MONOGRAM OF THE LABOULBENIACEiE. 



319 



Laboulbenia pedicillata Thaxter. Plate XIII, figs. 4-8. 



Proc. Am. Acad. Arts and Sci. Vol. XXVII, p. 44. 



Hyaline, becoming more or less deeply suffused with brown. Perithccium inwardly inflated, 

 often with a median external prominence ; distally sub-conical, the tip somewhat pointed, nearly 

 symmetrical. Appendages somewhat exceeding the perithecium ; usually curved toward it ; 

 arising from two basal cells, the outer twice as large as the inner, giving rise to a branch on its 

 inner upper side and followed above by a roundish cell, its lower septum blackish, from which 

 are produced often two to five branches, which may be one to three times sub-dichotomously 

 branched ; the branches curved, often slightly circinate at the apex ; the inner basal cell giving 

 rise to a variable number of short branches, curved toward the perithecium. Basal and sub- 

 basal cells of the receptacle forming an often very elongate stalk, abruptly distinguished from 

 the distal portion ; cells IV and V nearly equal. Spores, 50 x 3.5 //.. Perithecia, 90-95 x 36- 

 40 p. Appendages, 90-150 //, (longer). Total length to 'tip of perithecium, 180-300 /x. 



On various species of Bembidium, Maine to Virginia, Washington. 



This species, although so distinct in its typical form, approaches L. vulgaris in some cases, 

 from which, as above distinguished, it seems, however, quite distinct. The production of two 

 branches from its outer basal cell, the much lower position of its insertion-cell, its pointed peri- 

 thecium, as well as the character of cells IV and V, which are nearly equal and separated by an 

 almost vertical septum, serve to define it. It may be mentioned that although some of 

 Peyritsch's figures of L. vulgaris bear a certain resemblance to this species, none of them have 

 the character just mentioned. The species varies considerably in the luxuriance of its append- 

 ages and in the length of its stalk-cell, specimens occurring at the base of the legs being com- 

 monly the largest. It is not uncommon on various Bembidia at the margins of ponds and streams. 



Laboulbenia Casnonle Thaxter. Plate XIII, figs. 22-23. 



Proc. Am. Acad. Arts and Sci. Vol. XXIV, p. 266. 



Pale olivaceous, becoming olive brown. Perithecium rather small and narrow, slightly 

 inflated, the lip-cells prominent, bent slightly outward, the pore external. Appendages hyaline, 

 the outer especially becoming deep olive brown externally at and toward its base ; arising from 

 a larger outer and smaller inner basal cell ; the outer appendage simple, tapering, rather closely 

 septate, constricted at its lower septa, about twice as long as the perithecium ; the inner basal 

 cell gives rise to two, perhaps more, branches, short branched and bearing single antheridia 

 laterally. Receptacle normal, cell II large, the rest small ; becoming more or less suffused with 

 brown, the distal portion coarsely, though not very distinctly, punctate in the regions most 

 darkly colored. Spores, 35-40 x4 p. Perithecia, 75 x 30 Appendages, outer (larger), 170 

 Total length to tip of perithecium, 160-200 fi. 



On Casnonia pennsylvanica Linn., Connecticut and Tennesee. 



About two dozen specimens of this somewhat insignificant, though rare, species, have been 

 examined, and seem to be quite constant in their essential characters. Its simple outer append- 

 age seems invariable, and although it might perhaps be confused with some of the varieties of 



