that the two genera might have to be united (see These Proceedings, L, p. 45). The genus Ceraiomyces was originally based on the dipterophilous C. Dahlii from New Guinea, in which not only are cells III-V replaced by a single cell but the appendage has the appearance of being single, that is of arising from one basal cell. In this species, also, a well developed penetrating rhizoid is developed. What appears to be the basal cell in this species should probably be regarded, however, as the insertion-cell; the basal cells of the two branches which arise from it, representing the basal cells of the typical outer and inner appendage in Laboulbenia. A sufficient number of forms have now accumulated on Diptera and Coleoptera which, taken in connection with the two forms on Gryllus described below, make it evident that Ceraiomyces had best be discarded. The forms which may be included in this general section represent a tendency toward the development of a more simple receptacle, just as the aquatic species, and some others, show a tendency toward greater complication than is present in the type-forms. In one of the two closely allied species described below on Gryllus, the black insertion-cell bears but a single basal appendagecell, while cell V is present and is proliferous in a fashion resembling that seen in Laboulbenia proliferans. In the second species, which is so closely allied that it might almost be regarded as a variety only, the structure is exactly that of a typical Laboulbenia, although in both the host is penetrated by a well developed rhizoid. The species heretofore described under Ceraiomyces may therefore best be transferred to Laboulbenia which will therefore include the following forms: Laboulbenia Dahlii, L. Selenae, L. Epitricis, L. obesa, L. miniscula, L. dislocata, L. Trinidadensis, L. Chaetocnemae, and L. Nisotrae.

Dimeromyces falcatus nov. sp.

Male individual. Pale straw-yellow or nearly hyaline, consisting of usually five superposed cells (four to eight) terminating in a small unicellular appendage bluntly pointed, slightly tapering, about three times longer than broad; the basal cell running into the large long somewhat irregular foot, somewhat bent, about twice as long as broad, narrower above the foot, with a broad contrasting distal blackish brown band; the cells above usually successively somewhat smaller or subequal, all or most bearing single antheridia more or less definitely superposed, usually three to five in number. Antheridia long slender colorless; the stalk-cell sometimes even longer than the venter and

Dimeromyces brachiatus nov. sp.

Male individual. Receptacle hyaline, subtriangular above its stalk-like base, the lumen of which is nearly or completely obliterated; consisting of from five to seven cells obliquely superposed, those between the basal and terminal cells much flattened and each associated with a corresponding simple secondary appendage: the terminal cell larger, somewhat rounded distally, bearing the primary appendage distally and the single antheridium laterally. Primary appendage simple, rather short, hardly tapering, with blunt rounded apex, and consisting of a small almost square or slightly flattened basal cell, followed by one to two flattened yellowish brown cells distinguished by dark septa; the rest of the appendage a single elongate cell. Secondary appendages superposed in a single series, somewhat divergent and mostly in contact throughout; similar to the primary appendage, the basal cell large, the flattened suffused cells one to three in number. Antheridium solitary, arising just above the base of the uppermost secondary appendage, its basal or stalk-cell somewhat larger than that of the latter, subtriangular; the venter and neck relatively short, somewhat curved; the antheridial cells about eight in number, the basal cells clearly defined, the neck rather abruptly distinguished, but rather short and strongly bent. Receptacle 46 X 12 μ. Foot 18 μ. Appendages 28 X 4 μ. Antheridium 27 X 9 μ.

Receptacle

Female individual. Hyaline or faintly yellowish. similar to that of the male, consisting of eight to nine cells; the terminal one small, triangular, bearing the primary appendage terminally; the remaining cells above the basal cell bearing either secondary appendages, perithecia, or secondary appendiculate axes: the terminal cell always bearing a secondary axis laterally, the subterminal giving rise to the first perithecium and the cell next below to a secondary appendage, while the remaining cells may produce either of these structures without regularity. Primary and secondary appendages similar to those of the male, but smaller, Secondary axes greatly elongated, suberect, slightly flexed, of about the same diameter throughout, consisting of a single series of a hundred cells more or less very thick walled, arranged in vertical pairs, the successive pairs slightly displaced from right to left; the upper cell of each pair associated distally and externally with a small simple, closely appressed ⚫ appendage similar in all respects to the secondary appendages of the male, and alternating right and left from successive pairs. Perithecia

Female individual. Receptacle hyaline, usually turned so that it is viewed edgewise, somewhat broader opposite the lower secondary appendage, consisting of a longer basal cell and three obliquely superposed flattened cells terminated by the undifferentiated basal cell of the primary appendage; which is small and not otherwise distinguished from the cells below it; the cell above it is distinguished by a black septum, but is not deeply suffused, and is in general like that of the male, though sometimes smaller. A single secondary appendage arising from the subbasal cell of the receptacle, similar to the primary, and separated from its basal cell by a contrasting black septum. Perithecium usually arising from the subterminal cell, of the receptacle, rarely from the terminal, above the secondary appendage; erect or bent sidewise at the base, sessile or the stalk very short, the ascusapparatus filling the whole cavity; asymmetrical, transparent, pale smoky brown, distally rounded outward on one side below the rather abruptly distinguished tip, the base of which is more deeply suffused with blackish; forming a more or less definite transverse black hand, above which it is quite hyaline except for a deep blackish suffusion just below the hyaline apex; which is rounded, slightly asymmetrical and bent. Spores 30 X 4 μ. Perithecia 75 X 20-24 μ. Receptacle 55-65 X 25 μ. Appendages about 40-45 X 7-8 μ. Total length to tip of perithecium 120-135 μ.

On the right inferior posterior surface of the prothorax of a small carabid allied to Tachys, Peradeniya, Ceylon. No. 2093b, and Samarang, Java, No. 2081c. Known also from Borneo and the Philippines.

This species is not nearly allied to any known form. The antheridia are unusually numerous and quite unique in form and appearance owing to the deeply blackened neck and abruptly bent hyaline discharge tube. I have taken the liberty of naming this very distinct form for Mr. T. Petch, whose admirable work on the fungi of Ceylon is well known to all mycologists and to whom I am indebted for all the Ceylon species herewith described.

Dimeromyces appressus nov. sp.

Male individual. Receptacle lying nearly flat on the substratum, the antheridium toward the female; two-celled, the basal cell suffused, broader than long, extending outward beneath the antheridium, the base of which rests on it; subbasal cell concolorous, subtriangular,