receptacle even shorter than the perithecium, the marginal portion beside the perithecium being more prominently developed, almost all the cells here bearing appendages; the primary appendage projecting forward against the tip of the perithecium, which is not otherwise exactly like that of the type.

Rickia nutans nov. sp.

Receptacle colorless, slender, elongate, often branched, the axis consisting of two rows of cells above the basal cell; the three-celled primary appendage remaining above the third cell from the foot, the double axis extending indeterminately beyond it, its distal cell small and distinguished by a finally blackened septum, the other two cells forming a stout basal portion which is wholly free, distinguished by a constriction from the cell which bears it and broader toward its base. The two cell-series, whether primary or secondary, otherwise without appendages, except one to three which always subtend the perithecium below its convex side: the axis terminations curved and slightly broader as the perithecia are reached, about five flattened cells of one of the cell-series forming a hyaline narrow contrasting margin, extending to the apex of the perithecium on its convex side; one to three of the terminal cells of the other series larger, obliquely elongated laterally and upward, the uppermost in oblique contact with the perithecium for a short distance above its base. Perithecium continuing the curvature of the axis which bears it, rich brown, contrasting, the tip much darker, but not otherwise differentiated; two of the lip-cells forming relatively long, stout, tapering, divergent, blunt appendages, which are directed vertically or obliquely downward. Perithecia 58-66 × 20 μ, the apical appendages 15-16 μ. Total length 750 μ or less, the diameter about 12 μ, just below the perithecium about 16 μ.

At the tip of the abdomen of large Passali. No. 2114a, Peradeniya, Ceylon.

This species is very clearly distinguished by its brown appendiculate perithecium and nodding habit, which suggests the head and neck of a flamingo. The third row of axis-cells is not developed as in more typical species, and is represented by the single cell which subtends the primary appendage near the base.

RICKIA BERLESIANA (Bacc.) Paoli.

This species is not uncommon on large Passali in Java, Ceylon and Australia, as well as on various genera of mites which infest them. Among the latter it has been found on Canestrinia sp., Uropoda sp., Celaenopsis sp., and Macrochelus sp. which were collected for me in Java by Dr. W. B. Thompson. On Passali it grows, as a rule, much more luxuriantly, sometimes reaching a length of 800 μ. It is a graceful and very striking species, and is easily distinguished by the dark brown contrasting color of its perithecium and axial row of cells. Unlike most other species having a similar long and slender habit, it does not appear to produce secondary branches of the axis, even when the primary perithecium has been destroyed, although nearly sessile secondary perithecia are occasionally met with.

RICKIA DISCOPOMAE Thaxter.

Since this species was described on the mite Discopoma, it has been found in far better condition growing on the passaline beetle on which the latter is a parasite. It may attain a length of a millimeter, and often branches several times irregularly, as many as six perithecia being sometimes developed at the tips of a corresponding number of axes. No individuals have been noticed on Javan material.

Tettigomyces nov. gen.

Receptacle consisting of an indeterminate series of cells superposed in a single row, or the distal ones longitudinally divided; foot large, black, without penetrating rhizoids. Appendage clearly distinguished, or a mere continuation of the receptacle: in the type consisting of a short series of cells each of which gives rise on its inner side to two opposed series of usually paired antheridial cells, the two series of paired cells arching over a central cavity into which the sperm-cells are discharged, and which opens by a subterminal pore; the cushionlike compound antheridium thus formed compact and clearly defined in the type, while in other species the antheridial cells may be indistinguishable, or more or less irregularly associated in rows with the bases of sterile branches which may arise from the appendage. Peri

thecia somewhat indeterminate, the wall-cells numerous in each of the four rows; solitary, or several developed at intervals from an elongate receptacle. Trichogyne branched, more or less persistent at the base of the perithecium on the inner side. Asci eight-spored. Spores 1-septate; the basal (upper) segment twice as long as the terminal and with lateral cushions at the tip. Ascogenic cells more than two. Owing to the unusual variations which are exhibited by the different species of this genus, it is very difficult to define it satisfactorily. In T. Gryllotalpae, which is taken as the type, the antheridium may be as clearly defined as it is in Eucantharomyces. In fact these organs are very similar in general appearance in the two genera. On the other hand there are some species in which I have been unable to discover any signs of antheridial cells; and in others the latter are associated with the bases of certain sterile branches, arising near the base of the appendage, which closely resembles that of some species of Ceratomyces and its allies, a resemblance which is further accentuated by the characters of the multicellular receptacle and perithecium, and the position of the trichogyne which is left behind at the base of the perithecium. In fact a species like T. brevis would be placed in Ceratomyces without hesitation, were it not for the presence of these peculiar groups of antheridial cells which, from analogy with the type, must be considered compound antheridia. The genus must therefore find its place among the Peyritschiellaceae. There is a certain resemblance between some species of this genus and Spegazzini's Cochliomyces which, although its characters are not at all clearly indicated by the published figures and descriptions, appears to differ in possessing appendages on both sides of the perithecium. There is, moreover, a superficial resemblance to Ecteinomyces which, however, differs in the character of its antheridia and determinate perithecia.

