266 PROCEEDINGS OF THE AMERICAN ACADEMY 



I am indebted to the kindness of Mr. Coquillet for sending me tvfo 

 specimens of Chilocorus bearing this parasite upon the legs and ven- 

 tral surface of the abdomen, on which it is conspicuous from its large 

 size and contrasting color. 



Peyritschiella MINIMA nov. sp. 



Hyaline or slightly yellowish, Perithecia large, tapering slightly 

 to a blunt, 4-papillate, symmetrical apex. Paraphyses sometimes 

 brownish, of two or three rounded joints : on the inner side, in sets 

 of (typically) three each in a transverse row, surmounting prominent, 

 slightly overlapping projections from three successive cells placed one 

 above the other, the lowest being the third above the basal cell of the 

 receptacle. On the outer side, above the sharp projection characteristic 

 of the genus, and external to the base of the perithecium, are usually 

 three more similar pseudoparaphyses. Receptacle short, stout, sub- 

 triangular, of twelve or more cells ; the small basal cell being the 

 only one which is single. Spores of usual type 37-40 X 4 /a. Peri- 

 thecia 100 X 33 /A. Paraphyses, maximum 35 yu,. Total length to 

 tip of perithecium 190/*; maximum 220 jx. Receptacle 90-110 X 

 50-58 yu. 



On Platynus cincticollis. Connecticut. 



A very distinct and minute species, hardly visible with a band 

 lens, growing singly on the extremities of its host. The peculiar 

 sharp process, also present in P. curvata, does not project laterally 

 beyond the receptacle, as in the last named species, and is therefore 

 visible only when the receptacle is so placed that its inner side lies 

 to the left. Single perithecia only were observed in the seven speci- 

 mens which constitute the types, although more than one may be 

 found to occur, as is very rarely the case in P. curvata. Without refer- 

 ence to other points of difference it is at once separable from P. curvata 

 in having no single supra-basal cell, the receptacle becoming multi- 

 cellular immediately above the basal cell ; a circumstance which ren- 

 ders necessary a modification of the generic diagnosis previously given, 

 in which the supra-basal cell is described as single. 



Laboulbenia Casnoni^ nov. sp. 



Evenly pale olivaceous. Perithecium rather long, with a black 

 patch below the apex on the inner side : apex hyaline, slightly oblique 

 outwards. Pseudoparaphyses hyaline, olivaceous near the base : the 

 outer simple, nearly straight, slightly divergent: the inner consisting 

 of a small basal cell from which arise several branches, which may ia 



