MONOGRAPH OF THE LABOULBENIACE^E. 



331) 



Laboulbenia Panag2ei Thaxtcr. Plate XIX, figs. 17-20. 



I'roc. Am. Acad. Arts aud Sci. Vol. XXVIII, p. 170. 



Pcrithecium becoming wholly suffused with blackish brown, straight, thick-walled, cylindrical 

 or slightly inflated, the apex truncate or slightly oblique outward, the outer lip nearly hyaline. 

 Appendages arising opposite the base of the pcrithecium, consisting of two equally broad basal 

 cells, the inner shorter, bearing each a single cell from which arise from three to five usually 

 simple branches hardly exceeding the pcrithecium, the lower cells usually inflated, the septa 

 blackened, as is the outer wall of the external basal cell. Receptacle normal, cells III and IV 

 blackened externally or wholly, the suffusion becoming general in older individuals, in which 

 the basal cells of the perithecium may become elongated to form a neck-like base free from 

 the insertion-cell of the appendages, which becomes pushed out quite free from the pcrithecium 

 by the elongation of cells IV and V. Perithecia, 100-150 x 35-40 fx. Longer appendages, 250- 

 330 fi. Total length to tip of perithecium, 240-330 /x. 



On elytra and thorax of Panagceus crucigerus Say, and P.fasciatus Say, Southern United 

 States. 



Specimens occurring upon P. crucigerus are decidedly larger and more elongate than those 

 observed upon the smaller species. The form belongs to the group of which L. Graleritce may be 

 taken as the type, in which the lower series of wall-cells tends to form a neck-like base. The 

 inflated cells of the appendages recall those of L. inflata, but the two species are not related. 

 The hosts affected are myrmecophilus Carabidse, inhabiting ants' nests. 



Laboulbenia australiensis. Plate XIX, figs. 13-16. 



Proc. Am. Acad. Arts and Sci. Vol. XX VIII, p. 171. 



Perithecium as in the preceding species, less deeply suffused and supported in older individuals 

 by a more or less neck-like base. Appendages consisting of two closely united basal cells ; 

 the outer much the largest, and giving rise directly to two branches, the outer deeply suffused 

 with olive-brown, the inner once or twice branched, hyaline or with suffused tips. The inner 

 basal cell gives rise to one or two branches, simple or once or twice branched ; the insertion-cell 

 black, thick and rather narrow, placed opposite the base of the perithecium. Receptacle nor- 

 mal, except for the eventually neck-like hyaline base of the perithecium, hyaline, becoming suf- 

 fused with olive-brown, especially in the region of cells II, III, and VI. Spores, 74 x 5.5 /x. 

 Perithecia, 110-148 x 38 fx. Longest appendages, 222^. Total length to tip of perithecium, 

 220-300 ix. 



On elytra of Acrogenys hirsuta McLean, Australia. 



This species appears to be allied to L. Panagcei, although the appendages are very different 

 in character. The available material is not abundant and is in rather poor condition, yet the 

 species seems sufficiently well marked. 



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