358 



THAXTER. — MONOGRAPH OF THE LABOULBENIACE^E. 



and often a second subterminally on the inner side, the branches simple or once branched, subhyaline; 

 the inner appendage consisting of a basal cell half as large as that of the outer, bearing one to three simple 

 or once divided branches on either side: the branches of both appendages subhyaline, mostly thin-walled, 

 erect in a compact small tuft, tapering slightly, extending but slightly above the tip of the perithecium 

 Perithecium 190-225 X 34 fi. Total length to tip of perithecium 540-680 X G5 fi; to insertion-cell 375- 

 470 ;i. Appendages 175-200 fi. 



On elytra of Ega sp., Paris Mus. No. 151, Acapulco, Mexico. On Er/a Sallei Chev., Brit. Mus. 

 No. 705, Biologia Coll., Paso Antonio and Champerico, Guatemala. 



A slender pale species which varies in the development of its appendages, the basal cells of which are 

 variably proliferous; the outer, which is characteristically inflated, bearing from one to three branches, 

 one of which may obscure those of the inner basal cell, as in fig. 12, from which one to two branches may 

 arise on either side. It does not appear to be nearly related to any of the described species, but is per- 

 haps as nearly allied to L. Philonthi as to any other. 



Laboulbenia Columbiana Thaxter. Plate LVI, figs. 6-7. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 30. June, 1902. 



Uniform amber-yellow. Perithecium straight, free, converging abruptly from the base toward the 

 appendages at an angle of about 45°, slightly and nearly symmetrically inflated, the tip relatively broad, 

 with darker subterminal suffusions; the lip-cells somewhat spreading, the posterior and two lateral ones 

 forming distinct ear-like lateral horizontal prolongations. Receptacle normal, tapering to the pointed 

 foot, the basal and subbasal cells relatively large, the latter largest, cells IV and VI subequal ; cell V 

 separated obliquely from cell III, and somewhat longer than cell IV, which is separated by a horizontal 

 septum. Insertion-cell thick, somewhat translucent, purplish. Outer appendage simple, short; the 

 basal cell faintly purplish, more or less abruptly convex externally, separated by a constriction and dark 

 septum from the subbasal cell, which is also distinguished above by a dark septum, basal cell of the inner 

 appendage smaller than that of the outer, bearing a simple short erect branch on either side. Spores 50 

 X 4 ix. Perithecia 20-25 X 90-110 fi. Receptacle 150 X 30 fi. Appendages 40 fi. Total length to 

 tip of perithecium 200-250 fi. 



On bristle-like hairs on the elytra of Anc.honoderus concinnus Reiche, Columbia; Berlin Museum, 

 No. 1023. 



A single specimen, fig. 7, 680 fi long, with a free perithecium curved outward, with only lateral finger- 

 like projections and with appendages 300 fi in length which are otherwise similar to those of the type, 

 was found on the same host; but in the absence of further material it is not possible to determine whether 

 or not it should be considered a mere variety. It is not impossible that the type form on spines owes its 

 short habit and small size to less abundant nutrition, but the two may prove distinct. 



Laboulbenia Philonthi Thaxter. 

 This species appears to be strictly American, and nothing resembling it, except perhaps L. Bledii, 

 occurs on other staphylinids. Additional material has been obtained as follows: British Museum; No. 

 747 on Phikmthus ochromerus Sharp, Vera Cruz; No. 748 on P. occultus Sharp, Guatemala; No. 749 

 on P. incertus Solsk., City of Mexico. Sharp Coll.; No. 1108 on P. acciderus Sharp, Guatemala; No. 114 

 on P. furvu/s Nordm., var. Flohrii Sharp, Mexico; No. 1115 on P. furvus Nordm., California. It has 

 also been obtained on numerous undetermined Philonthi from New England and Florida and is the 

 common species on these hosts in temperate South America. 



Laboulbenia Bledii Thaxter. Plate LVI, figs. 8-10. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 27. June, 1902. 

 Color uniformly pale dirty yellowish. Perithecium more than two thirds free, rather slender, tapering 

 to the tip, which is more or less well distinguished; the lip-cells rather coarse and prominent, with a sub- 



