Snell: A New Septobasidium on Pinus Strobus 57 



entomogenous relation is suggested not only by this fact, but also 

 by its manner of growth and the common occurrence of a scale 

 insect upon the pine. Cursory observations show that such a rela- 

 tion exists. If a fruit body is carefully separated from the pine 

 bark, the remains of the scale insects can readily be seen on the 

 lower surface or on the pine bark, either as brown skeletons or 

 cases, or white-lined pockets in which the insects were inclosed 

 (Plate 12, fig. i). If small fruit bodies 2-3 mm. large are exam- 

 ined, the white bodies of the insects are easily made out imbedded 

 in the hyphae, and examination of these under the microscope 

 leaves no doubt as to their identity or their relation of the fungus 

 to them. The insects are overgrown and intergrown with my- 

 celium of the fungus, which can be determined to be within their 

 bodies (Plate 12, fig. 2) . The hyphae in the youngest insects were 

 hyaline (see fig. 2) and on the older ones were dark like that of 

 the context. 



The fructifications are more or less ashy colored and are con- 

 spicuous against the greenish bark of the pine. In structure S. 

 pinicola differs from most of the species of Septobasidium de- 

 scribed, inasmuch as the plainly 3-layered condition discernible in 

 most of them is not present (Plate 13, fig. 1). There is more or 

 less of a matting of the dark hyphae close to the substrate, but it 

 is irregular and lacunar much as is the substance above it. The 

 remainder of the context is made up of loosely intertwined hyphae 

 running obliquely upward, leaving empty locules and giving the 

 whole a spongy appearance. The hymenium is formed by branch- 

 ing of these hyphae which form the hyaline probasidia, being thus 

 lighter in color than the rest of the structure. The subglobose to 

 pyriform probasidia, both at and below the surface, germinate to 

 form straight, hyaline, three-celled spore-bearing organs. Stages 

 in the germination of the probasidia are shown in plate 13, figure 

 2. The spores are born singly from each of the three cells, and, 

 as far as could be determined, in succession and acropetally. Fig- 

 ure 3 of plate 13 shows this very well. This is in line with Burt's 

 observations with the other species (1, pp. 319-20). 



