MONOGRAPH OF TIIE LABOULBENIACEyE. 



315 



taclc normal, sometimes rather elongate. Spores, 75 x55/*. Perithecia, 125-150 X 10 fi. 

 Appendages (longest), 300 yu. Receptacle, 185-300 /i. Total length to tip of perithecium 

 (largest), 300 ft. 



On Pterostiehus patruelis Dej., Maine and Massachusetts. 



This species may be distinguished by its rigid habit, straight single outer appendage and the 

 blunt, snout-like apex of its perithecium. It is one of the less well marked types of the genus, 

 yet sufficient material from the two localities mentioned indicates that its characters are suffi- 

 ciently defined to warrant its specific separation from other species of the flagellata type. 



Laboulbenia Pterostichi Thaxter. Plate XVI, figs. 18-21. 



Proc. Am. Acad. Arts and Sci. Vol. XXVIII, p. 166. 



Hyaline, becoming more or less, often deeply, suffused with olive brown. Perithecium 

 becoming deeply suffused, the outer margin commonly straight, the apex rather coarse-lipped, 

 the lip cells hyaline about the pore, more or less blackened below. Outer appendage consisting 

 of a large basal cell, above which it is usually two to three times successively dichotomously 

 branched, the ultimate branches long, straight, tinged, especially the outer ones, with reddish 

 brown, the outmost often irregularly branched. Inner appendage consisting of a small basal 

 cell, giving rise to from one to three short branches, bearing one to several fertile branchlets, 

 sometimes also to one or more long sterile branches. Receptacle normal, usually elongate. 

 Spores, 75-80 x 6.5 /i. Perithecium, 130-160 x 48-55 p. Appendages (longest), 725 fi, aver- 

 age, 400-500 ix. 



On Pterostiehus adoxus Say, and P. luetuosus Dej., Maine ; P. mancus Lee, and P. relietus 

 Newm., Southern States. On Anisodactylus nigerrimus Dej., vicinity of Cambridge. 



This species is very closely allied to L. elongata and also to L. polyjrfiaga, of which it may 

 prove to be a mere variety. In some cases, especially in the variety on Anisodactylus, which is 

 very large (about 730 fi to the tip of its perithecium), the inner appendage may be more or less 

 copiously branched. As a rule, however, in the typical form the inner basal cell of the append- 

 age bears two short branches often less well developed than those shown in fig. 18, and bearing 

 a variable number of branchlets which bear the antheridia terminally in pairs (fig. 20), the 

 whole sometimes forming a short, dense tuft, as in L. polyphaga. The species usually grows 

 densely crowded on all parts of the host, including the extremities of the legs, where they do not 

 appear to vary greatly. 



Laboulbenia polyphaga Thaxter. Plate XV, figs. 18-21. 



Proc. Am. Acad. Arts and Sci. Vol. XXVIII, p. 165. 



Perithecium hyaline, becoming more or less deeply tinged with brown, rather narrow, the 

 outer edge nearly straight, with a more or less well marked prominence below the apex ; the tip 

 prominent, rather narrow, bent outward, deep black, hyaline about the pore, with brown shades 

 more or less well marked below the tip and about the lower half. Appendages two, the outer 

 consisting of a large basal cell, which may be continued directly to form a long, simple, straight 



