THAXTER. — NEW LABOULBENIACEAE. 43 



Receptacle 1 75-220 /x, the basal cell 150-170 /*. Antheridial appendage 

 200-325 fx. 



On the inferior anterior margin of the thorax near the base of the right 

 elytron of Tropisternus apicipalpis Cast. Jalapa, Mexico. Sharp Col- 

 lection, No. 1178. 



Ceratomyces procerus nov. sp. 



Rather pale amber brown. Perithecium very elongate, of nearly 

 equal diameter throughout, the wall-cells in each row more than sixty 

 in number ; the conformation at the tip similar to that in O. confusus ; 

 the perithecial appendage erect, short and stout, consisting of about ten 

 cells, distally curved outward, tapering from its broad base to the bluntly 

 pointed tip. Appendages (broken) and receptacle much as in C. con- 

 fusus. Perithecium 800-850 X 65 /x, its appendage 125 /x. Total length 

 to tip of perithecium more than one millimeter. 



On the inferior surface of the abdomen (near the middle) of Tro- 

 pisternus sp. San Fidelio, Brazil. Museum of Comparative Zoology, 

 Cambridge, No. 1338. 



Ceratomyces curvatus nov. sp. 



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 appen- 

 dage 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 /x. Perithecia 500-615 X 75 [x (below) X 60 /x 

 (distally), the appendage 150^. Total length to tip of perithecium 

 600-700 (i, to tip of antheridial appendage about 250 /x. 



On Tropisternus Caracinus N. on inferior surface of abdomen near 

 the tip. Caracas? Berlin Museum, No. 1057. 



Ceratomyces Mexicanus nov. sp. 



Dark amber brown. Perithecium with a slight submedian inflation ; 

 distally broad, the outer margin turning abruptly inward distally to the 

 inconspicuous retracted tip, which lies close at the base of the perithecial 

 appendage, and is externally subtended by irregular inconspicuous papil- 



