314 



THAXTER. MONOGRAPH OF THE LABOULBENIACE^E. 



Although Dr. Speiser in his note above referred to, appears to consider this form identical with A. 

 Nyctcribia', there can, I think, be no doubt whatever of its specific distinctness, as a comparison of the 

 accompanying figures will clearly show. The appendage in this species resembles that of Stigmatomyces 

 more closely from the somewhat unilateral position of the antheridia; which are fewer in number than in 

 the other species. The host examined was an alcoholic specimen, the Type of Dr. Speiser in the Berlin 

 Museum, and was one of the many interesting forms brought by Dr. Dahl from New Pommerania, near 

 New Guinea. The specimens are mostly broken from the host in removal, yet in a few specimens in 

 which a fragment of the integument adheres, the entering rhizoids are clearly seen forming a dense mass 

 of tortuous branching filaments, which it is quite impossible to follow in detail. The rhizoidal apparatus 

 in this species is more extensively developed than in any other form, not excepting that which is repre- 

 sented in an unbroken condition in the figures of Ceraiomyces Dahl it (Plate XLIII, fig. 4). 



Arthrorhynchus Eucampsipod.e Thaxter. Plate XLVIII, figs. 11-14. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVI, p. 109. March, 1902. 



Hyaline throughout. Perithecium straight or distally slightly curved, tapering gradually from the 

 middle, or lower, to the broad tip; the apex consisting of a slight median projection surrounded by a 

 crown consisting of four slightly shorter, broad, blunt, distinctly divergent projections, which show indis- 

 tinct marks of lobing and are symmetrically placed; the stalk-cell about one half as long as the perithe- 

 cium or less. The basal cell of the appendage constricted in the middle as in the preceding species, the 

 lower half irregularly rounded and four or five times as large as the upper half, which is very small, color- 

 less, and less than half as wide as the cell above it ; the fertile cells three in number, the lower bearing 

 four or ( ?) five antheridia, the upper three in addition to the terminal one, which is furnished with a short 

 hyaline basal spine; the necks of the antheridia large, tapering, divergent. Receptacle as in the preced- 

 ing species. Spores about 45-50 X Perithecium: venter 250-325 X 05-75 u; the stalk-cell 110-150 

 X 55 ft. Appendage, 75-90 fi, the stalk-cell 35 X 25 (the upper half X 10 ft). 



On the abdomen of Eucampsipoda Hyrtli Kol., Egypt. Berlin Museum, No. 855. 



As in the case of the preceding species, Dr. Speiser is inclined to consider this form as identical with 

 A. Nyctcribiw, but it seems certainly distinct. It is undoubtedly much more closely allied to A. Eucamp- 

 sipoda, from which it differs more especially in the details of its appendage. As may be seen by a com- 

 parison of figs. 14 and 3, the antheridia of the present form are more numerous and differently disposed, 

 while the conformation at the base of the appendage is quite different in the two cases, the upper lobe of 

 the stalk-cell being very small and not continuous with the base of the appendage proper, as in A. Cyclo- 

 podicB. The four lobes at the tip of the perithecium are short and more like those in A. Nyctcribia', but are 

 not three-lobed as in that species. 



Idiomyces Peyritschii Thaxter. 

 Additional material of this species has been obtained as follows: Hope Collection, No. 223 on Delc- 

 aster dichrvus, England: and from Scotland on the same host in the Sharp collection: British Museum, 

 No. 393, Europe. On D. adustus, Sharp Collection No. 1093, England. I found the peculiar host flying 

 in the evening at Lauterbrunnen, Switzerland, in the village street, and one of the specimens bore a few 

 individuals of this curious form, which seems to be a transitional type between Stigmatomyces and the 

 group of genera immediately associated with Teratomyc.es; in which the proliferation and production of 

 appendiculatc cells about the base of the pcrithecial stalk-cells has become much more marked. 



SYMPLECTROMYCES nov. gen. 

 Receptacle consisting of three to four superposed cells, the distal one irregularly proliferous, the pro- 

 liferations resulting in the formation of numerous appendiculate cells, or short appendiculate branches, 

 which surround more or less completely the bases of the perithecia. Appendages fertile or sterile; the 

 latter simple, cylindrical, sometimes terminated by a beak-like cell: the fertile consisting of numerous 



