THAXTER. — LABOULBENIALES PARASITIC ON CHRYSOMELIDAE. 49 



Ceraiomyces Chaetocnemae nov. sp. 



Straight or but slightly curved, relatively long and slender. Cells 

 I and II hyaline, becoming tinged with pale reddish yellow; cell I 

 often somewhat elongate, usually somewhat more than twice as long as 

 the subbasal cell, from which it is separated by a nearly horizontal 

 septum; cell III concolorous with the perithecium, well distinguished. 

 Insertion of the appendage somewhat oblique, blackened, the latter 

 bearing two inner antheridia and one outer, the necks of which are 

 subtended by a conspicuous spine. Perithecium slightly less than 

 two thirds free above the insertion of the appendage; becoming dark 

 blackish olivaceous; the stalk- and basal cells hardly distinguishable, 

 rather long and narrow, tapering distally; the tip becoming distin- 

 guished by slight subtending elevations; the lips tending to turn 

 slightly outward, two of them bearing minute flattened papillae which 

 project above the otherwise rather bluntly rounded, slightly sulcate 

 apex. Perithecium 90-116 X 38-42 \i. Spore 52 X 4 /z. Cells I-II, 

 60-122 X 22-25 y.. Cell III, 38-42 X 8-10 p.. Appendage 30 \i. 

 Total length to tip of perithecium 160-250^. 



On the elytra of Chaetocnema sp., No. 2248, Amazon, Mann, on 

 C. minuta Mels. No. 2460, 2461, Port of Spain, Trinidad: on Epitrix 

 lucidula Har., No. 2457, and E. convexa Jac, No. 2458, Port of Spain. 



Although varying considerably in size, this species is much larger 

 than any of the others which occur on Chrysomelidae, with the excep- 

 tion of C. Nisotrae. It appears to be quite rare and usually not more 

 than one or two individuals are found together on a single host. A 

 form apparently not separable from this species was also found in 

 Port of Spain on a single individual of Scolochrus sp. 



Ceraiomyces Nisotrae nov. sp. 



Comparatively large, short and stout. Receptacle dirty brownish 

 yellow throughout, obscurely punctate above the basal cell, which is 

 short and abruptly bent, its upper half abruptly twice as broad ; cell 

 II hardly longer than broad and but slightly larger than the stalk-cell 

 (cell VI of Laboulbenia), which lies just above it; cell III hardly 

 extending above the perithecial cavity, and lying opposite the stalk- 

 and basal cells, which are clearly defined and, like it, dirty yellowish 

 brown. Insertion of the appendage slightly oblique, its basal cell 

 almost wholly suffused with dark brown; basal cell of the outer branch 



