 

 perithecium except the hyaline slender basal cell, the remaining cells 

 usually short and stout except cell V, which extends up along the inner 

 margin of the perithecium nearly to its tij), its inner margin continuing 

 the curvature of the tip down to the insertion of the appendages, so that 

 the perithecium seems at first sight twice its actual size. Insertion-cell 

 unmodified, forming a slight rounded external prominence within which 

 the basal cells of the appendages form an evenly curved base from which 

 arises a single antero-posterior row of branches about twelve in number, 

 their lower cells slightly inflated, hyaline with dark septa, usually twice 

 branched ; the ultimate branchlets above the third or fourth septum slen- 

 der without dark septa, scarcely exceeding the tip of the perithecium. 

 Perithecium 100-120 X 35-40 /x. Total length to tip of perithecium 

 190-325 /Li; to insertion-cell 120-250 /x. Greatest width 85 /x. Appendages 

 50 /x. (The larger measurements are from the Amazon specimens.) 



On Gyretes acutangulus Sharp, Brit. Mus. No. 771 (Biologia Coll.), 

 Bugaba, Panama; on Gyretes sp., Brit. Mus. No. 477, Amazon River; on 

 Gyretes sp., Hope Coll. No. 229, Rio de Janeiro. At tips of elytra. 



Laboulbenia finitima nov. sp. 



Perithecium one half to two thirds or more free, olivaceous brown, 

 lighter distally, becoming wholly dark brown, straight or curved outward 

 rarely inward ; the tip broad, rounded, generally not well differentiated, 

 blackish. Receptacle relatively small, the basal cell hyaline or yellowish, 

 the rest concolorous with the perithecium; cells III-V lighter, cell VI 

 extending down almost to cell I. Appendages brownish or pale oliva- 

 ceous, the outer sinaple, its basal cell twice as long as broad, externally 

 more deeply tinged with brown ; the basal cell of the inner appendage 



