38 PROCEEDINGS OF THE AMERICAN ACADEMY. 



tata is in part similar to that from P. lutea, but one specimen of the 

 latter species bears a distinctly larger, rather slender, straight form, 

 in which the twist of the wall cells of the straight perithecium is more 

 distinct; so that its tip is nearly always seen at right angles to the 

 normal position, and appears broad and flattened and quite unlike 

 the more typical form, which occurs on other specimens of the same 

 species. The form is most nearly related to L. orientalis, the funda- 

 mental characters of its appendages being very similar. The latter 

 may prove to be longer than above indicated when perfect specimens 

 become available for examination. 



Laboulbenia Diabroticae nov. sp. 



Perithecium relatively large, its basal cells and basal wall-cells 

 concolorous with the receptacle, dirty yellowish, the rest rich trans- 

 lucent brown, except the hyaline outer half of the apex, the right 

 anterior lip-cell forming distally and externally a more or less distinct 

 truncate projection, its fellow usually shorter and rounded. Recep- 

 tacle variable, stout, sometimes short, sometimes elongate through 

 the elongation of cells I and II; cell III + IV relatively small, bulg- 

 ing somewhat externally; cell VI nearly as large as cell III + IV, 

 sometimes larger; the basal cells of the perithecium distinct above it; 

 all the cells distinguished by more or less evident constrictions. 

 Insertion-cell nearly opaque, as are the bases of the appendages; 

 basal cell of the outer appendage bearing a double row of close set 

 radially disposed branches; which may be twice branched, hyaline 

 within or deeply suffused throughout, some or all of their tips bent 

 abruptly outward or sidewise, or strongly recurved, the curved por- 

 tion tapering to a blunt point; the branches of the inner appendage 

 similar to those of the outer; the branchlets as a whole successively 

 longer from without inward, seldom reaching to the tip of the peri- 

 thecium, the septa oblique. Perithecium 100-225 X 20-28 fx. Spores 

 about 50 X 5 li. Appendages, longest 120-140 fx. Receptacle to 

 insertion-cell, longest, 265 fx; average 175 X 35 (x. Total length to 

 tip of perithecium 300-390 /x. 



On elytra of Diabrotica Fairmairei Baly (Types), No. 1771, Bio- 

 logia Coll., Jalapa, Mexico: of Diabrotica sp., No. 2471, Port of Spain, 

 Trinidad: on legs of Diabrotica sp., No. 1641, Los Amates, Guatemala, 

 (Kellerman). 



This well marked species varies considerably in the dimensions of 



