320 



MONOGRAPH OF THE LABOULBENTACE^E. 



L. polyphaga, it seems decidedly distinct from this species as well as from any of the varieties 

 of L. elongata. It occurs at the apex of the elytra of its host. 



Laboulbenia Nebri^e Peyritsch. Plate XIII, figs. 19-21. 



Peyritsch, Sitz. d. Wien. Acad. LXIV, p. 455, Plate II, figs. 4-8 ; 1. c. LXVHI, p. 249, Plate III, fig. 29 ; Sorokin, Veg. Par. 



Vol. II, I.e. 417, Plate XXXII, fig. 772; Wiuter, l'ilze Deutsch. p. 922 ; Berlese Malpighia, III, p. 57 ; Saccardo Syl- 

 loge, Vol. VIII, p. 912 ; Thaxter, Proc. Am. Acad. Arts and Sci. Vol. XXVII, p. 45. 



Becoming suffused with blackish brown, the perithecium and distal portion of the receptacle 

 eventually quite opaque. Perithecium short and stout ; its tip bent outward, the lip-cells with 

 hyaline margins, not very prominently distinguished ; the pore external. Appendages arising 

 from an outer and much smaller inner basal cell ; the outer simple, slender, distally attenuated, 

 rather remotely septate, somewhat rigid, becoming brown but not opaque: the inner basal cell 

 gives rise to one or two branches, short, bearing one or two antheridia or producing one or two 

 long sterile branches : the insertion cell above the middle of the perithecium. Receptacle nor- 

 mal, the basal and sub-basal cells forming a more or less, often elongate, stalk-like base, expand- 

 ing rather abruptly below the terminal opaque portion of the receptacle ; both becoming 

 brownish, but not opaque, the basal cell often tapering below. Spores, 75 X 7.5 /x. Perithecia, 

 118-166 x 44-66 fx. Average, 55 x 150 \x. Appendages, longest, 370-550 /x. Total length to 

 tip of perithecium, 260-555 /x. Average, 310 x 92 fx. 



On Nebria brunnea Duft., and JV. Villce Dej., Europe. On IV. palllpes Say, Nova Scotia to 

 Virginia. On N. Sahlbergi Fisch, Washington, and N. gregaria Fisch, Aleutian islands. 



This well-marked species was found in great abundance in the vicinity of New Haven, often 

 almost completely covering the host with a thick fur. It is subject to considerable variation in 

 size ; but is otherwise quite constant in its essential characters, and is readily distinguished by 

 the opacity of its perithecium and the broad distal portion of its receptacle, the distal cells of 

 which become wholly indistinguishable ; the high position of its insertion-cell, its single rigid outer 

 appendage, etc. When crushed the blackened portions are seen to be very coarsely punctate. 

 The host occurs under stones along shady brooks, and the parasite is found in the best condition 

 in June and early September. According to Peyritsch this species was first noticed by Mayhr 

 (1852), who considered it a pathological chitinous production. 



Laboulbenia subterranea Thaxter. Plate XIII, figs. 9-11. 



Proc. Am. Acad. Arts and Sci. Vol. XXVIII, p. 163. 



More or less suffused with brown, or with two basal cells quite hyaline. Perithecium long, 

 slightly inflated at the base, tapering more or less evenly to the large, blunt, sub-cylindrical 

 apex, the lips of which are turned slightly outward. Appendages arising from two basal cells, 

 the outer very large, almost covering the very small inner one, and continued directly to form 

 the usually very large, long, simple outer appendage, which is septate, slightly constricted at the 

 septa with a marked general constriction usually present towards the base, accompanied by a 

 brown suffusion involving one or more cells. The inner basal cell gives rise to a single short 

 branch bearing one or two antheridia. The black insertion-cell eventually thrust obliquely out- 



