292 



THAXTER. MONOGRAPH OF THE LABOULBENIACEiE. 



Herpomyces NyctoboRjE Thaxter. Plate XXXIX, figs. 5-8. 

 Proc. Am. Acad. Arts and Sci., Vol. XLI, p. 309. July, 1905. 



Hale individual. Axis consisting of five or six cells, the basal somewhat elongate, the rest short 

 and somewhat rounded, the terminal one abruptly apiculate; the distal cells producing branches which 

 in turn branch three to four times, the ultimate branchlets bearing the antheridia terminally in groups, 

 the whole forming a dense tuft. Axis about 54 X 10 \i, the total length to the tips of the antheridia about 

 100 [i. Antheridia 20 X 3 /<. 



Female individual. Colorless, the primary receptacle consisting of four or five cells, the terminal 

 one short and apiculate; the subbasal (perhaps others also?) giving rise to branches which produce a 

 variable number of secondary receptacles arranged with the younger behind the older, as in Paranensis. 

 The secondary receptacles much as in i7. Paranensis, the first formed broadest. Perithecium long and 

 slender, tapering, especially above the middle; the stalk-cells flattened, so that the perithecium is almost 

 sessile on the receptacle; the ascigerous portion often abruptly somewhat narrower than the base, the 

 fourth lateral external wall-cell bearing a long curved attenuated wholly free spine-like cell, which extends 

 just beyond a subterminal short distally incurved sharp spinous process, which subtends, and is nearly 

 twice as long as, the free curved tip of the perithecium: the fourth anterior wall-cell also producing a long 

 curved spinous process, slightly shorter than the lateral one, or more divergent. Secondary receptacles 

 65 X 45-50 fi. Base and stalk-cells of perithecium 30-35 X 15-18 /i, the ascigerous part to tip of longest 

 spine 150-165 ft: width near base 20-25 ft, below lower spine 10-12 /t; external spine 50 /i, terminal spine 



12/£. 



On antennae of Nyctobora latipennis, Texas; Scudder Collection, No. 1383. 



This species is closely allied to H. Paranensis, from which it differs in its more highly developed 

 male individuals, and in the form and structure of its perithecium. The slender tapering habit, and the 

 arrangement of the spines in relation to the tip, being quite different; although the form and arrangement 

 of the secondary receptacles are very similar. 



Herpomyces Paranensis Thaxter. Plate XL, figs. 1-6. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 19. June, 1902. 



Male individual. Terminal cell distally modified to form a long slender flexuous tapering unicellular 

 prolongation extending above the tips of the antheridia which are few in number, terminal on rather long 

 often several-celled branchlets. Total length to tip of terminal prolongation 250 ;i; the prolongation 

 185 \i. Antheridia about 60-70 (i. 



Female individual. Primary receptacle very small, the distal cells rounded, the uppermost pro- 

 longed as in the male. First secondary receptacles developed on either side of the primary, those formed 

 later lying behind them on either side so that the perithecia are more or less clustered (younger ones 

 appearing behind the two primary ones), and each secondary receptacle developing a shield-like structure 

 external to the base of the first fertile cell, like a buttress, the outer and upper margins of which are free, 

 consisting of sterile cells which are greatly elongated vertically and very narrow, similar and successively 

 fewer-celled buttresses being formed behind the primary one in connection with each of the remaining 

 perithecia, of which there may be from four to six or more. Perithecia very similar to those of H. 3- 

 cuspidahis, but with the following differences: the greatly elongated fertile cell of the receptacle extends 

 nearly to the base of the perithecium, the posterior stalk-cell extending downward beside it nearly to its 

 base, covered by the protective shield except at its distal end, which is connected by a narrow isthmus 

 with an abrupt short broad terminal enlargement; the anterior stalk-cell small, short, subtriangular in 

 outline; the base of the perithecium abruptly somewhat broader, its cells protruding more or less dis- 

 tinctly; the ascigerous region thus somewhat clearly distinguished, especially posteriorly, relatively dis- 

 tinctly larger than in //. tricuspidatus somewhat inflated; the conformation of the distal portion 

 similar in general, but the third wall-cell of the anterior row is not modified to form a prominence at the 



