THAXTKR. — 



MONOGRAPH OP TIIK LABOULBENIACFJE. 



295 



Usually on the basal half or at tin* base of the left elytron of Anthicus flora/Is Linn. Fresh Pond, 

 Cambridge. 



This species is readily distinguished by the characters of its perithecium, the general form of which 

 is unlike that of the related I). Anthici, and which bears a terminal prominence not found in any other 

 species. The sterile cell of the receptacle is also as a rule more pointed than in other species, and rela- 

 tively somewhat smaller, and the perithecial stalk-cell is usually abruptly bent or twisted. It is less com- 

 mon than either of the other species on this host. 



DlOICOMYCES SP1NIGERUS Thaxter. Plate XLII, figs. 30 34. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVII, p. 34. June, 1901. 



Male individual similar to that of D. Anthici, much smaller, the extremity less prominent, or almost 

 horizontal, the discharge tube somewhat more slender, and more often erect. Total length including 

 foot 40 X 6.5 //; to tij) of discharge-tube 47 p. 



Female individual. Receptacle relatively small, tinged with dirty yellowish, edged with brown to 

 the tip of the small terminal sterile cell. Perithecium dirty yellowish and relatively large, considerably 

 and more or less symmetrically inflated, above and including its basal cells, to the base of the tip, which 

 is bent abruptly outward at right angles to the axis of the pcrithecium; the apex broad, blunt, the lip- 

 cells hardly projecting: a unicellular brown, straight or slightly curved, spine-like process, which tapers 

 to a blunt point, projects upward at an angle of about 45° from the middle of the outer (anterior) margin 

 of the pcrithecium; and a slight elevation is also more or less distinct between its base and that of the tip; 

 the stalk-cell, relatively short, becoming rapidly narrower toward its base. Spores (male) 26 X 4 p, 

 (female) 40 X 6 p. Perithecia including basal cells 125 X 50 p, the spinous process 55 p, the stalk-cell 

 36 10 ft. Receptacle to tip of sterile cell about 45 p. Total length to tip of perithelium about 185 p. 



On Anthicus floralis Linn., with the last two species, more commonly on the inferior surface of the 

 abdomen. Fresh Pond, Cambridge. 



This species is the most peculiar member of the genus and is at once distinguished by the spine-like 

 outgrowth from one of the anterior perithecial wall-cells, as well as by other characters. It is a rather 

 rare species, but sufficiently abundant material has been examined to show that its characters are quite 

 constant. 



Dioicomyces Floridanus Thaxter. Plate XLII, figs. 35-36. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVII, p. 33. June, 1901. Amorphomyces Floridanus Thaxter, 1. e., Vol. 



XXVIII, p. 159. 



Male individual. Relatively large, long, brown, the discharge-tube long slender curved, the tip of 

 the antheridial cell prominent beyond its base. Length 55 X 8 p; the discharge-tube 24 p. 



Female individual. Color brown. Perithecium stout strongly curved inward the upper half nearly 

 straight and symmetrical blunt-tipped; the stalk-cells lightly inflated, nearly isodiametric. Receptacle 

 normal. Perithecium about 150 X 50 p. Total length about 200 p. Receptacle to tip of sterile cell, 

 including foot, 65 p. 



Type on abdomen of Bled i us basalis Lee, Florida, Henshaw Collection: on Bled ins sp., Ipswich, 

 Mass. 



This species was originally described from a single female individual from Florida under the genus 

 Amorphomyces, but proves to correspond in all respects to the type of the present genus. A single pair 

 has been obtained from a small Bledius collected by Mr. Emerton on the sand dunes at Ipswich, and 

 the male proves to be somewhat different from those of the other species in its brown color, larger relative 

 size, and elongate curved discharge-tube. The female resembles that of D. Anthici more closely than 

 it does either of the other species, but differs in its stouter form and the nearly isodiametric stalk-cell of 

 its perithecium, as well as in its darker brown color. 



