OF ARTS AND SCIENCES. 163 



dages. Appendages mostly fertile, borne on one or two squarish basal 

 cells, terminated by a simple or once branched short filament. Peri- 

 thecia short, thick, subcorneal, the apex subtruncate, the base slightly 

 inflated, borne on a long stalk made up of a single basal and two sub- 

 basal cells, the outer directly in contact with the perithecium, the inner 

 separated from it by two small cells. Spores 60 x 4 fi. Perithecia 

 110-130 X 60-70 ft. Appendages, longer, 80 /*. Receptacle 130-1 65 

 X 70-95 p. Stalk of perithecium, longest, "200 p. 

 On abdomen of Deleaster dichrous Grav., Germany. 



Laboulbenia umbonata, nov. sp. 



Perithecium becoming faintly suffused with brown, projecting free 

 from the receptacle at an angle of about 60°, the outer margin curved 

 inwards strongly to the blackish tip, the prominent ear-like lips of 

 which are strongly incurved ; a clearly defined rounded prominence on 

 the inner side below the apex. Outer appendage hyaline, or with 

 faint brown shades, consisting of a large stout cylindrical basal portion 

 nearly equalling the receptacle in diameter and length, made up of a 

 basal and somewhat shorter sub-basal cell from the distal end of which 

 arise two (rarely three) straight, very long and slender tapering 

 branches. Inner appendage arising from a very small triangular basal 

 cell, its external wall directly continued by that of the outer appendage 

 by which its upper surface is covered, its lower half cutting off ob- 

 liquely a small portion of the large black insertion cell : its upper half 

 producing sublaterally a single short appendage, consisting of a sin- 

 gle cell bearing at its apex two rather loug antheridia. Receptacle 

 characterized by a stalk-like slightly inflated base, made up of cells ( 1 i 

 and (2), which are very large, the cells of the distal portion except 

 cells (4) and (5) very greatly reduced, so that the perithecium appear.-, 

 to arise almost directly from cell (2). Cells (4) and (5) elongated, 

 the upper half of cell (5) free from the perithecium; the axis of tin- 

 receptacle coincident with that of the outer appendage. Spores 60 X 

 5 fi. Perithecia 110 x 59 ^ (including the hump which projects about 

 7 fj.). Appendages (longest) 925/*. Receptacle 155-185 X 18-3.'!^. 



On right side of thorax of Stennlophus ochropezus Say, Maine. 



Laboui.bf.nia subterranea, nov. sp. 



.More or less suffused with brown, or with the two basal cells quite 

 hyaline. Perithecia long, slightly inflated at the base, tapering more 

 or less evenly to the subcylindrical apex, the lips of which are turned 



