Til \XTER. 



MONOGRAPH OF THE LABOULBENIACE E. 



425 



including about eight to ten cells which form its erect free termination beside the base of the perithecium; 

 the three lower cells mostly suffused with red brown, those above hyaline or partly suffused, increased 

 in size to about the eleventh cell, above which they become successively smaller to the tip of tlx- free 

 portion; the septa for the most part marked by rather prominent constrictions. Appendages numerous 

 but not obscuring the main axis of the receptacle, slightly divergent, mostly tapering distally and slightly 

 bent below the straight hyaline tips; those arising about the base of the perithecium only slightly longer 

 and stouter, brown and mostly blunt tipped, about six in number and as a rule hardly extending to the 

 middle of the perithecium. Spores about 40-45 X 4 /*. Perithecia 140-200 X 40-00 p. Receptacle 

 220 .'540 ft. Total length to tip of perithecium 300-1000 p. Longest appendages about 100 p. 



On PhUontkus longicornis Stcph., British Museum, No. 408, Island of St. Helena; on Philonthus 

 sp. indet, Hope Coll., No. 225, British Isles. Berlin Museum, No. 814 on P. albipes Grav., Sweden; 

 No. 827 on P. exiguus Nord., Europe. Sharp Coll.; No. 1132, on P. gastralis Sharp, Japan; No. 112!) 

 on P. mutatis Sharp, China; No. 1107 and 1109 on Amir h rot us apwipcnnvs Sharp, Japan; No. 1193 on 

 Amichrotus sp., Japan; No. 1133 on a new genus near Amichrotus, Japan. 



Although this species has not yet been seen from America, it appears to be widely distributed in the 

 western hemisphere, as is indicated by the above list of hosts. It is a well defined species, varying mostly 

 in size, the very large specimens (fig. 3) occurring on Amichrotus, a genus said by Dr. Sharp to be very 

 near, if not identical with Philonthus. Its numerous rather short stiff appendages do not differ greatly 

 in length throughout the receptacle, and are characteristically bent at the tips. An individual typical in 

 form and size is represented in fig. 4 which was obtained from a British Philonthus. The species is most 

 nearly allied to R. Ordirliiri and R. arbusculus, the latter differing in the form of its perithecium and the 

 differentiation of its appendages. 



Rhachomyces Dolicaontis Thaxter. Plate XLIV, fig. 8. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVII, p. 39. June, 1901. 



Form elongate. Cells of the main axis of the receptacle twenty to thirty-five, more or less dirty 

 brownish, banded with dark blackish brown below, while the more slender proximal cells are usually 

 opaque; the axis of nearly equal diameter throughout and nearly straight above about the eighth cell; 

 each cell containing distally one, the axis cells two, roundish or oblong brown bodies (possibly valve-like 

 structure) which suggest the stigmata of an insect larva. The appendages somewhat divergent, opaque, 

 except a narrow upper hyaline margin, short, stiff and numerous; those external more slender, slightly 

 curved and sharply pointed; those between somewhat stouter and longer, with slightly recurved tips; 

 those about the base of the perithecium, which they do not conceal, but slightly longer and few in number. 

 Perithecium short-stalked, slightly more or less symmetrically inflated, dull brown, minutely punctate 

 or granular, not uniformly suffused; the tip with darker shades, the blunt apex hyaline. Spores 66 X 5 p. 

 Perithecia 150-200 X 42-60 including the basal and stalk-cells. Larger appendages 90-110 /i, smaller 

 about 75 /(. Total length 600-1100 fi, the average diameter about 30-35 p. 



On all parts of Dolicaon Lathrobioidcs Casteln. Cape of Good Hope, Africa. Sharp Collection, 

 No. 1146. Berlin Museum, Nos. 833 and 842. 



A specimen of this large staphylinid in Dr. Sharp's collection was found completely covered by this 

 fine species. It differs from the other elongate forms in its rather small and not very numerous mostly 

 divergent appendages. The peculiar stiginata-like markings on the cells of the receptacle are unusually 

 conspicuous in the species, and the dark lines which separate the perithecia! wall-cells are usually more 

 pronounced than is indicated in the figure. The surface of the perithecium appears to become granular 

 as it matures, and more deeply suffused with brown. The characters of the species are very constant 

 although there is some variation in size. 



