176 PROCEEDINGS OF THE AMERICAN ACADEMY 



the receptacle, densely clustered, the lower segments nearly hyaline, 

 oval or rounded, with black septa, the ultimate branches cylindrical, 

 hyaline, strongly curved towards and beyond the perithecium. Recep- 

 tacle very short and stout, the basal cell curved and hyaline. Spores 

 40 X 3.5 jLi. Perithecia 80 X 40-48 /*. Appendages (longest) 75 /x. 

 Total length to tip of perithecia 145-150 fx. 



On elytra and legs of Calleida pallidipennis Chaud., Panama. 



The smallest known species of the genus belonging to the luxuri- 

 ans type. 



Laboulbenia Guerinii, Robin. 



A form occurring on Gyretes compressus Lee. and G. sinuatus Lee, 

 from Illinois and Texas, seems identical with the species figured by 

 Robin, though somewhat smaller. 



Laboulbenia anceps, Peyr. 



A form common on Platynus extensicollis and several other species 

 of the genus seems referable to this species, and is not separable from 

 specimens found on Anchomenus (^Platynus) albipes, from Austria. 

 It is subject to considerable variation, and is perhaps too near 

 L. elongata and L. Hougetii. 



ACANTHOMYCES, Thaxter. 



Several additional species of this genus correspond strictly to the 

 type previously described, except that additional material shows the 

 occasional production of two perithecia usually accompanied by a 

 corresponding elongation of the receptacle. 



Acanthomyces longissimus, nov. sp. 



Perithecium brown, darker at the blunt apex, slightly inflated, its 

 two lower thirds almost completely surrounded by a series of appen- 

 dages arising from its base. Receptacle very long and slender, slightly 

 flexuous, its main axis consisting of about thirty superposed cells 

 deeply suffused with blackish brown, lighter at the septa. Appen- 

 dages very numerous, externally opaque, internally more or less 

 hyaline, short, slender, straight, appressed ; a few curved, projecting 

 outwards on either side in successive pairs. Spores 60 X 4 /x. Peri- 

 thecium 185 X 55 fi. Appendages about 110 fx long, those at the 

 base of the perithecium about 165 fx. Receptacle slightly exceeding a 

 millimeter in length by 30 /^ broad. 



On elytra of Colpodes evanescens Bates, Guatemala. 



