THAXTER. — LABOULBENIALES PARASITIC ON CHRYSOMELIDAE. 25 



olivaceous; cells II and III subequal; cell IV forming a short blunt 

 prolongation external to and beyond the insertion-cell; cells II-IV 

 becoming almost or quite opaque and indistinguishable, except along 

 their inner margins; cell V relatively large and rounded, suffused with 

 olivaceous brown, as is cell VI, which lies obliquely below it, is of 

 about the same size, and is separated by a deep indentation from the 

 outer lower basal cell of the perithecium immediately above it, which 

 is quite hyaline, bulging asymmetrically outward and separated from 

 the cell above it by a deep indentation. Insertion -cell rather thick, 

 black; lying horizontally in the deep depression formed between the 

 base of the perithecium and the projecting termination of cell IV. 

 Outer appendage deeply suffused at the base and externally, curved 

 outward, consisting of usually two larger basal and subbasal cells; 

 the former giving rise to a subterminal inner branch, and the latter to 

 a subterminal inner and two or three terminal short branches, the 

 outer black and abortive; the basal cell of the inner appendage nearly 

 as large as that of the outer, bearing a branch on either side which is 

 very similar to the outer appendage and externally suffused; all the 

 branches rather short and stout, more or less suffused about the base. 

 Perithecium wholly free, the upper basal cells forming a very short 

 stalk, relatively large, long and narrow; the venter hardly inflated, 

 opaque or nearly so; the tip translucent, not distinguished from the 

 venter, except by a clean cut transverse line of demarcation; the 

 hyaline apex subtended externally by two superposed long hyaline 

 slightly outcurved horn-like appendages, the lower an extension of a 

 laterally misplaced lip-cell, the upper a subterminal projection from 

 the outer of the three remaining lip-cells which surround the sulcate 

 pore; the latter turned slightly inward. Peri thecia 90-120 X 20-25 fx, 

 its horn-like appendages about IS X 6 /z. Spores 35 X 3.5 /x (meas- 

 ured in perithecium). Receptacle average 52 X 28 it. Appendages 

 longer 52 p.. Total length to tip of perithecium 125-175 /j,. 



On the elytra of Lema gracilis Jac, No. 2212, Para, Brazil (Mann), 

 on Lema sp., Port of Spain, Trinidad, No. 2477; on Lema sp., 

 Suriname, No. 2480 (Rorer). 



A very peculiar species distinguished from its near ally, L. Bruchii, 

 by the peculiar horn-like processes which subtend the apex. The 

 lower of these processes is formed by the abnormal termination or 

 the left posterior series of wall-cells which, instead of forming a lip- 

 cell, bends abruptly outward as it traverses the tip, crossing the 

 series external to it and projecting as a free appendage. The two 

 horns are sometimes malformed and somewhat misplaced, but are 

 usually well developed and symmetrically placed one above the other; 



