'I'll WTKK. 



— MONOGRAPH OK TIIK LAHOl'IJtKMACIvK. 



287 



Female individual, colorless. Primary receptacle consisting of four superposed cells, the terminal 

 one acuminate; the stibbasal giving rise to a branch which produces a single secondary receptacle, made 

 up of a vertical series of cells, obliquely superposed, and variable in number, giving rise above to a solitary 

 peiithecium. Perithecium erect, bent inward toward the seta on which the individual grows, the asciger- 

 ous portion hardly, or not at all, inflated ; the distal portion curved outward, tapering to the pointed apex, 

 which is subtended on the inner side by a stout, bluntly rounded projection, about as long as the free 

 apex of the perithecium, which extends outward at right angles from its base. Total length to tip of 

 subterminal projection 100-225 /<. Perithecium 150 X 3.3 u, its terminal process 10 X 3.5 u. 



On the antenna! seta? of Platyzosteria ivgrns Scud., Mexico; Scuddcr Collection, No. 1384. 



In the conformation of its perithecial tip this species resembles //. Zanzibar'tinis more nearly than 

 any other species. The perithecial appendage or subterminal process is, however, blunt or even slightly 

 enlarged distally. The host is a large wingless roach, species of which are very common in Florida: 

 but although, through the kindness of Professor Rolfs, 1 have had an opportunity to look over numerous 

 specimens from Miami, I have been unable to discover any parasites on them. 



Herpomyces Zanzibarinus Thaxter. Plate XL, figs. 8-10. 

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



Male individual consisting of four cells, the distal one furnished with a sharp colorless terminal spine 

 and a small blackish subterminal process, both of which become pushed to one side by the development 

 of one, or sometimes two, sessile antheridia; the subterminal cell somewhat larger, sterile, or producing 

 an antheridium laterally. Total length 28 X 6.5 fi. Antheridia 25 ft. 



Female individual colorless. Primary receptacle surmounted by two sterile cells, the upper termi- 

 nated by a sharp spinous process subtended by a blackish process, as in the male: the subbasal cell appar- 

 ency divided at least once, the two, or more, cells producing a fertile branch from which two few-celled, 

 paired, compact secondary receptacles are produced, secondary fertile branches sometimes arising from 

 division, of the subbasal cell; each of which bears a single perithecium, the cells rather irregular, about five 

 or six in number, subhorizontal in position, without characteristic modification. Ascigerous portion of the 

 perithecium relatively stout, inflated on its inner side, almost twice as long as the distal portion, which 

 tapers from it rather abruptly: distal portion curved inward abruptly at the pointed tip, which diverges 

 from an erect blunt unicellular process which subtends it, at an angle of more than 90°. Perithecium, 

 including base, to tip of terminal process, 125 X 28-32 /i; the process 10 u long. The pair of fertile re- 

 ceptacles together about 30-35 X 45 /i broad (horizontally). 



( )n tlie antenna of a large black wingless roach, Zanzibar, Africa; Mus. Comp. Zool., No. 1354. 



This species is most nearly allied to H. Plaiyzostcriw from which it differs in its smaller size, paired 

 habit, and in other structural details. 



Herpomyces arietinus Thaxter. Plate XL, fig. 7. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 14. June, 1902. 



Male individual consisting of four superposed cells, the basal one relatively long, the distal ones bear- 

 ing two to three antheridia. Length about 29 ji. Antheridia about 20 u. 



Female individual hyaline. Primary receptacle surmounted by two sterile cells, the upper terminated 

 by an erect distally mucronate appendage; the subbasal cell, and often one or two cells which may be 

 separated from it above, giving rise each to a branch which becomes immediately furcate; each branch- 

 let producing a secondary receptacle. Secondary receptacles, symmetrically paired or several, each con- 

 sisting of a horizontal series of about twelve or more vertically elongated, subfusiform, more or less 

 curved cells, corresponding to and external to the fertile cell which bears the primary perithecium, the 

 external margin free. Ascigerous portion of the perithecium relatively long, hardly inflated, tapering 

 slightly above, where it passes into the distal portion; which is about half as long, tapers slightly, and 

 is terminated by an incurved, tongue-like, slender, subcylindrical prolongation of the apex on the inner 



