ISARIA. 447 



* On insects. 



Isaria farinosa. Fr. (fig. 31, p. 397.) 



Subcaespitose ; white, 1 in. or more high, stem distinct, 

 simple, glabrous, fertile, upper portion thickened, more or 

 less branched, powdery ; conidia globose, hyaline, 2 /A 

 diameter. 



Isaria farinosa, Fries, Syst. Myc., iii. p. 271 ; Sacc., Syll., 

 iv. n. 2772. 



On dead, putrescent chrysalis form of various insects, 

 especially those buried amongst fallen leaves. 



The conidial condition of Cordyceps militaris. 



Isaria floccosa. Fr. 



Caespitose ; subulate, simple, white, 2-4 mm. high, 

 everywhere floccoso-tomentose ; conidia subglobose, 2 p 

 diameter. 



Isaria floccosa, Fries, Syst. Myc., iii. p. 274 ; Sacc., Syll., 

 iv. n. 2778. 



On larvae and pupae of Bombyx Jacobaea. 



Isaria sphingum. Schw. 



Gregarious; stromata erect, very long, filiform, often 

 compressed, subpulverulent, springing, from a silky fibroso- 

 crustaceous mycelium ; conidia subglobose, 2 //, diameter. 



Isaria sphingum, Schweinitz, Syn. Fung. Carol., p. 126, 

 n. 1298 ; Sacc., Syll., iv. n. 2781. 



On the pupa of a dipterous insect in Scotland. In other 

 countries on Sphingum and various Orthopterous and Lepi- 

 dopterous insects. 



The ascigerous form, Cordyceps sphingum, Sacc., has not yet 

 been recorded for this country. 



Isaria arachnophila. Ditm. 



Caespitose, springing from a whitish stroma, cylindrical, 

 unbranched, white or with a suggestion of pink; conidia 

 linear-oblong, 3-4 x 2 p.. 



Isaria arachnophila, Ditm. in Sturm, D. C. Fl., t. 55 ; Sacc., 

 Syll., iv. n. 2791. 



On various spiders. 



