346 



THAXTER. MONOGRAPH OF THE LABOULBENIACE^E. 



England, No. 351 (a) on Platynus " loevis Mull.," England; No. 351 (b) P. dorsalis Mull., England; 

 No. 351 (c) on P. dorsalis Mull., Italy. No. 351 (d) on P. obhngus Fab., Italy; No. 313 ? Diorichodorus, 

 "N. H." 



Laboulbenia parvula Thaxter. 

 Specimens apparently belonging to this species were found on Pehnatellus obtusus Bates Brit. Mus. 

 No. G84. Ostuacan, (?), Mexico. 



Laboulbenia T/EN0dem,e Thaxter. Plate LVIII, fig. 13. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 204. Dec, 1899. 



Perithecium nearly free, slightly inflated, clear translucent brown; the tip well differentiated, exter- 

 nally black with an inner inferior hyaline patch, the lips well distinguished hyaline, the inner very promi- 

 nent, rounded, the pore external. Receptacle long and slender through the elongation of cell II, pale 

 dirty yellowish brown or nearly hyaline. Insertion-cell large, free, blackish, slightly narrower than cells 

 IV + V. Appendages concolorous with the receptacle, the outer consisting of a large basal cell which 

 bears distally as a rule two antero-posterior branches; the inner simple, the outer furcate above its basal 

 cell; the branches stout, slightly tapering, elongate, the inner erect, the outer divergent; its branchlets 

 curving upward: the inner appendage consisting of a much smaller basal cell, rounded and bearing one 

 or two short branchlets. Spores about 70 X 5 p. Perithecia 125-155 X 35-50 /i. Total length to tip 

 of perithecium 400-650 p; to insertion-cell 300-400 p. Appendages, longest about GOO p. 



On the elytra and superior prothoraxof Tcenodemasp., Brit. Mus. No. 391 and Sharp Coll. No. 1152 

 on T. cinerea Sharp, Ega, Amazon. 



Thirty individuals of this species which have been examined vary very slightly, and for the most 

 part only in size, the appendages being constant in their characters as represented in fig. 13. The peri- 

 thecium is practically free and almost symmetrically inflated. The tip almost neck-like, the black and 

 hyaline parts sharply contrasting. I was at first inclined to consider this one of the many varieties, per- 

 haps better assembled under one name, which are included in L. flagcllafa and L. Pterostichi; but further 

 comparison leads me to believe that it should be kept distinct. The hosts belong to a remarkable and very 

 beautiful genus of large tree living Staphylinidse inhabiting tropical South America. 



Laboulbenia uncinata Thaxter. Plate LXI, fig. 13. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 208. Dec, 1899. 



Pale yellowish, becoming tinged with pale reddish yellow. Perithecium more than one half free, 

 relatively large, stout, nearly oblong, the black tip recurved externally through the rounded upgrowth 

 of the inner distal portion of the perithecium which makes them almost lateral in position, the right lateral 

 lip-cell often twice as long as the others and more prominently recurved, its projecting portion the branch- 

 lets short, translucent, rounded. Receptacle medium, normal. Appendages normal, rather short, several 

 times branched, the cells rather short stiff, divergent and somewhat tapering. Spores 50 X 3.5 p. Peri- 

 thecium (not including lip-cells) 120 X 62 ft. Total length to tip of perithecium 100-120 p; to insertion- 

 cell 72-92 p. Appendages (longest) 40 p. 



At base of anterior legs of Harpalus ceneus Fabr., Selenga, Siberia, Paris Mus. No. 12, and of Har- 

 palus viridiwncus Beauv., Cape Neddock, Maine, collected by Mr. Charles Bullard. 



This species is well distinguished from L. macrotheca, to which it seems to be more nearly related, 

 by the repeated branching of its short stiff tapering divergent branches, and by the peculiar modification 

 of its lip-cells, which is exactly the same both in the Siberian and American material. The accompanying 

 figure is drawn from specimens obtained by Mr. Bullard from a species of Harpalus the determination 

 of which as given above is not certain. 



