164 PROCEEDINGS OF THE AMERICAN ACADEMY 



slightly outwards. Appendages arising from two basal cells, the outer 

 very large almost covering the very small inner one and continued 

 directly to form the usually very large long simple outer appendage, 

 which is septate, slightly constricted at the septa with a marked general 

 constriction usually present towards the base, accompanied by a brown 

 suffusion. The inner basal cell gives rise to a single short branch 

 bearing one or two antheridea. The black insertion cell eventually 

 thrust obliquely outwards by cell (5) free from the perithecium. Re- 

 ceptacle sometimes short, more often very long through the elongation 

 of cell (2), the distal portion reduced, usually blackish brown, while 

 the two basal cells are hyaline. Perithecia 135-160 X 50 n. Outer 

 appendage, longest 1065 /x; average 725 fj,. Total length to tip of 

 perithecium 220-480 n; average 375 fx. 



On Anophthahnus Menetriesii Motsch., and A. angustatus Lee, in 

 limestone caves, Kentucky. On A. 3fotschuhhyi Schm., Carniolia. 



A peculiar and variable species. Forms occurring on the jaws of 

 the host (a blind cave beetle) are short and compact, while others, 

 especially those occurring on the lower surface of the. abdomen, are 

 very elongate. The European specimens are small and rather slen- 

 der, but can hardly be separated from the American form. A second 

 species of Laboulbenia allied to L. luxurians occurs on Anopthalmi 

 from caves in Illinois, but the material is hardly sufficient to warrant 

 its description. 



Laboulbenia Catoscopi, nov. sp. 



Pale brownish yellow becoming suffused with olive-brown at the 

 base of the perithecium and in the region of cell (3). Perithecium 

 moderate, the apex rather prominent, blackened except about the pore, 

 the blackening continued downwards externally to the body of the 

 perithecium. Outer appendage single simple nearly straight, exceed- 

 ing the perithecium ; its basal cell very large, outwardly inflated and 

 blackened. Inner appendage consisting of a much smaller basal cell, 

 from which arise directly from two to six branches which may be once 

 or twice successively branched ; the antheridia solitary. Receptacle 

 rather elongate, normal, cell (4) projecting outwards beyond the rather 

 thick black insertion cell, which is situated between the two lower 

 thirds of the perithecium. Spores 65 X 5 /x. Perithecia 100-130 X 

 37 ^. Appendages (longest observed) 110-130 /*. Total length to 

 tip of perithecia 250-320 fi. 



On the abdomen of Oatoscopus guatemalensis Bates, Mexico. 



Belonging to the flagellata group, in which it is at once distin- 



