376 



MONOGRAPH OF THE LABOULBENIACEJE. 



Ceratomyces camptosporus Thaxter. Plate XXIV, figs. 13, 14. 



Proc. Am. Acad. Arts aud Sci. Vol. XXVII, p. 35. 



Pale amber-brown. Peritbechmi strongly curved near the base, rather stout, its cell-rows 

 made up of from thirty-five to forty members which, on the anterior row, are somewhat inflated 

 and constricted at the septa, giving a strongly corrugated outline on this side, the inner margin 

 bent abruptly almost at right angles to the blunt tip, below which, externally, a nearly straight 

 erect perithecial appendage arises, composed of six or more superposed cells, sometimes bearing 

 terminal branchlets. Antheridial appendage consisting of a short curved basal cell, above which 

 it is abruptly expanded, tapering thence to a rather slender tip; the antheridial branchlets 

 terminal, few in number (or wholly broken off). Receptacle very small, consisting of a few 

 superposed cells for the most part black and opaque. Spores slightly swollen, and bent near the 

 apex, long and slender, 110 x 3.5 fi. Perithecia, 275 x 85-90 fi. Receptacle, 90 x 50 



On Tropisternus glaber Hb., Milford, Connecticut ; Arlington, Mass. On T. striolatus Lee, 

 Texas. 



This speeies appears to be very rare, and I have collected it but once since the three types 

 were found at Milford. A specimen on the above-mentioned host from Texas seems to 

 correspond in all essentials, though not in very good condition, and is more rigid in form without 

 the sub-sigmoid habit of the other specimens. The type-form is at once distinguished by the 

 character of its antheridial appendage, the form of its perithecium, and especially by its greatly 

 reduced and almost wholly blackened receptacle and the characteristic irregularity of its 

 spores. It is found along the lower margin of its host, but was attached to the edge of the 

 elytron in the only specimen in which its exact position was noted. 



Ceratomyces filiformis Thaxter. Plate XXIV, figs. 15-17. 



Proc. Am. Acad. Arts and Sci. Vol. XXVIII, p. 187. 



Suffused with dark amber-brown. Receptacle consisting of three superposed cells, the basal 

 one partly blackened, surmounted by two cells which form the origin of the perithecium and 

 antheridial appendage. Perithecium very long and slender, hardly inflated, tapering abruptly 

 and symmetrically to the subtruncate apex, the cell-rows composed of very numerous cells 

 (maximum forty-five). Appendage short, tapering, straight, bearing terminally or sub-terminally 

 one or two slender branches. Spores, 55-60 x3/i. Perithecia, 250-330 x 33-40 fi. Receptacle, 

 35 x 85 fji. Appendage, 90 p. , 



On the edge of the elytra of Tropisternus glaber (Hb.) and T. nimbatus Say, Milford, 

 Connecticut ; Arlington, Mass., and Kittery Point, Maine. 



This species was at first taken for an abnormal form, but sufficient material shows that it is 

 a well-marked species. It occurs near the tip of the elytron on the upper surface, and is with 

 difficulty distinguished from the bristle-like hairs among which it occurs. It is remarkable for 

 the very small number of spores present in the perithecium, which is more commonly almost 

 empty, especially in specimens in which there are the greatest number of wall-cells. It is never 

 found in abundance and seems decidedly rare. 



