Til A XT 10 R. — MONOGRAPH OF THE LABOULBENIACEiE. 



381 



The type form of this species ((ig. 21) strongly suggests //. SCelophUa, which occurs on the legs of 

 Pluhjnun c.rlrnsicolli.s in New England; but the two species are abundantly distinct. The variety repre- 

 sented in fig. 23 occurred with the normal form on P. cosruleovirens, and was associated with other forms 

 like fig. 22, in which the general habit is slightly different. The figures given are darker than they should 

 appear, the typical form having a somewhat translucent olive tint. 



LaboulbENLA MICROSOMA Thaxter. Plate LX, fig. 12. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 187. Dec, 1899. 



Perithecium free, several times as large as the receptacle, smoky brown darker basal by and distally, 

 the longitudinal septa subhyaline, the outer margin concave, the inner convex; a subterminal external 

 small rounded elevation; the tip very broad, short, almost flat-topped, the outer angle almost a right angle, 

 the inner rounded. Receptacle consisting of a basal cell which is nearly hyaline, above which cells II, 

 III, and VI form an almost transverse row; cell II median, triangular, lying between the other two, the 

 receptacle abruptly expanded in this region; cells III and IV small and flattened: similar in size and 

 shape: cell V relatively large, lying within cells III and IV and extending quite to the base of the latter. 

 Insertion-cell and basal cells of the appendages nearly opaque and indistinguishable from one another, 

 the outer basal cell apparently producing two branches antero-posteriorly; the inner, a branch on either 

 side, all the branches (broken) brown, stiff, erect or slightly divergent. Perithecium 185 X 66 ft. Total 

 length to tip of perithecium 295 to insertion-cell 90 p.; greatest width 05 ft. 



On Serrimargo guttiger Schaum., Brit. Mus. No. 500, Penang, East Indies. At base of posterior 



legs. 



The small rounded distal portion of the receptacle in this species recalls that of L. Formica rum, but 

 the cells are differently arranged. The relative size and arrangement of cells III, IV and V are quite 

 unusual. The appendages are unfortunately badly broken, but appear to be very similar to those of L. 

 Snrimarginis to which species I am inclined to believe it is most nearly allied. A single specimen only 

 has been examined. 



Laboulbenia maculata Thaxter. Plate L1X, figs. 21-22. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 184. Dec, 1899. 



Perithecium free, dark brown becoming nearly opaque, the outer margin more convex than the inner; 

 somewhat constricted at the base, the tip rather abruptly distinguished externally, the margins nearly 

 straight, the inner lips small and prominent, the outer broad, straight, oblique. Receptacle abnormal, 

 cell I short, slender, curved, opaque; cell II nearly hyaline in the middle, brownish above, coarsely spotted 

 with blackish brown below, becoming darker and indistinguishable from cell I at its base; cell VI distally 

 nearly hyaline and narrow, extending down beside cell II nearly if not quite to cell I, its base spotted as 

 in cell II; cell VII (the "secondary stalk-cell") external to it, the margin blackish brown especially dis- 

 tally, extending down beside cell VI to within a short distance of its base where it is similarly punctate 

 towards its base or throughout; cell III narrow, external to the upper two thirds of cell II, punctate 

 below, its distal end close beside the corresponding termination of cell II; the base of cell IV overlapping 

 cell III so that a cross section in this region would cut cells II, III, IV, VI, and VII: distal portion of 

 the receptacle concolorous with the perithecium or somewhat paler. The perithecium bent toward and 

 pa rtly or wholly overlapping the insertion-cell. Appendages directed across the lower half of the peri- 

 thecium, sometimes at right angles; the outer simple, consisting of a long basal cell sometimes slightly 

 inflated, the rest of the appendage brown: the inner appendage consisting of a basal cell less than half 

 as large, which produces two branches one on either side, the basal cells of which are usually curved, 

 somewhat inflated, bearing two branchlets distally; all the branches slender, rather rigid and straight, 

 parallel and closely approximated, tapering slightly. Perithecia 225 X GO (L Total length to tip of 

 perithecium 500 /t; to insertion-cell 375 ft] greatest width 140 ft. Appendages about 200-250 ft. 



