TIIWTKR. — ARGENTINE LABOULBENIALES. 211 



described recently by Picard to which further relerence i.s made below 

 under Edcinomyces. 



Scelophoromyces Osorianus no\ . sp. 



Pale straw- or ainbcr-yeMow, concolorous, becoming- (hrty amber- 

 brown with age. Perithecium subsyninietrical; main body distin- 

 guished from the shghtly broader basal cell-region; of nearly equal 

 diameter throughout, or but slightly inflated, the short stout tip 

 abruptly distinguished, bent slightly outward; the apex broad and 

 nearly truncate; the basal cells subequal, large, slightly prominent; 

 two to six cells superposed to form the perithecial branch; the sup- 

 porting branches simple, septate, tapering throughout to pointed 

 extremities; two to four in number, one of them usually derived 

 from the subbasal cell of the receptacle on the side opposite the peri- 

 thecial branch. Main appendage, or secondary receptacle, consisting 

 of eight to ten superposed cells, terminated by a more slender portion 

 similar to the branches, which arise distally from cells obliquely sepa- 

 rated on one or both sides of the upper cells of the main appendage; 

 the branches more or less copiously branched, the ultimate branchlets 

 forming more or less characteristic tufts, and curved toward the main 

 axis: one to three of the lower cells usually producing a corresponding 

 number of secondary perithecia similar to the primary one. Dimen- 

 sions very variable. Perithecia, above basal cells, 95-110X30-40 /x, 

 the perithecial branch 25-120 /x, total length, including branch, 130- 

 250 /x; basal cell-region 20-40X25-30 M- Total length to tip of long- 

 est branchlets (largest) 400 /x. Supporting outgrowths 100-275 /x. 



On abdomen and elytra of Osorius sexpiindatus Bernh., Palermo, 

 No. 1693, and Isla de Santiago, La Plata, No. 1972. Also from the 

 Amazon, (^lann), on a very large Osorius. 



EcTEiNOMYCES Thaxter. 



I have called attention in my second monograph to the uncertain 

 position of this genus, as well as of Ilydrophilomyccs; and also to the 

 similarity between these two and Misgomyces. Although the exami- 

 nation of fresh American material of Misgomyces Dyschirii from 

 Kansas, recently received in moderately good condition, appears to 

 show that this is a distinct genus more nearh- allied to Lahoulhrnia, 

 a further study of forms allied to Ectfinomyccs and Ilydrophiloniyces 

 has forced me to the conclusion that it is inadvisable to retain both 



