MONOGRAPH OF THE LABOULBENIACE^E. 



291 



Chitonomyces uncinatus Thaxter. Plate XXVI, fig. 23-24. 



Heimatomyces uncinatus: Proc. Am Acad. Arts and Sci. Vol. XXVII, p. 33. 



Evenly suffused with pale amber-brown. Peritbecium large, curving evenly inward to the 

 somewhat pointed apex. Basal cells of the receptacle ratber slender, the terminal cell pushed 

 to one side and bent past the apex of the peritbecium by a somewhat indurated, blunt outgrowth 

 from the sub-terminal cell, the tip of which it nearly equals. Perithccia, 75-85 x 20 Total 

 length, 110-130 /x. Basal cells of receptacle, 37 (a. 



On Laccophilus maculosus Germ., and Hydroporus spurius Lee, Connecticut. 



A rather rare species, occurring in groups on the inferior surface of the abdomen of its host, 

 and distinguished by the peculiar development of the sub-terminal cell of the receptacle, which 

 gives its extremity a somewhat booked appearance. 



Chitonomyces apfinis Thaxter. Plate XXVI, figs. 12-14; Plate VIII, figs. 29-30. 



Heimatomyces affinis : Proc. Am. Acad. Arts and Sci. Vol. XXVII, p. 31. 



Rather sti'ongly suffused with amber-brown. Perithecium commonly slightly curved inward, 

 or nearly straight, the tip often slightly bent outward. Basal cell of receptacle large, sub-tri- 

 angular, suffused laterally and terminally with deep black-brown : sub-basal cell very flat ; 

 terminal cell small, its axis bent strongly inward. Spores, 50-55 x 3 /z. Peritbecia, 100-110 x 

 30 p. Basal and sub-basal cells of receptacle, 40-45 \i. Total length to tip of perithecium, 

 150-170 fi. 



On Laccophilus maculosus Germ., and Hydroporus sp., Connecticut. 



This species occurs near the margin of the right elytron toward its tip, and is distinguished 

 from other species of the more simple forms by its large, blackened basal cell and the position 

 of the terminal cell of the receptacle, which is bent against the perithecium on the left side, and 

 is partly concealed by it when viewed from the right. It is one of the commonest species, and 

 is easily detected from its dark color. 



Chitonomyces hyalinus Thaxter. Plate XXVI, figs. 10-11. 



Heimatomyces hyalinus: Proc. Am. Acad. Arts and Sci. Vol. XXVII, p. 31. 



Hyaline or very faintly tinged with yellowish brown. Perithecium large ; at first hunched 

 externally and bent inward near the apex ; at maturity becoming nearly straight, tapering 

 slightly to the rather narrow apex, which is bent somewhat abruptly outward ; one or two 

 oblique ridges more or less distinct below the apex on the inner margin, the walls of the cells 

 composing the outer margin greatly and often very abruptly thickened below the tip. Basal 

 portion of the receptacle rather short and stout, the two lower cells nearly equal. Spores, 30 x 

 2.5 fi. Perithecia, 75-90 x 20 Total length to tip of perithecium, 110-120 p. 



On Laccophilus maculosus Germ., Connecticut. 



This species, although it possesses few striking characteristics, is yet quite distinct from any 

 of the others, its chief peculiarity consisting in the fact that the walls of the cells composing the 



