440 



THAXTER. 



MONOGRAPH OF THE LABOULBENIACE^E. 



to differ from its nearest ally, C. confusus, in the different conformation of the papillate apex of its peri- 

 thecium, the tip of which is smaller and less prominent, in the eve n inflation and dark basal suffusion of 

 the perithecial appendage and in the character of its antheridial appendage; but especially in the finger- 

 like protrusion of its receptacle which, although it varies somewhat in length in different individuals, is 

 very characteristic. The species appears to be rather rare, only a very small number of the very numer- 

 ous hosts examined from Eustis being parasitized. Fig. 4 represents the Type from Brazil and fig. 5 

 a specimen from Eustis. 



Cebatomyces Floridanus Thaxter. Plate LXX, fig. 4. 

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



Purplish brown. Perithecium much as in C. confusus, the outer margin nearly straight, the inner 

 somewhat convex, the lateral and posterior rows of wall-cells, about twenty-four in number, rich red-brown 

 with a blackish tinge distally; the anterior wall-cells, about nineteen in number below the perithecial 

 appendage abruptly and evenly paler, yellowish straw-color or faintly brownish; the twentieth cell (about) 

 forming the base of the perithecial appendage which is black, quite opaque, curved outward and upward 

 and geniculate near its base, the inner margin of which is abruptly distinguished (not continuous with 

 the adjacent margin of the tip as in C. confusus); the tip distally hyaline, the apex forming a prominent 

 symmetrical well defined rounded hyaline papilla. Receptacle marked by fine longitudinal striations 

 consisting of three superposed cells almost wholly black and opaque except along their anterior margins 

 and the distal margin of the upper cell, which are pale straw-yellow or amber-colored, the series sur- 

 mounted by two small flattened cells from which arise the perithecium and appendage respectively. Ap- 

 pendage long tapering, consisting of seven or eight superposed cells, clear reddish brown with a blackish 

 tinge, the inner margin as \\e\\ as the distal portion yellowish or amber-colored. Perithecia 300-325 X 

 60 fi, the appendage 150 p. Receptacle 150-160 X 75 p.. Appendage about 175-200 fi. 



On the margin of left elytron of Tropisternus glaber Hb. ( ?), Eustis, Florida, October. 



Although this species is closely allied to C. confusus it may be readily distinguished by its perithecial 

 and antheridial appendages, the latter characteristic in appearance, abruptly distinguished and contrasting- 

 black the former straight stout, rigid, with much larger basal cells, and deep external suffusions. There 

 is moreover a peculiar semi-olive caste to the deeper suffusions, which is not present in other species. 

 The receptacle, like that of C. spinigerus, is marked by fine longitudinal striations, which are only visible 

 in the translucent portion. There may perhaps be some doubt as to the determination of the host which 

 is not certainly T. glaber, though very similar to that species. 



Ceratomyces spinigerus Thaxter. Plate LXX, figs. 5-6. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVII, p. 42. June, 1901. 



Bright amber-brown. Perithecium paler anteriorly, about twenty-eight wall-cells in each row; 

 narrower at the base, the lower half bulging anteriorly, tapering distally where it is rather strongly curved 

 away from the antheridial appendage: the tip hyaline, prominent, obtuse, about half as long as the curved 

 tooth- or spine-like one-celled deep amber-brown appendage, which arises below and beside it. Basal cell 

 of the receptacle large, long, mostly curved, broader distally, opaque; the portion above it relatively small 

 and narrow, concolorous with the perithecium the upper cells marked by fine parallel longitudinal stria- 

 tions. The appendage erect, slightly divergent, stiff, long, slender, rather remotely septate, but the basal 

 cell often broader than long, about seven-celled, tapering distally. Spores 90 X 4 p, in one small speci- 

 men 165 X 4.5 p. Perithecia 425-500 X 70-95 p, the appendage 45-50 p. Receptacle 175-220 p, the 

 basal cell 150-170 p. Antheridial appendage 200-325 p. 



On the inferior anterior margin of the thorax near the base of the right elytron of Tropisternus apici- 

 palpis Cast., Jalapa, Mexico. Sharp Collection, No. 1178. 



A very beautiful species abundantly distinguished by reason of its many peculiarities from all others. 

 It is perhaps more nearly allied to C. Floridanus than to any other and has the same peculiar longitudinal 



