THAXTER. 



MONOGRAPH OF TIIIO LA HOC IJ5 KM AC I 



Labotjlbenia geniculate Thaxter, Piute LXIV, figs. 2-3. 



Proc, Am. Acad. Arts and Sci., Vol. XXXV, i>. 178. Dec, 1809. 



Perithecium free, long and narrow, evenly tinged with translucent olive-brown except the .short 

 somewhat constricted hyaline neck, the tip well distinguished, blackish brown, bent outward, the lips 

 coarse subhyaline oblique outward. Receptacle nearly hyaline, except cell II, and sometimes the upper 

 part of cell I which is suffused with dirty olive-brown and faintly punctate with fine transverse stria-, long 

 and slender, geniculate above cell II. Insertion-cell broad, black, close to base of perithecial neck. Outer 

 appendage consisting of a larger basal suhtriangulnr cell becoming more or less suffused with olive-brown, 

 its outer edge straight, surmounted by a series of five or six obliquely superposed hyaline cells which curves 

 inward toward the perithecium; each cell of the series bearing externally a simple branch consisting of 

 two short faintly brownish basal cells constricted at the blackish septa, and a terminal hyaline tapering 

 portion about twice as long: the inner appendage consisting of a basal cell blackened below, from which 

 arises on either side a series of superposed cells like that of the outer appendage and similarly branched, 

 except that one or two of the lower cells of the series bear antheridia, solitary, on a unicellular stalk. Peri- 

 thecia 200-285 X 37 ft (the neck, 18-20 ft, included). Total length to tip of perithecium 500-670 p; 

 to insertion-cell 275-370 ft; greatest width 55 ft. Spores G5 -70 X 5 ft. Appendages 150 175 ft. 



On Galerita sp., Paris Museum, No. 100, Rosario, Argentine Republic. On left side of inferior 

 prothorax. 



The material of this form is not abundant, but all the specimens examined have the same geniculate 

 habit and show no variations. The species possesses no very striking individual characters except its 

 geniculate habit, which may prove inconstant; yet it does not seem possible to refer it to any of the other 

 described species. It is most closely allied to L. adunca, the distinguishing points of difference in which 

 have already been referred to under that species. 



Labotjlbenia incerta Thaxter. Plate LXIV, fig. 1. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 43. June, 1902. 



Perithecium erect or slightly divergent, evenly suffused with rather pale or rarely darker translucent 

 dirty brown, considerably, often almost symmetrically, inflated, slightly broader below; the basal wall- 

 cells forming a short, often almost obsolete, hyaline stalk; the tip rather abruptly distinguished, usually 

 bent slightly outward, short, stout, wholly suffused with brown, darker below; the apex evenly rounded 

 as a rule; the outer lip-cells curved outward to the external pore, slightly prominent. Receptacle normal, 

 hyaline, or faintly yellowish; the distal portion short and broad; the basal cell relatively short; cells III 

 and IV subequal. The insertion-cell slightly oblique, black, contrasting, the opacity usually involving 

 a part or the whole of the basal cells of the outer and inner appendages. Appendages similar to those of 

 L. perplexa, more compact, with shorter branches; outer appendage consisting of about six to eight 

 obliquely superposed cells, the branches divergent, curved upward; the two cells of the basal part stout, 

 clear brown, constricted at the dark septa, roundish to long-oblong; the distal part rather stout, unicellular, 

 tapering to a blunt apex and seldom reaching beyond the tip of the perithecium; the two branches of 

 the inner appendage similar to the outer, except that the two lowest branches consist of a single cell, its 

 basal septum alone dark and constricted, bearing distally a single rather short, slightly curved brown 

 antheridiuin. Spores 95-100 X 8 //.. Perithecia 185-250 X 60 ft. Receptacle 185-290 X 70-80 a. 

 Appendage 200-250 ft. Total length to tip of perithecium 360-500 ft. 



On the superior and inferior surface of Galerita carbonaria Mannerh., Brazil; Berlin Museum, 

 No. 960. 



This species appears to be allied to L. perplexa, with which it was associated on the same host in 

 company with L. bicolor, L. cornieulata and L. fusiform is. It differs, however, in its short, nearly evenly 

 inflated, evenly semitransparent olive-brown perithecium; which is characterized by a stouter, some- 

 what differently formed, coarse-lipped tip. The receptacle also differs from that of L. perplexa in being 



