MOXOGRArn OF THE LABOULI3EXIACE.E. 321 
o 
ward by cell J free from the pcrithccium. Receptacle sometimes short, more often very Ion 
through the elongation of cell IT, the dislal portion reduced, usually blackish brown, wiiilc tlic 
tu'o basal cells are hyaline, rcritliecia, 135-100x50^. Outer appcndnge, longest, 10G5^; 
average, 725 fi. Total length to tip of pcrithecium, 220-480 fi ; average, ^75 ^. 
On AnopMJialmus 3Icnetriesu ^loisch., In limestone caves, Kentucky ; A. fusio ITorn, TTest 
Virginia. On A. 3IotschuUhyi Schm., Carniola, Austria. 
A peculiar and variable species. Forms occurring on the jaws of the host (a blind cnvo 
beetle) are short and compact, while others, especially those occurring on the lower srirface of 
the abdomen, are very elongate, The European specimens are small and rather slender, but can 
hardly be separated from the American material. . - 
Laboulbenta PEBPENDicuLARis uov. sp. Platc XITI, figs. 15-18. 
L. truncala pro parte: Troc. Am. Acad. Arts and Sci. Vol. XXVII, p. 45. 
Hyaline, becoming more or l6ss suffn^od with olive brown. Peril hccium brown, slighlly 
inflated toward the base, the distal portion often long and narrow, the iip bent inward, it.s ap<!.K 
broad and flat Outer appendage rigid, irregular ; its basal cell long, followed by two cells, the 
upper smaller, often inflated, usually followed by a single cell, which bears terminally two rather 
short branches; inner appendage consisting of a rather large basal cell, the whole inner face of 
which is occupied by the bases of two long branches set one above the other, projecting across 
and beyond the perithecium at right angles to the outer appendage ; one or both once branched 
near their tips and bearing a single antheridium from their basal cells. Receptacle distally 
rather abruptly expanded in the region of cell VI, becoming brownish, the darker distal portions 
sometimes obscurely punctate. Ppores, 65-78 x 5/i. Perithecia, 120-150 X 45-50^. Append- 
ages, outer (longest), 370-400 yit; inner, longest, 350-450. Total length to tip of perithecium, 
250-330 /t. 
On undetermined species of Bcmbidium, Connecticut, Virginia (Pergande), Washington 
Qliss Parker). 
This species was at first considered a more fully developed type of I. truncafa, which is 
undoubtedly its nearest ally. The differences indicated by the above description seem, however, 
sufficiently constant to separate it without difficulty, although it is barely possible that X. triin- 
cata may be the same species greatly modified by its position of growth. The peculiar mode of 
development by which its inner appendage is made to cross the perithecium at right angles is 
quite unique. The outer appendage is almost invariably broken off above its third cell, as 
shown in fig. 15 ; and the branches of the inner appendage are rarely perfect. But one of these 
branches (the upper) usually produces its single antheridium, the second, as well as all the por- 
tion of the first above the antheridium, being developed after fertilization. Fig. 10 represents 
the single inner appendage shortly before fertilization has been effected, the short terminal 
unicellular branch at the right subsequently growing into the elongate appendage shown in fig. 
15. There is some variation in the form of the perithecium, which may be more distinctly nar- 
row toward its extremity, and the latter may be more strongly bent inward than is shown by 
(fi"-. 15). The species has been observed only on or at the base of the 
anterior pair of legs. 
21 
