very small much narrower squarish subbasal cell; the terminal cell hyaline elongate slightly inflated below, tapering distally; sometimes extending to or beyond the tip of the antheridium. Total length, including foot, 60 μ. Antheridium, including stalk-cell, 35 μ; its neck 8 μ. Appendage, 20-30 μ.

Female individual, becoming dark blackish brown, the primary appendage erect, consisting of a larger basal cell hardly twice as long as broad, a narrower subbasal cell broader than long, and a terminal cell, hyaline or paler distally, longer than broad, inflated or degenerating. Perithecia usually not exceeding three in number, elongate, straight or curved, blackish brown, very slightly inflated; the tip bluntly rounded, or asymmetrical and snout-like, when viewed laterally: the hyaline apex subtended, on the inner side, by a darker shade. The secondary appendages of two or three superposed cells, hardly a third as long as the perithecia, alternating with them, or somewhat irregular in position, especially above; the series of cells which bears them, and the marginal extension of the basal cell of the receptacle nearly erect, or diverging from the appendage at an angle of not more than 45°. Perithecia 75-100X15-20 μ. Secondary appendages 2530 μ. Total length to tip of highest perithecium 100-200 μ; to tip of secondary receptacle 75-120 μ.

On Atheta sp., Palermo, Nos. 1690, 1965, and 1966.

This species, which was found not infrequently, appears to vary considerably; the older and better developed individuals becoming very dark, and attaining a considerable size. Such individuals, which usually occur on the abdomen, do not appear to be separable from smaller and paler forms which occur, usually, on the legs, antennae and head.

Rickia Lispini nov. sp.

Receptacle short and stout, the basal cell small, hardly longer than broad; the main body consisting of a central cell lying between a pair of marginal cells superposed on either side of it, the two lower united below it and separating it completely from the basal cell; while its extremity lies in oblique contact with the lower half, or less, of the perithecium; the upper marginal cell on one side cutting off one to two small appendiculate cells which subtend the base of the perithecium; the upper marginal cell on the opposite side, bearing two or three to six simple appendages, their origins often lying nearly horizontally, one to five of them arising from single small cells successively separated

from above downward (within outward), one, however, always subtended by two minute cells placed not always next the perithecium, and representing the primary and originally terminal appendage. Perithecium short and stout, but slightly longer than its contained spores, subellipsoid to ovoid, the tip hardly distinguished, the apex truncate-papillate. Spores 28X4 μ. Perithecia 40-50X27-31 μ. Total length Appendages 20-55 μ.

Receptacle 60-75 × 28–35 μ. 75-120 μ, average 90-100 μ.

On the abodmen etc. of Lispinus tenellus Er., Llavallol No. 1502. Also from Los Amates, Guatemala, No. 1625 (Kellerman).

Were it not for the fact that the genus Rickia, as illustrated by the material accumulated from various parts of the world, proves to be a large and very varied one, I should be inclined to separate the present form under a special generic name; and, although it seems best to treat it as a very simple type of Rickia, it differs from all others in the fact that all its appendages come from the two distal marginal cells. In a few specimens I have seen a structure associated with the appendages which may be an antheridium; but, in a majority of individuals these organs seem to be quite absent. This appears to be the case also in other and more typically developed species of the genus.

Rickia Melanophthalmae nov. sp.

Hyaline. Perithecium long-ovoid, with a broad truncate apex which may be flat or slightly sulcate, the lumen of the basal wall-cells obliterated, their thick walls forming an ellipsoid cavity in which the spores, which nearly equal it in length, lie somewhat obliquely, and above which the three upper tiers of small subequal wall-cells persist. Receptacle broad and compact, multicellular above the single basal cell; the cells in three vertical series, two lateral and one median; one of the outer consisting of a single somewhat elongated cell, which may rarely be divided into two or three cells, above which lie the three visible basal cells of the perithecium, which are subequal and form an integral part of the receptacle in no way distinguished from it; the marginal series on the opposite side consisting of two to four cells, usually rather narrow, each usually cutting off a small cell obliquely, distally and externally, the uppermost subtending a hardly distinguishable antheridium, the rest developing neither appendages nor antheridia and often becoming wholly obliterated; the series terminated by a small cell which bears the small short stout primary appendage of the usual type; the median series consisting of three superposed

cells, the two lower larger, the upper lying beside the base of the perithecium. Perithecium 35-43×23 μ. Spores about 40X2.5 μ. Receptacle 40X27-31 μ. Total length 75-85 μ.

On the elytra of a minute beetle belonging to the genus Melanophthalma. Llavallol, No. 1980.

This curious little form is distinguished by the apparent absence of any secondary appendages, the cells which are separated to subtend them in other species, developing nothing more than mere rudiments, and often becoming quite obliterated by the general enlargement of the receptacle, the cells of which may become somewhat displaced. On the perithecial side the usually single marginal cell cuts off no subtending cell even when it becomes divided. Like the preceding species this form is distinctly aberrant.

Monoicomyces Caloderae nov. sp.

