TIIAXTIOR. 



— monograph of tiik laboclhkxi aci:.k. 



395 



Brazil, Berlin Museum No. 966 Type; on Galcrita carbonaria Mannerh., Brazil, Berlin Museum No. 

 960: on G. unicolor Amazon, British Museum No. 51G, and No. 517 (Brazil). Usually on the prothora 

 inferior or superior, and head. 



This speeies has been separated from L. 'punctata to which it is very closely allied, and for which it 

 might readily he mistaken, chiefly for the reason that its appendages and antheridia appear to be con- 

 stantly different. The antheridia and their stalk cells are relatively short, the former strongly curved, 

 while in L. punctata they are straight, very long, and home on long stalk-cells. The branches of the outer 

 appendage, which in L. punctata scarcely exceed the tips of the antheridia and are not distinguished by a 

 basal and terminal portion, are distinctly thus distinguished in the present species, in which the three lower 

 septa, only, are suffused; while this is the case with all the septa in L. punctata. The suffusion of the 

 basal cells of the appendages which are indistinguishable from the insertion-cell, the external prominences 

 formed by the basal cell of the outer appendage, and by cell III, give the individuals a peculiar habit 

 unlike that of L. punctata. The material of the two speeies, as well as the sources from which it has been 

 derived, are sufficiently varied to determine the constancy of the differences indicated. In a few individuals 

 cell II of the receptacle is not opaque at maturity, but merely suffused and coarsely punctate. In some 

 individuals the punctation of the perithecium may be almost obsolete, and is very rarely as general as in 

 L. punctata. 



Laboulbenia punctata Thaxter. Plate LXIV, fig. 7. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 197. Dec, 1899. 



Perithecium free, straight, translucent brown, sometimes becoming almost opaque, except the broad 

 short neck formed by the basal wall-cells, which is nearly hyaline and as broad as the ascigerous portion; 

 the lower half or more of the suffused body of the perithecium covered with irregular more or less rounded 

 dark spots, irregularly distributed, the lower larger; the tip rather abruptly distinguished, narrow, black, 

 distally translucent. Receptacle rather short and stout, the basal cell rather narrow and hyaline or 

 yellowish, contrasting; the rest of the receptacle subtriangular and more or less deeply suffused ; cell VI 

 paler, cells III and IV side by side, nearly vertical, deeply suffused, except the upper edge ; cell V relatively 

 large, subhemispherical, becoming opaque; all the suffused cells where not opaque, more or less con- 

 spicuously and rather coarsely punctate. Insertion-cell very broad, black, close beside the base of the 

 perithecial stalk. Outer appendage consisting of a large triangular basal cell externally blackish brown, 

 forming the base of a series of (eight or less) much smaller cells obliquely superposed, which curves toward 

 the perithecium; each cell producing externally a single simple erect branch, rather closely septate, the 

 (usually six) septa dark, constricted, the terminal cell short with rounded apex. The inner appendage 

 consisting of a basal cell giving rise to a series of cells on either side like that of the outer appendage, but 

 shorter, one to three of the lower branches consisting of a single long cell bearing terminally a long slender 

 fiask-shaped brown antheridium. Perithecia 200-220 X 40 u; smaller 130 X 4<S /x (including the neck 

 about 35 /()• Total length to tip of perithecium, average 350 u; to insertion-cell 145 ft; greatest width 

 75 p.. Appendages 110-130 u. 



On Galerita sp., Paris Museum, No. 74, Venezuela, No. 136, "South America." On head of G. palli- 

 ilicomis Reid. (= G. Moritzi Mann.), Columbia, Berlin Museum No. 968. 



The perithecium of this species possesses the same peculiar dirty yellowish coloring, often obscured 

 by brown suffusions, which characterizes that of L. subpunctata, as well as the peculiar irregular coarse 

 punctation which is much less well marked in the last mentioned species. The undifferentiated branches 

 of the appendages, the cells of which are all distinguished by dark septa; the long stalk-cells of the an- 

 theridia, the tips of which nearly reach the tips of the sterile branches; the form and coloration of the 

 basal cells of the appendages, as well as of the receptacle, and to a less extent the broader stalk of the 

 perithecium, are characters which serve to separate the present species from its near ally. 



