290 



MONOGRAM OF THE LABOULBENIACEiE. 



On Laccophilus maculosus and Hydroporus spurius, Connecticut, Maine; Laccophilus sp., 

 Kansas, Barber. 



A form peculiar for the modification of the terminal cells of the receptacle, which makes the 

 perithecium appear as if bordered by a black band. It is found in company with C. paradoxus, 

 and recalls in some respects the preceding species, which is similarly associated on the left 

 elytron of its host. In one instance a few specimens were found on the left posterior leg, but 

 such a position is exceptional. 



Chitonomyces rhyncostoma Thaxter. Plate XXVI, figs. 17-18. 



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



Evenly suffused with dull amber-brown. Perithecium relatively large, the broad extremity 

 abruptly hooked inward, so that the papillate apex becomes lateral and internal ; the external 

 series of wall-cells prominent with conspicuous septa. Basal cell of the receptacle rather short, 

 somewhat inflated ; the sub-basal cell much flattened ; the terminal and sub-terminal cells about 

 equal in length, forming together an outwardly-curved, finger-like projection, exceeding the peri- 

 thecium : a short but rather conspicuous hook-like structure (antheridium ?) arises from the 

 angle between the perithecium and the receptacle on the left side. Spores, 26 x 3 ft. Perithecia, 

 75 x 22^. Total length to tip of perithecium, 100 fi. Basal portion of receptacle, 25-30 ft long. 



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



This species occurs rather rarely on the margin of the right elytron in a position correspond- 

 ing to that occupied by C. paradoxus, but nearer to the middle. The broad hooked apex of 

 the perithecium, coupled with the finger-like development of the distal portion of the receptacle, 

 serve at once to distinguish it from known species. The hook-like projection, which arises near 

 the base of the lower appendages, has already been alluded to in the previous description of the 

 genus, and may be the antheridium. 



Chitonomyces lichanophorus Thaxter. Plate XXVI, figs. 15-16. 



Heimatomyces lichanophorus : Proc. Am. Acad. Arts and Sci. Vol. XXVII, p. 32. 



Hyaline except for the suffused basal cell. Perithecium bent outward at an angle from the 

 basal part of the receptacle, tapering slightly to the papillate apex. Basal cell of receptacle 

 enlarged and greatly elongated, more or less intensely blackened above its hyaline base ; sub- 

 basal cell flat and almost obsolete. Terminal and sub-terminal cells together forming a straight, 

 finger-like projection as long as or longer than the perithecium, on which the appendage is 

 terminal. Spores, 33-37 x 2.5-3 ft. Perithecia, 65-90 x 30 ft. Total length to tip of perithe- 

 cium, 150-180 ft. Basal cell, 90-110 ft. 



On Laccophilus maculosus Germ., Connecticut. 



This species is confined to the median inferior anal plate of its host, and has only been 

 observed upon males. It is not to be confused with any other species, being distinguished by its 

 elongated basal and apical cells, almost black and white color, and papillate divergent perithe- 

 cium. C. rhyncostoma, which has a very similar finger-like prolongation of the terminal portion 

 of its receptacle, is at once separable by the basal cell, and the form of its perithecium. 