Straw-colored, the perithecia and older appendages becoming tinged with amber-brown. Basal cell of the receptacle stout, squarish, the subbasal cell less than half as large, pale straw-colored or nearly hyaline. Primary appendage concolorous with the receptacle, elongate, its tip often extending above the tips of the perithecia; tapering slightly to a blunt extremity, simple or usually producing one or two branches from the third or fourth cells on the inner side. The two primary fertile branches variously complicated by successive proliferation of the secondary branches, the branchlets of which may be of the second or even the fourth order, the perithecia subtending the antheridia. Antheridium of the usual type, its tiers and appendages somewhat variably developed, but resembling in general those of M. Homalotae. Perithecia rather short and stout usually symmetrical, inflated below, conical above; the apex small, blunt; the basal cell-region not distinguished from the ascigerous region; the stalk-cell well defined, its basal half usually slightly constricted and suffused with vinous amber-brown. Spores 38X4 μu. Perithecia, including basal cell-region, 80-90X30-35μ; the stalk-cell 25X12 μ. Receptacle about 25X20 μ. Primary appendage 150-175 μ. Appendages 75100 μ. Antheridium 90 X 35 μ.

Usually on the abdomen of Calodera sp. Nos. 1504, 1515, 1691 and 1991, Palermo, Temperley and Llavallol.

Although very common this species is seldom if ever found in good condition, perhaps owing to certain peculiar habits of its host. The appendages are usually broken off entirely and the development of

the fertile branches may be very irregular. Although perhaps a dozen perithecia may be formed on a single individual, many are apt to be broken and but few ever mature. The species is most nearly allied to H. similis and H. Homalotae from both of which it is distinguished by the character of its primary appendage and by the proliferous habit of its fertile branches. The genus of the host has been determined by Dr. Fenyes.

MONOICOMYCES INFUSCATUS Speg.

Receptacle very small, the basal cell becoming more or less suffused with smoky brown, broader than long, the hyaline subbasal cell hardly distinguishable. Primary appendage stiff rigid upcurved, black externally from its base upward, simple or producing a single branch above its subbasal cell which may be similarly blackened. Fertile branches usually producing a single perithecium and antheridium, more rarely two by proliferation, suffused, especially externally, with blackish olive-brown; the two distal tiers forming a well defined rounded enlargement, terminated by two erect blackened rigid appressed hyaline-tipped appendages. Perithecium hyaline or faintly olivaceous, slightly asymmetrical, subfusiform, the tip hardly distinguished, the apex blunt, the narrower basal cell region not distinguished, the basal cells relatively large, the stalk-cell short and broad, not abruptly distinguished below the basal cell-region. Spores, in perithecium, about 20X2.7 μ. Perithecia 90X26 μ, the stalk-cell 18X12 μ. Antheridium 45-70 μ, its appendages 45-70 μ. Primary appendage with its branches, 110 μ. Receptacle 18×12 μ.

On the abdomen of Xantholinus Andinus Fauv., No. 1689, Palermo, No. 1988, Llavallol.

A small and apparently rare species, very closely allied to M. nigrescens and distinguished especially by its rigid black primary appendage.

Mimeomyces nov. gen.

Receptacle consisting of two superposed cells, the upper bearing terminally the single appendage and the stalk-cell of the single perithecium. Appendage consisting of a basal cell and several cells superposed above it, the lower bearing single free compound antheridia on the inner side, the upper bearing sterile branches. The antheridia consisting of a group of apparently six similar antheridial cells and originating directly from the slightly swollen extremity of a short

stalk-cell and discharging at the same level into the efferent tube. Perithecia stalked and normal.

The characters of this genus correspond exactly to those of Corethromyces Quedionuchi which occurs with it on the same host, and in general to that section of Corethromyces formerly separated under Sphaleromyces, except that the lower branches of the appendages bear conspicuous, typically developed compound antheridia. It seems altogether probable that certain of the species hitherto placed in Sphaleromyces, and in which the presence of antheridia has not yet been definitely recognized, may find a place in the present genus when their antheridial characters are known. A careful reexamination of my material of these species has, however, failed to show any indication of the conspicuous antheridia which occur in the present instance.

Mimeomyces decipiens nov. sp.

Perithecium pale translucent yellowish, the basal cells relatively large and clearly distinguished, the ascigerous part usually bent slightly toward the appendages, distally slightly inflated, symmetrical, conical; the tip hardly distinguished, terminating in a small subtruncate apex: stalk-cell short, broader than its length. Basal cell of the receptacle elongate, rather abruptly broader distally, concolorous with the perithecium or more or less deeply and completely suffused with blackish brown, sometimes quite opaque; the subbasal cell small, subtriangular. Appendage consisting of from four to five obliquely superposed cells, subequal in length, the distal ones smaller, the basal without appendages, the subbasal and often the cell above it bearing each a single compound antheridium on a short stalk-cell. Perithecium (sporogenous portion) 55-65×24 μ, including basal and stalk-cells 75-95 μ. Main appendage 50-55 μ, its longest branches 60 μ. Receptacle 50-70 μ, basal cell (longest) 60 μ. Total length to tip of perithecium 125-150 μ. Spores about 30X2.5 (measured in ascus).

On legs and abdomen of Quedius sorecocephalus Bernh. (nov. sp.), Llavallol, No. 1520.

The general form and coloration of this species is very similar to that of Corethromyces Quedionuchi which may occur with it, but the color and the form of the tip of the perithecium, as well as the conspicuous antheridia distinguish it at a glance. One or more accessory antheridia are sometimes present near the base of the appendage. The host has been determined as a new species of Quedius by Dr. Bernhauer.