CHITONOMYCES AND RICKIA. 17 



In triseriate forms the middle series is called median, the lateral series 

 on the perithecial side anterior, while the other is called posterior. It 

 should be mentioned also, that the cell-numbers in the different cell- 

 series may vary, even in the so-called "determinate" receptacles; 

 being often less numerous in small and depauperate individuals or 

 more numerous in those which are more luxuriantly developed, al- 

 though the average number is usually uniform. 



Rickia Passalina nov. sp. 



Wholly hyaline. Axis indeterminate, slender, elongate, simple or 

 once to several times variably branched; the cells of the receptacle 

 biseriate above the single basal cell, mostly several times longer than 

 broad, shorter and somewhat broader immediately below the peri- 

 thecium; the cells of both rows, more often every second cell, cutting 

 off a small appendiculate cell distally and externally, which is separated 

 from the appendage by the usual, though not very conspicuous, 

 blackish septum; the appendages four or five times as long as broad, 

 for the most part appressed or but slightly divergent, those near the 

 perithecia usually somewhat stouter and longer: the slightly tapering 

 base of the primary appendage projecting distally and externally from 

 the second cell of the anterior series, and consisting of a large basal 

 and much smaller distal cell which is separated from the short append- 

 age by a blackened constricted septum. Perithecia terminating the 

 primary and secondary axes, rather long and narrow; the anterior 

 margin free nearly to the base; the posterior united throughout to 

 the last five cells of the posterior cell -series of the receptacle, all of 

 which are without appendages, with the exception of the last, which 

 bears one terminally just below the free apex of the perithecium, the 

 body of which is slightly and subsymmetrically inflated; the tip 

 externally or laterally geniculate, being bent abruptly sidewise or 

 inward; the apex slightly recurved, tongue like, subtended by a 

 prominent elevation. Spores about 20 X 2.5 m- Perithecia 40 X 10 ^t. 

 Total length of axis varying from about 150 to 900 /x, its width 8-12 ix. 

 Appendages 9-12 X 2.5 n. 



On Passalus cornuius Fabr. (Type), M. C. Z., No. 2172, Ganard Co., 

 Kentucky (Hyatt). On passaline beetles of various genera and 

 species from: Para and Manaos, Brazil, Nos. 2215 and 2235, 2223, 

 M. C. Z. (Mann); Grande Etang, Grenada, B. W. I., No. 2069; 

 Dominica (Laudet), No. 2170, M. C. Z.; No 2169, M. C. Z., Polvon, 

 Nicaragua; No. 2163, and 2161, Guatemala, both in M. C. Z. 



