TIIAXTJOR. 



MONOGRAPH OK TUN LA HOU LBKN I AC K K. 



250 



Cruz; on Pkilonthus oxysporus Sharp, Oaxaca, Mexico. Shurj > Collection, No. 1113, on Belonuchus 

 formosus Sharp Coll. No. 1138, Jalapa, Mexico. 



This species appears to vary to a Conn In which the perithecia are not greatly elongated, hut it is 

 possible that two distinct species are associated in the material examined. The typical form (fig. 2) 

 which may develop four very elongate perithecia is sufficiently distinguished by this character from all 

 others. 



Dichomyces Javanus Thaxter. Plate XXXII, figs. 1-2. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 420. April, 1900. 



Perithecium solitary as long or longer than the receptacle, clear dark reddish brown, translucent, 

 straight or slightly curved, rather slender, of about the same diameter throughout, the tip usually abruptly 

 distinguished, and more or less conspicuously bent to one side, tapering but little to the rather broad 

 blunt undifferentiated apex. Receptacle rather narrow, the basal cell dark red-brown below, nearly 

 hyaline above; the central cell of the lower tier dark red or red-brown, lighter or hyaline at the base; 

 the cells on either side symmetrical, blackish brown, opaque, extending upward so as to partly enclose 

 the base of the second tier, the margins of the two tiers coincident: the second tier composed of from 

 seven to nine cells, hyaline or becoming suffused below with reddish brown, bearing a well defined sharply 

 pointed purplish slightly asymmetrical antheridium, on either side, which is subtended by from one to 

 two typical rather short appendages: the upper tier very similar to the middle, or slightly larger, nearly 

 hyaline, the single perithecium rising to the right of the median appendage, the right half of the tier thus 

 somewhat larger and higher than the left, three typical appendages usually present on either side. Peri- 

 thecia 145 X 26 p. Spores about 36 X 4 fi. Receptacle 120-140 X 50 fi. Total length to tip of 

 perithecium 250-275 fi. 



On the abdomen of Philonthus sp. Java, British Museum, No. 375. 



This small species is well distinguished by its geniculate habit, and the abruptly bent tip of its elongate 

 single perithecium. 



Dichomyces Homalota Thaxter. Plate XXXI, figs. 13-14. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVII, p. 29. June, 1901. 



Form short and stout. Basal cell geniculate, more or less suffused: the lower tier more or less, 

 sometimes wholly, suffused with reddish brown; the margins darker, more or less translucent, without 

 contrasts, the outline somewhat uneven, the transition to the middle tier indicated by a distinct promi- 

 nence: the middle tier consisting of from nine to (rarely) thirteen cells, hyaline or subhyaline, with slight 

 lateral suffusions; the marginal cells ending in a slight hyaline rounded projection, not extending higher 

 than the venters of the somewhat suffused curved antheridia or extending upward nearly to the middle of 

 the perithecium, with black marginal suffusions and usually asymmetrical on the two sides: the upper 

 tier relatively small, the cells subequal, hyaline, asymmetrical, owing to the development of but one peri- 

 thecium; the appendages often equalling, or exceeding the perithecium in length. Perithecium charac- 

 teristically short and stout, inflated below, sometimes oval, tapering somewhat abruptly distally, to the 

 rather broadly truncate, or slightly rounded unmodified apex. Spores 33 X 3 fi. Perithecia 65-75 X 

 25-30 fi. Receptacle 70-90 X 40-55 /i. Total length 125-165 /i. 



On Homalota sordida Marsh. Fresh Pond, Cambridge, and Kittery Pt., Me. 



A species not very frequently met with and first observed by Mr. Bullard. When mature (fig. 14) 

 it is clearly distinguished from other species having a single perithecium by its asymmetrical middle tier, 

 long appendages, and red-brown translucent suffusions, which often extend to the middle cells of the 

 middle tier without involving the septa. The species is further exceptional, like D. Peruvianus, from the 

 numerous appendages developed on the cells of the middle tier. Curiously enough, it is partial to the 

 head and anterior superior portions of its host, where it is most frequently found, although it also occurs 

 on the abdomen. It is probable that it infests more than one species of Homalota, but only a single indi- 

 vidual has been determined. 



