440 Agricultural Experiment Station, Ithaca, N. Y. 



ill size. These patches are distributed irregularly over the head and 

 ventral side of the body. The spherical conidia are borne in spheri- 

 cal heads on the sides of the long slender mycelial threads. This 

 species seems to be the original Sjyorotrichuin glohuUferum\ which 

 was first found on Carabidae, and which appeared as in this case in 

 patches on the surface and not in a dense felt as in the case of sev- 

 eral other Sporotrichums hitherto identitied as ylobiiliferum. 



A dilution culture was made in the usual way, and the foUowing^ 

 habit of growth observed : after one day the conidia become swollen 

 and one or more germ-tubes are developed. These germ-tubes are 

 strongly constricted at the base. The protoplasm is hyaline. In 

 two days the threads become somevv'hat branched, with the branches 

 also constricted at the base. Some vacuoles appear about this time. 

 In three days cylindrical conidia are thrown off in the agar from the 

 terminations of slender threads (Fig. 82). In about four days after 

 sowing, the threads appear above the agar, forming radiate colonies 

 which continue to enlarge until, at the end of a week, the colonies 

 are 2 mm. in diameter, and strongly elevated, some being almost 

 hemispherical. After this an even, loose growth usually spreads 

 over the entire surface, connecting the colonies. On about the 

 eighth day the threads become swollen and in many cases the pro- 

 toplasm becomes concentrated in certain parts, leaving the other 

 parts empty (Fig. 87 and 88). On about the thirteenth day the 

 parts containing protoplasm germinate. They put out long slender 

 tubes which grow as ordinary germ-tubes and produce cylindrical 

 spores in the agar, as in the case of ordinary threads from aerial 

 conidia. Sometimes a pair of spores will be produced and the parent 

 thread will lengthen and leave these behind, producing another 

 pair beyond. The protoplasm in these segments is nearly homo- 

 geneous, the walls being somewhat thickened. This shows how 

 segments of mycelium may function as conidia, and suggests how 

 the hyphal bodies of Gordyceps clavulata may be produced. After 

 about four days from the sowing, conidia are borne outside of the 

 agar. The sterigmata are terminal or sessile on the ends of short 

 branches. The sterigmata are tipped with small spherical conidia 

 (Figs. 84, 85, 80 and 90). The multiphcation of these sterigmata 

 and conidia results in a more or less compact liead, spherical in 

 form (Fig. 83). 



* Bull. No. 38. Ag. Exp. Sta. Uuiv. of 111., p. 33. Mar. 1895. 

 t Speg. Fungi. Argeut. Pug., II. p. 42. 



