270 



MONOGRAPH OF THE LABOULBENIACEJS. 



and quite opaque, as is the basal cell of the appendage, except along its inner margin. Anthe- 

 ridium twice as long as broad, slightly convex inwardly and concave outwardly ; its thorn-like 

 appendage sharp, prominent. Spores, 37-40 x3 fx. Perithecia, 130-145 x 05 /x, the stalk-cell 

 45-50 X 38 fi. Receptacle, 45-55 x 15-18 /x. Antheridium, 33 X 19 Total length of appen- 

 dage, 48-55 fx. Total length to tip of perithecium, 240-260 /x. 

 On Bledius ornatus Lee, California. 



This species was found growing on the abdomen of a single specimen of its host, examined 

 in the collection of the Museum of Comparative Zoology. It seems to be sufficiently dis- 

 tinguished from the succeeding species by its olive brown color and very differently shaped peri- 

 thecium. The fourteen type specimens show no variation from the form represented in the 

 plate. 



Haplomyces virginianus Thaxter. Plate V, figs. 7-10. 



Proc. Am. Acad. Arts and Sci. Vol. XXVIII, p. 160. 



Perithecium short, stout, straw-yellow, outwardly inflated, the inner margin nearly straight, 

 the distal portion conical, its apex bluntly pointed; stalk-cell long, nearly cylindrical, distally 

 expanded slightly, the basal cells of perithecium very small, almost obsolete. Basal cell of 

 receptacle large, the distal cell very small, and several times as broad as long, the stalk-cell of 

 the perithecium arising from it, but also connected with the distal portion of the basal cell- 

 Basal cell of antheridial appendage squarish, slightly broader than long, the antheridium 

 rounded, its reticulations coarse, the thorn-like apiculus very fine (about 5 /x long) and abruptly 

 distinguished from its flattened base. Spores, 33 X 3.7 /x. Perithecia, 110-130 x 55-60 /*. 

 Stalk-cell of perithecium, 75-110 X 19-25 \x. Antheridium, 18 fx long, 22-23/u wide. Receptacle, 

 basal cell, 45-50 x 18-19 fx, distal cell about 18.5 X 6 /x. Total length to tip of perithecium, 2J20- 

 275 ix. Total length of appendage, 30-33 /x. 



On Bledius emarginatus Say, Virginia. 



This curious little species was found growing on the abdomen of its host. It is very dis- 

 tinct from either of the remaining forms, and although approaching H. californicus more closely 

 in the shape of its perithecium, is at once distinguished by the great elongation of the latter's 

 stalk-cell, which is associated with a remarkable reduction in the size of its basal cells. The 

 sub-basal cell of the receptacle is so reduced that the stalk-cell of the perithecium appears at 

 first to arise from the basal cell. The antheridial appendage, though almost identical in the 

 other two species, is here distinctly different in form and general appearance. 



Haplomyces texanus Thaxter. Plate V, fiyrs. 5-6a. 

 / 



Proc. Am. Acad. Arts and Sci. Vol. XXVIII, p. 160. 



Perithecia almost symmetrically conical, straw-yellow, tapering to the rather blunt apex ; the 

 stalk-cell nearly hyaline, more than twice as long as broad, more slender at the base ; the basal 

 cells elongate, nearly equal. Receptacle small, the basal cell nearly hyaline ; the distal cell 

 very small, slightly broader than long, sometimes blackened and opaque, the opacity including 

 the lower outer portion of the basal cell of the appendage, the unblackened portion of which, 



