Til A XT KR. 



MONOGRAPH OF TII10 LAW) I UiKM ACK.L. 



437 



fiisus; the perithecial appendage erect, short and stout, consisting of about ten cells, distally curved out- 

 ward, tapering from its broad base to the bluntly pointed tip. Appendages (broken) and receptacle, much 

 as in Q. cotifusus. Pcrithccium 800-850 X 05 /«, its appendage 125 /<. Total length to tip of pcritliechim 

 more than one millimeter. 



On the inferior surface of the abdomen (near the middle) of Tropisternus sp. San Fidelio, Brazil. 

 Museum of Comparative Zoology, Cambridge, No. 133X. 



This species is remarkable for its great length and large size, the number of cells in each cell-row of 

 the pcrithccium being greater than in any other species. In general habit it resembles C. fiUformis but 

 differs in possessing a perithecial appendage. 



Ceratomyces curvatus Thaxter. Plate LXIX, fig. 1. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVII, p. 43. June, 1901. 



Amber-brown. Perithecium relatively large, inflated toward the base; the distal half up to the 

 perithecial appendage of about equal diameter throughout; about forty cells, more or less, in each row of 

 wall-cells; the configuration at the tip very similar to that in C. confusus, the tip itself more prominent, the 

 apex more pointed; the perithecial appendage about nine-celled, the distal half pale, curved or recurved, 

 broader below, shorter and stouter. Receptacle much as in C. confusus, the basal cell black, the further 

 suffusion somewhat less extensive. Appendage consisting of about six or seven cells, tapering distally, 

 rather short. Spores about 70 X 4 /i. Perithecia 500-G15 X 75 \i (below) X 00 u (distally), the append- 

 age 150 ji. Total length to tip of perithecium 000-700 ft, to tip of antheridial appendage about 250 ft. 



On Tropisternus Caracinus N. on inferior surface of abdomen near the tip. Caracas? Berlin 

 Museum, No. 1057. 



Although one of the very largest of the genus, this species is not distinguished by any very striking 

 peculiarities. The perithecial appendage is of an unusual form and the perithecium itself is enormous. 

 It appears to be allied to C. procerus and C. confusus. 



Ceratomyces cladophorus Thaxter. Plate LXIX, fig. 2. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 444. April, 1900. 



Perithecium very large with a slightly sigmoid curvature, the lower half conspicuously inflated above 

 the rather narrow base, the outer margin of the inflated portion strongly convex, the inner slightly concave; 

 the distal half or third more nearly isodiametric, bulging subterminally on the inner side, the margin curv- 

 ing thence abruptly outward to the short broad beak-like tip; the apex sometimes apiculate; about the 

 fortieth cell of the outer row of wall-cells forming the base of a subterminal appendage which is curved 

 upward, geniculate at its base, rather long slender and tapering, amber-brown becoming blackish below; 

 the perithecium at first pale yellowish, the inflated portion becoming rich amber-brown, the distal portion 

 much paler except in the region of the more deeply suffused subterminal elevation on the inner side. 

 The narrowed base nearly hyaline, not differentiated from the receptacle. Receptacle consisting of three 

 superposed cells, short, narrow below, abruptly very broad above; the foot relatively small, the basal cell 

 small, at first hyaline, later becoming tinged with smoky brown; the two distal cells relatively very small 

 and broadly blackened except along the nearly hyaline anterior margin, the opaque area extending obliquely 

 so as to involve the geniculate base of the appendage. Appendage relatively very large and stout, tapering 

 in very young individuals to a slender apex and consisting of from fifteen to twenty superposed cells, 

 many of which may be once longitudinally divided, a subtriangular appendiculate cell being separated 

 from the inner side, or also from the outer distally; the branches numerous, with very long and slender 

 branchlets which may be several times branched. Spores 95 X 4 u. Perithecia 475-550 X 90-110 (in- 

 flated portion) X 70 u (distal portion). Receptacle including foot 85 ft. Total length to tip of perithe- 

 cium (longest) 635 u. Appendage 275-475 X 45 u, its longest branches 550 X 3 u. 



On Tropisternus nimbatus Say. Eustis, Florida. On the inferior surface of the thorax on the left 



side. 



