356 



THAXTER. MONOGRAPH OF THE LABOULBENIACEiE. 



of a slightly smaller basal cell hearing a branch on either side, the basal cell of each branch shorter, and 

 giving rise typically to paired branchlets from the basal cells of which the large, long, slender deep red- 

 brown antheridia are produced in pairs. Perithecia 400-760 p. Total length to tip of perithecium, 

 average 550 p; longest over 1 mm.; average breadth 50 p. Appendages, longest 375 n. 



On upper surface of prothorax, at base of elytra and on legs of Camonia sp., Brit. Mus. No. 502, 

 Amazon River. 



A very distinct species, readily recognized by its long large slender dark paired antheridia, its slender 

 coarse tipped perithecium, etc. It does not appear to be very closely allied to any described species, unless 

 perhaps to L. falrata, which occurs on a similar host in Brazil. 



Laboulbenia dentifera Thaxter. Plate LXI, fig. 8. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 34. June, 1902. 



Perithecium relatively large, as long or longer than the receptacle, straight, erect, almost wholly free, 

 rather dark dull brown; the outer margin distally converging rather abruptly in an almost straight line 

 to the apex; one (the right) of the lateral lip-cells prolonged obliquely inward and upward to form a large 

 tooth-like projection. The receptacle relatively short and stout, the basal cell longer, hyaline and con- 

 trasting, except distally, where it is involved in the general uniform dark dirty olive-brown suffusion of 

 the rest of the receptacle, the cells of which are short and broad, punctate, hardly distinguishable. The 

 insertion-cell thick, black, rather narrow, the basal cell of the outer appendage short and stout, bearing 

 distally an inner and an outer branch, the basal cell of the outer bearing two branches, the black con- 

 trasting constricted base, only, of the outer, persisting; the appendages otherwise hyaline, stout, tapering 

 slightly; the basal cell of the inner appendage very small, roundish, bearing a branch on either side with 

 .single antheridia near the base. Perithecium 125 X 32 p, the tooth-like appendage 20 p. Receptacle 

 115 X 55 /i. Appendage 220 p. Total length to tip of perithecium 240 p. 



A single specimen on the margin of the elytra of Notiobia disposita Bates; British Museum No. 678; 

 Chontales, Nicaragua. 



A more careful examination of the type of this species suggests that the very peculiar conformation 

 of the tip of the perithecium may be to some extent abnormal. It is to be hoped that more material may 

 be obtained from which its characters may be more exactly determined. It is hardly possible to say to 

 what species it is most nearly allied. 



Laboulbenia Chiriquensis Thaxter. Plate LVI, fig. 18. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 164. Dec, 1899. 



Perithecium yellowish brown, straight, the inner margin convex, the outer slightly concave, tapering 

 distally to the broad short blackened tip, which is bent abruptly inward almost at right angles. Recep- 

 tacle yellowish brown, deeper in the region of cell III, the basal cell slightly curved, its upper half rather 

 abruptly expanded; a more or less distinct bulge below the perithecium. Outer appendage usually 

 simple, stout, the basal cell of the inner usually much smaller bearing a branch on either side usually once 

 branched above the basal cell ; all the branches stout and constricted at the lower septa. Spores 60 X 4 p. 

 Perithecium 100-125 X 37 p. Total length to tip of perithecium 200-270 p; to insertion-cell 135-160 p. 

 Greatest width 55 p. 



On margin of elytron of Callida scintillans Bates, Brit. Mus. (Biologia Coll.), No. 735, Volcan de 

 Chiriqui, Panama. 



This species is chiefly distinguished by the peculiar conformation of the tip of its free perithecium 

 which is somewhat similar to that seen in L. Loxandri. The two species, however, are otherwise readily 

 distinguishable. 



