THAXTER. — MONOGRAPH OF Till'] LABOULRKNIACK.l-:. 



347 



Laboulbenia Macrotheca Thaxter. 

 Typical specimens of this form were found in the Paris Museum No. 13; on Anisodacli/lus (or 

 Harpalus f ) from Selenga, Siberia. On Harpalus viridiceneus Beau v., Bathurst, N. B. (Dr. Richards). 

 The Siberian and American specimens of this coarse tipped, straw yellow form are identical arid indicate 

 that it is a species of constant characters. 



Lahoulbenia Platyprosopi Thaxter. Plate LV, fig. (i. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 51. June, 1902. 



Uniform transparent pale reddish amber, the cell-walls very thick. Perithecium straight, wholly 

 or nearly free, erect, the margins slightly convex; of nearly equal diameter throughout to the rather 

 abruptly differentiated short erect blackish tip; the hyaline tip-edges outwardly oblique: the base some- 

 times abruptly broader than the ascigerous portion. Cells I-VI of the receptacle not differing very 

 greatly in length, except cell V, which is relatively large; cells III and VI paired; cell IV prominent 

 externally below the thin contrasting distinctly reddish insertion-cell. The appendages quite hyaline, 

 the basal cell of the outer several times larger than that of the inner, and bearing two to four branches in 

 an antero-posterior series; the basal cells of which usually bear each a pair of branchlets in the same 

 plane: the small basal cell of the inner appendage producing a branch on either side bearing branchlets 

 similar to those of the outer appendage; the antheridia crowded on special branchlets, curved hyaline, 

 small and closely appressed. Spores about 55 X 5 «. Perithecia 150-185 X 3(3-45 p. Receptacle 

 150-220 X 60-70 p.. Appendages, longest, 3G0 p. Total length to tip of perithecium, 275-350 p. 



On the elytra and abdomen of Platyprosopus Bcduinus Nordm. ; Berlin Museum, No. 810; Nubia. 



This pale form was found in numbers and in good condition on the large Staphvlinid above men- 

 tioned. Though it possesses no very marked individuality, it is easily distinguished by its relatively short 

 and broad receptacle, cells III and VI of which are almost equal, though cell III may be slightly the 

 longer of the two. The perithecium, which is usually straight and relatively long, is often set on the 

 receptacle a little within the external margin and, as in L. Anaplogenii, the insertion-cell has a charac- 

 teristic red-brown or claret-colored tint. 



Laboulbenia Anchonoderi Thaxter. Plate LV, figs. 10-11. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 156. Dec, 1899. 



Pale amber-yellow, perithecium slightly darker, about two thirds free, the inner lip-cells suffused 

 below with blackish brown, an external prominence involves the upper portion of the subbasal and lower 

 portions of the subterminal wall-cells, forming, in the specimens from A. subceneus, an abruptly defined 

 hunch. Receptacle normal, the basal and subbasal cells usually slender and somewhat darker, the sub- 

 basal more distinctly marked with fine transverse striations which are less distinct on the cells above it. 

 Appendages concolorous, the outer simple (always ?), the inner consisting of a basal cell similar to that 

 of the outer, about twice as long as broad, giving rise on either side to a single branch which may be once 

 branched above its basal cell; all the branches somewhat flexed. Insertion-cell red-brown or purplish, 

 more or less oblique through the upgrowth of cell V. Spores about 45—48 p. Perithecia (larger) 185 X 

 48 p, average 125 X 48 p. Total length to tip of perithecium 275-500 p (longest 535 p). Appendages 

 about 200 p. 



On the elytra of Anchonoderus subceneus Reiche, San Felix, Panama, and A. binotatus Reiche, Guate- 

 mala City, Brit. Mus. (Biologia coll.), Nos. 706 and 707. On .1. paUipes Reich., New Grenada, Berlin 

 Museum No. 1026, var. on A. rugosus Dej., Columbia, Berlin Museum No. 1025. 



Although this species is subject to considerable variation, it is usually easily recognizable by its red- 

 dish to claret-colored insertion-cell, which is carried out free from the perithecium, as a rule, by the en- 

 largement of cell V. The subterminal external, often somewhat angular, hunch of the perithecium is 

 sometimes wholly absent, but is usually well marked. A variety on A. rugosus (Berlin Museum No. 

 1025) has the subbasal cell of the outer appendage suffused with deep red brown. The material on 

 A. subceneus is taken as the type. 



