356 



MONOGRAPH OF THE LABOULBENIACEiE. 



The species is at once distinguished from any of the others by the curious one-sided bulge of the 

 sub-basal cell of its receptacle, which is of course not visible unless the latter lies sidewise. 

 There is great variability in the length and luxuriance of the appendages, which are usually much 

 broken, and in the length of the stalk-cell of the perithecium, which, in mature specimens, is 

 usually several times as long as the perithecium. The third cell of the receptacle is also very 

 variable in length, sometimes decidedly elongate, more commonly short and stout. 



The species is usually conspicuous and easily seen at the tip of the abdomen of its host, 

 where it more often occurs in small groups, although it may not infrequently be found on the 

 legs and other portions of the insect. The host A. pronus is very common in early summer at 

 the margins of ponds and ditches, hiding in wet moss and rubbish. 



Teratomyces Quedianus nov. sp. Plate X, fig. 8. 



Closely allied to the preceding species. Perithecium larger, sub-cylindrical or very slightly 

 inflated, terminated abruptly by a sub-cylindrical or slightly tapering, bluntly rounded apex. 

 Receptacle elongate, the sub-basal cell long, tapering below and wholly opaque, the blackening 

 involving the base of the cell above it, which is distinctly constricted below the terminal cellular 

 portion. Appendages as in T. mirijicus much shorter and more thickly beset with brown 

 sharply pointed septate branchlets. Spores, 50-5.5 X 4.5 \i. Perithecium, 155 X 30 p. Append- 

 ages, longest 150 fM. Receptacle, 160 - 165 /*. Total length to tip of perithecium, 450 fx,. 



On Quedius ferox Lee, Cambridge, Mass. 



Fourteen individuals of this form were found on a specimen of its host collected in April, 

 among leaves in swampy woods about Fresh Pond. The species, though very close to T. mirijicus, 

 seems constant in its differences, and is easily distinguished by the structure of its receptacle, 

 which lacks the prominence peculiar to the last-mentioned species, as well as by the different 

 form of the tip of its perithecium. But two of the specimens are fully mature, and more 

 abundant material would doubtless show much greater range in size than is indicated by the 

 measurements given above. 



Teratomyces Actobii Thaxter. Plate X, figs. 9-17. 



Proc. Am. Acad. Arts and Sci. Vol. XXIX, p. 98. 



Perithecia one to four, reddish brown, distinctly inflated towards the base, the distal portion 

 symmetrically conical, tapering to a blunt apex ; borne on a single short stalk-cell not exceeding 

 the appendages in length, followed by three rather large basal cells disposed as in T. mirijicus. 

 Receptacle short, nearly symmetrical, tinged with brownish or nearly hyaline, consisting of three 

 superposed cells, the basal small and narrow, the sub-basal squarish, sometimes partly or wholly 

 opaque, the distal large, rounded, and followed by the series of small cells from which arise the 

 numerous appendages which in general resemble those of T. mirijicus, though proportionately 

 stouter and more intricately branched. Spores, 26 x 3.7 p. Perithecia, 120-137 x 37 fi. Stalk- 

 cells, 75-100 fi. Longest appendages, 150 Three basal cells of receptacle, 37 x 22 /x. 



On Actobius nanus Horn., Kittery Point, Maine ; Arlington, Mass. 