The trichogyne is usually more or less persistent and might readily be mistaken for a branch of the appendage.

The antheridium in the type is terminated by the peculiar spine found in Eucantharomyces and various other genera, which appears to correspond to the persistent apex of the spore. In the present instance this spine lies just beside the subterminal pore through which the sperm cells are discharged from the common antheridial cavity. The asci are certainly 8-spored in some cases although I have not in every instance been able actually to count this number.

It is somewhat remarkable that a single host should in the same locality be parasitized by so many distinct species, but although I have endeavored to reduce the number which may be distinguished

as far as possible, I have been forced to the conclusion that at least seven must be recognized on the Javan host, which, although some of them may be mingled on the same substratum, retain their individuality, without essential departure from their type form. I have even been uncertain whether the type itself might not properly be subdivided. In addition to the eight species here described three others are known to me; two from Africa and one from South America.

Tettigomyces Gryllotalpae nov. sp.

Colorless to pale straw-colored, sometimes faintly suffused with brownish. Receptacle variably elongated, slender or rather stout, nearly uniform throughout, or somewhat broader distally; consisting of from twelve to forty or more superposed flattened cells which become squarish; the distal one divided by a longitudinal septum into two cells, one of which subtends the perithecium, while the other forms the base of the appendage. Perithecium solitary, straight, or somewhat curved outward, tapering more or less continuously from the base to the tip, often somewhat inflated below; the tip well, often abruptly distinguished, narrow and nearly cylindrical, straight or slightly bent, the apex symmetrically rounded or slightly oblique; the outer wall-cells 18-21 in each row, the inner 15-19; usually becoming more or less prominent at maturity, so that the outline may be conspicuously corrugated. Appendage erect, or diverging at right angles from the perithecium; variably and often abnormally developed; consisting of from four or five to a dozen, usually somewhat flattened and obliquely superposed cells, slightly prominent externally, all of which, except the basal and terminal ones, may bear, on the inner side, paired double rows of antheridial cells; the terminal cell sometimes bearing also a short sterile branch beside the terminal minute spine-like process. Perithecia 135-310 X 35-62 μ. Spores 45-50 X Appendage 40-60 × 25-40 μ. Receptacle 550-1400 X 2565 μ. Total length to tip of perithecium 235–1560 μ. On the inferior surface of the abdomen and on anal appendages of Gryllotalpa Africana Palis. Samarang, Java.

4.5 μ.

This species varies very greatly not only in size, as will be seen by the measurements above given, but in the character of its perithecium and appendage. The latter in the type form is more or less erect and stout, with the rows of antheridial cells lying subhorizontally or obliquely inward and upward, and this character is usually associated

with a stouter receptacle, the outline of the perithecium being more conspicuously corrugated and the tip broader, somewhat asymmetrical and slightly bent distally. The more common type on the abdomen differs at maturity in possessing a usually more slender receptacle, which may be very greatly elongated, the appendage projecting at right angles to the main axis and roughly triangular in outline; the rows of antheridial cells vertical, or even oblique outward; the sterile cells decreasing rapidly in size to the tip: the perithecium having a less prominently corrugated outline, and the tip longer, more abruptly distinguished, nearly isodiametric, slender, with a symmetrically rounded apex. A third variation which occurs on the inferior surface of the thorax and adjacent parts of the abdomen and legs, is usually smaller and stouter; the appendage becoming very soon disorganized and remaining as a yellowish mass beside the base of the perithecium. The latter is less characteristic in form; the tip not well distinguished and stout, the outline hardly corrugated. Although the association of characters in these three variations is more or less constant, and the extremes might readily be separated as distinct species, intermediate conditions are sufficiently numerous to make the series more or less continuous.

This species is by far the most abundant of those described, and from its large size and conspicuous black foot, is readily seen even with the naked eye. A species very closely allied, and perhaps identical, has also been examined from African Gryllotalpae.

Tettigomyces pterophilus nov. sp.

Nearly colorless. Receptacle slender, variably elongated, more or less uniform above the basal region which may be slightly narrower, straight, curved, or somewhat sinuous, the cells slightly prominent and separated by more or less distinct constrictions at the septa. Appendage, which is assumed to arise opposite the base of the uppermost perithecium, not distinguished from the receptacle, slender, elongate, curved outward, tapering to a sterile termination; bearing at irregular intervals from its inner side, single scattered branches of variable number, simple or usually not more than once branched, and resembling the termination of the appendage. Perithecia one to four, or even five, superposed and arising at variable intervals from the receptacle, the axial trichogyne more or less persistent and associated with a small appendage just above it, the basal cell of which appears