MONOGRAPH OF THE LABOULBENIACEtE. 



361 



opaque, more or less rigid, hyaline-tipped, those surrounding the base of the perithelium hardly 

 equalling it in length, a few lower on the receptacle exceeding its apex by the whole length of 

 the plant; of the shorter median appendages some are terminated by a peculiarly modified, 

 partly hyaline anthcridial cell, the neck-like tip of which curves strongly outward, terminat- 

 ing bluntly. Perithccia, 90 x 37 yu,. Receptacle about 110 (when not proliferous). Longest 

 appendages, 300 fi. Total length to tip of perithecium, 185 (a to 260 /j, (in proliferous forms). 

 On Anophthalmus pusio Horn, West Virginia. 



The smallest species of the genus, more nearly allied to R. lasiophorus in the form of its 

 perithecium and the disposition of its appendages around the base of the latter, but differing in 

 its slender form, longer and more slender appendages and irregularly constricted receptacle. A 

 small number of specimens were found growing near the tips of the elytra of its host, a blind 

 cave beetle. The curved cells borne on short branches (fig. 25) are conspicuous in some speci- 

 mens, and are undoubtedly antheridia. 



Rhachomyces longissimus Thaxter. Plate XII, fig. 4-5. 



Proc. Am. Acad. Arts and Sci. Vol. XXX, p. 467 ; Acanthomyces longissimus Thaxter 1. c. Vol. XXVIII, p. 176. 



Perithecium brown, darker at the blunt apex, slightly inflated, its two lower thirds almost 

 completely surrounded by a series of appendages arising from its base. Receptacle very long 

 and slender, slightly flexuous, its main axis consisting of about thirty superposed cells deeply 

 suffused with blackish brown, lighter at the septa. Appendages very numerous, externally 

 opaque, internally more or less hyaline, short, slender, straight, appressed ; a few curved, project- 

 ing outward on either side in successive pairs. Spores, 60 x 4 /x. Perithecia, 185 x 55 fx,. 

 Appendages about 110 /jl long, those at the base of the perithecium about 165 p. Receptacle 

 slightly exceeding a millimeter in length by 30 /* broad. 



On Colpodes evanescens Bates, Guatemala. 



One of the largest of all the Laboulbeniaceas found on the elytra of a small Colpodes in the 

 collection of the Museum at Cambridge. Apart from its great size it is readily distinguished by 

 the curious disposition in pairs of certain of its slender appendages. 



Rhachomyces hypog^eus Thaxter. Plate XII, fig. 6. 



Proc. Am. Acad. Arts and Sci. Vol. XXX, p. 467. Acanthomyces hypoqeeus Thaxter 1. c. Vol. XXVIII, p. 177. 



Perithecium nearly sessile, terminal, pale straw-colored, hardly inflated, continuing the sig- 

 moid curve of the receptacle, its blunt apex exceeding the tips of the appendages by about half its 

 length. Receptacle uniformly pale straw-colored, bent in a sigmoid curve, the base slender, the 

 remaining portion stout, the main axis consisting of about eighteen superposed cells with very 

 oblique septa, the appendiculate cells unusually large, their bases externally distinct. Append- 

 ages numerous, closely set, appressed, slightly curved inward, deep brown, the tips paler. Peri- 

 thecium, 145 x 37 p. Appendages, 110-150^. Receptacle, 340 x 37^. 



On Anophthalmus Bilimeki Sturm., Carniolia, Austria. 



