THAXTFR. — MONOGRAPH OF TIIF LAIiOI'LliKNIACK/E. 



myself being the same. Those on Encamps! poda I fijrlli Kol. belong (o . I . Encamps ipoda\ one of the speci- 

 mens here referred (o being the same examined by myself in the Berlin Museum. The other hosts men- 

 tioned, which arc European and may be assumed to have been infested by A. N ycteribia', al least in some 

 cases, arc as follows: N yet crib in Blasii Kol., from East Prussia, .V. rr.rata Wcslw., Austria; Pen ici/lidia 

 conspicna Spciscr, Servia and /'. Dufourii (Westw), Banat; but it is not impossible that two species may 

 have been confused here. The bosts are all wingless parasites of bats and do not appear to be very 

 commonly infested. I have myself examined the Nycteribidffl in the British Museum and in the Museums 

 at Merlin and Florence, as well as such scanty material as has been available in this country, but, with the 

 exception of the forms referred to seen at Berlin, no parasites were discovered. 



Arthrorhyncmus Nycteribi/E (Peyritsch) Thaxter, Plate XLVHI, figs. 7 10. 

 Thaxter, Proc. Am. Acad. Arts and Sci, Vol. XXXVI, p. 408, March, 1901. 

 Although the specimens obtained in the Berlin Museum from species of Nyclcribia (N. Frauenfcldii 

 Kol., No. 922 and N . Hermani Leabl., No. 850, both presumably from Europe) do not correspond in 

 all details with the figures given by Peyritsch, especially as regards the conformation of the pcrithecium, 

 it can hardly be doubted that they belong to the present species, the long free stalk-cell of the' appendage 

 being a character which is quite peculiar. The tip of the pcrithecium is four-lobed, the lobes short and 

 broad, like those of A. Encamps ipoda>; but are in turn conspicuously three-lobed. Reference has pre- 

 viously been made under the genus to Dr. Speiser's notes in regard to hosts of this species. 



Arthrorhynchus CyclopodivE Thaxter. Plate XLV1II, figs. 1-6. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVI, p. 407. March, 1901. 



Becoming tinged with brownish yellow except the hyaline stalk-cell of the pcrithecium. Perithccium 

 nearly straight and symmetrical, slightly inflated, usually distinctly constricted in the region of its very 

 small basal cells just above the very large hyaline stalk-cell, which may nearly equal it in length and 

 diameter and is often somewhat enlarged distally: the venter comprising the lower two-thirds, not clearly 

 distinguishable from the neck, which tapers slightly and almost symmetrically, the tip fairly well dis- 

 tinguished above a more or less distinct enlargement, from which it is separated by a slight constriction; 

 the apex consisting of a crown of four nearly symmetrical, distinctly tridentate, erect, or very slightly 

 divergent projections, which are subtended by a corresponding number of slight elevations, the middle 

 lobe of each projection more prominent than the lateral and like them bluntly rounded. Receptacle 

 consisting of two small cells, the lower twice as large as the upper, which gives rise distally to the stalk- 

 cell and bears the free appendage laterally; the foot an unmodified cell which penetrates the host, dividing 

 below into a very copiously branched system of slender, sinuous, rhizoidal hyphsc. Appendage consist- 

 ing of a dumb-bell-shaped, free stalk-cell, the basal half-rounded or flattened, brownish, somewhat larger 

 than the distal portion, which is deeper brown, flattened anil inflated, connected by a narrow hyaline 

 isthmus (the lumen of which may become almost obliterated) with the lower half, and mostly broader 

 than the base of the basal cell of the appendage, which is infertile, subrectangular, or somewhat inflated, 

 slightly longer than broad, the lower half of the walls becoming conspicuously modified by a progressive 

 thickening from above downward, the thickened portion deeper brown; the remaining cells of the append- 

 age three to four in number, brownish, successively smaller from below upward, giving the organ a 

 characteristically tapering habit; the two lowest of these cells usually relatively shorter, and bearing 

 each three to four antheridia side by side, distally and externally; those above relatively longer and nar- 

 rower and producing fewer antheridia, the terminal one spiniferous. Antheridia with slender curved 

 necks. Spores 00-05 X 4.5 /<. Perithecium: venter 325-350 X 70-90 //; the stalk-cell 220-250 X 75- 

 80 ft. Appendage, 100-110 p, the stalk-cell 35-40 X 30-35 p (the upper half X 2S-30 /«)• Receptacle 

 55-75 X 45-50 p. 



On the abdomen of Cyclopodia macnira Speiser. New Pomerania. Berlin Museum, No. 854, 

 (Dr. Dahl). 



