424 



THAXTER. — MONOGRAPH OF THE LABOULBENIACE^E. 



Rhachomyces furcatus Thaxter. 

 Specimens of this species, which is well marked by its long appendages and the considerable extension 

 of its axis beyond the base of the perithecial stalk-cell, have been found as follows: Hope Collection, No. 

 221, on Othius fulgidus, no locality: in the British Museum, No. 382 on O. fulviprnnis- Fabr., France; 

 No. 428 on O. melanocephalus Grav., Europe and on O. fulvipennis Fabr. in the Berlin Museum (imma- 

 ture). In addition to these single specimens of a somewhat paler and more slender variety were found on 

 O. myrmecophilus Kies. from Tilgate, England, in the British Museum, No. 440, and in the Berlin Mu- 

 seum, No. 812, on 0. melanocephalus Grav., from England. This form, however, does not seem separable 

 from the type which is clearly defined and appears to be confined to Europe. 



Rhachomyces Cryptobianus Thaxter. Plate XLV, fig. 15. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 437. April, 1900. 



Perithecium hyaline or pale straw-colored, very long and slender, nearly isodiametric throughout, 

 almost straight, the tip apparently blunt and not well differentiated. The main axis of the receptacle 

 consists of about sixteen cells; the basal cell and those immediately above it slender black and opaque; 

 the rest becoming larger upward, hyaline suffused or mottled with reddish brown. Appendages numer- 

 ous, slightly divergent, becoming longer from the base upward, nearly opaque except along the inner 

 margin and at the tip which is generally bent abruptly outward, a group of about six below the base of 

 the perithecium much longer than the rest and curved outward in a tuft, those arising about the base of 

 the perithecium very elongate, erect, with straight blunt tips, reaching nearly to the apex of the perithecium. 

 Perithecium 490-450 X (about) 35 fi. Receptacle 275-430 /x. Total length to tip of perithecium 650- 

 800 ft. Longest appendages 300-430 u. 



On Cryptobium capitatum, Paris Museum, No. 172. Brazil. 



A fine species remarkable for its long slender perithecium and the characteristic dispositon of its 

 appendages near the base of the latter. 



Rhachomyces Oedichiri Thaxter. Plate XLV, figs. 8-9. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVII, p. 38. June, 1901. 



Receptacle strongly curved, rather short, the lower cells especially more or less suffused with clear 

 brown, the basal cell slender, the cells of the main axis above it successively larger, about ten to twelve 

 in all. Appendage hardly ever reaching to the tip of the perithecium; the shorter margin alone subulate 

 and straight, the rest appressed, denser toward the base of the perithecium, where they form a tuft which 

 does not wholly surround it, curved slightly outward, somewhat attenuated; tips abruptly recurved or 

 subhelicoid. Perithecium somewhat inflated with a more or less evident submedian ridge, hyaline, with 

 the exception of several longitudinal dark brown marks at the tip, the base concealed by the appendages. 

 Spores 36 X 4 /z. Perithecia 90-110 X 30-35 ;x. Total length to tip of perithecium 220-250 //. Long- 

 est appendages about 90 (i. 



On Oedichirus nov. sp. Rio de Janeiro, Brazil. Sharp Collection, No. 1154. 



This pretty species is distinguished by its short stout curved form; absolutely hyaline perithecium, 

 with small subterminal brown patches; and characteristic appendages, which are mostly similar, gradually 

 longer from below upward and abruptly recurved at the tips, forming a little hook. The species is very 

 constant in its characters, and appears to be most nearly related to R. Philonlhinus. The host is a staphy- 

 linid supposed to be a new species, and is allied to Pinophilus. 



Rhachomyces Philonthinus Thaxter. Plate XLIV, figs. 3-4. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 435. April, 1900. 



Perithecia borne on a short broad hardly visible stalk-cell, reddish brown, inflated toward the base, 

 conical above, straight and nearly symmetrical, the tip blunt, undifferentiated, symmetrical. Main axis 

 of the receptacle distinct, consisting of about twenty cells, the "stigmatal" markings usually conspicuous 



