314 



MONOGRAPH OF THE LABOULBENIACEJE. 



Laboulbenia anceps Peyritsch. 



Sitz. tier Wien. Acad. LXVIII, p. 247, Plate I, fig. 7 ; Sorokin, 1. e. p. 416, fig. 758 ; Winter, 1. c. p. 922 ; Berlese, 1. c. p. 56 ; 



Saccardo, 1. c. p. 911 ; Thaxter, 1. c. Vol. XXVIII, p. 176. 



" Light yellowish brown ; pseudoparaphyses in small numbers, bent, about as long as the 

 perithecium and colorless." 



On the legs of Anchomenus viduus Pz., vicinity of Vienna, Austria. 



As in the previous instance, this species cannot be determined from published data. It seems 

 peculiar from the elongation of cell III, but is otherwise without characters which would 

 distinguish it. It may have to be ultimately united with one or both of the preceding species. 



Laboulbenia paupercula Thaxter. Plate XIII, figs. 24-27 ; Plate I, fig. 9. 



Proc. Am. Acad. Arts and Sci. Vol. XXIV, p. 269. 



Becoming more or less deeply suffused with olive brown. Perithecium often irregularly 

 bent, its lip cells prominently distinguished, distally nearly truncate. Appendages arising side 

 by side in a plane at right angles to the usual position, so that there appears to be but one 

 appendage, the larger (outer) usually once branched above its sub-basal cell, the smaller (inner) 

 consisting of a small basal cell bearing usually two short branches more commonly simple, and 

 bearing small groups of antheridia. Receptacle rather small ; hyaline, becoming more or less 

 deeply suffused with brown, except the lower part of the rather large basal cell ; cell V twisted 

 out of its normal position and only visible on one side, as a rule. Spores, 45 x 4.5 \i. Peri- 

 thecia, 100-120 x 40 ft. Appendages, longest, 250-350 /x. Total length to tip of perithecium, 

 160-222 fM. 



On Platynus extensicollis Say, P. ruficornis Lee, P. melanarius Dej.,and Platynus spp. indet., 

 Maine to Virginia. 



This small species appears to be constant in its characters, and is at once separable by the 

 twist which involves the basal and insertion cells of the appendages as well as cells (IV) and (V) 

 of the receptacle, and which would lead one to suppose, at first sight, that the plant had but one 

 appendage, as was stated in the original description. It usually occurs on the thorax of its hosts 

 and on the adjacent bases of the elytra. 



Laboulbenia rigida Thaxter. Plate XV, figs. 16-17. 



Proc. Am. Acad. Arts and Sci. Vol. XXX, p. 475. 



More or less deeply tinged with olive brown. Perithecium becoming almost or quite opaque, 

 somewhat inflated, a slight depression at its base above the more or less bulging terminal portion 

 of the receptacle, its apex stout, snout-like, bent slightly inward. Appendages arising from two 

 basal cells, the outer of which gives rise to a single simple or rarely once branched rigid branch, 

 tapering slightly or nearly cylindrical ; the inner producing two similar somewhat shorter 

 branches almost invariably simple, and bearing near the base solitary sessile antheridia. Recep- 



