290 



THAXTER. 



MONOGRAPH OF THE LABOULBENIACE.'E. 



fied, blunt. Primary receptacle 25 X 3 /x. Secondary receptacle 16 X 13 p. Perithecium 80-90 X 

 16 fi. Spores about 18 X 2 /<. 



On the antenna- of a species of Ana plain allied to A. Dohrinana, collected under stones along the 

 margin of a stream near Caracas, Venezuela, by Dr. A. F. Blakeslee. 



This species is most nearly allied to II. Ectobice and occurs on a related host. The male individual 

 sometimes produces a short branch from the subbasal cell which gives rise to a small secondary receptacle 

 (or perhaps in some individuals to two, through furcation), bearing small tufts of antheridial branches. 

 In the female the perithecia are very regularly and symmetrically paired as shown in fig. 9, the secondary 

 receptacles, in marked contrast to those of H. Ectobia, being less well developed than in any other species. 



Herpomyces forficularis Thaxter. Plate XL, figs. 18-22. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 15. June, 1902. 



Male individual minute, consisting of four superposed cells, the three upper subequal, nearly round, 

 constricted at the septa, the distal one terminated by a short bluntly pointed appendage resembling a 

 minute foot, which is commonly turned to one side by the development laterally from the same cell of a 

 single slender antheridium. Total length 18 X 5 fi. The antheridium about 35 /<. 



Female individual. Primary receptacle consisting of two superposed cells terminated by a single 

 abruptly smaller sterile cell, which is slightly longer than broad and is terminated by a bluntly pointed 

 appendage similar to that of the male, but larger; the subbasal cell much enlarged, somewhat inflated, 

 the fertile branch at once furcate so that two secondary receptacles are formed symmetrically placed on 

 either side of and just below the primary receptacle. Secondary receptacles distinctly yellowish exter- 

 nally, consisting of a nearly horizontal series of about ten sterile cells, very narrow from the great 

 elongation of their transverse axes which are vertical in position, and so arranged as to cover more or 

 less completely the single fertile cell, which is subtriangular and gives rise to a solitary perithecium. 

 Base of the perithecium nearly as broad as the secondary receptacle, forming a short stout neck: 

 perithecium relatively large, the ascigerous portion somewhat longer than the distal part, very slightly 

 inflated, nearly isodiametric, the base of the trichogyne persistent as a rather conspicuous hyaline 

 projection between it and the distal part which is but slightly narrower, hardly tapering, the large 

 lateral cells thick-walled, the rows similar on either side and terminating in large incurved tapering 

 bluntly pointed brownish-yellow unicellular projections, which surmount the perithecium like a pair of 

 mandibles, the inner somewhat shorter and straighter: the short, pointed apex included between their 

 bases and bent slightly inward. Spores about 18 X 2 p.. Perithecia including base 200 X 36 p; the 

 terminal projections, longer, 35 p. Secondary receptacles 35 X 20-35 p. Primary receptacle including 

 sterile terminal cell 20 X 7 p. Total length to tip of perithecium 220-250 p. 



On antennae of a wingless roach, Mauritius (?); Mus. Comp. Zool., No. 1353. 



This curious form is readily distinguished by its perithecium w T hich is relatively long and broad and 

 is terminated by two incurved subequal caliper-like processes on either side of the tip, thus presenting an 

 appearance seen in no other species. It is most nearly allied to H. tricuspidatus, II. Paranensis and 

 II. Nyctobora>, but lacks the third spinous process seen in these species, and is otherwise widely different. 

 In all the specimens examined the secondary receptacles are regularly paired as in fig. 18. 



Herpomyces tricuspidatus Thaxter. Plate XL, figs. 11-17. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 17. June, 1902. 

 Male individual variably developed, the terminal cell rounded, apiculate, but as a rule soon indis- 

 tinguishable through proliferation of the cells below, the simple forms producing few antheridia, although 

 in most instances, through continued successive proliferation, a dense compact more or less appressed tuft 

 is formed. Antheridium long flask-shaped, hardly distinguished from the usually several-celled branchlet 

 which it terminates. Total length to tips of antheridia 75 p. 



Female individual. Primary receptacle small, surmounted by two rounded cells constricted at the 



