Murrill: Boletaceae of North America 145 



distinct, C. Betula having a smooth, perfectly glabrous, viscid, 

 shining testaceous cap, while that of C. Russellii is dry and 

 tomentose. 



3. Ceriomyces albellus (Peck) 



Boletus albellus Peck, Ann. Rep. N. Y. State Mus. 41 : 77. 1888. 



Described from Sandlake, New York, and also found in decid- 

 uous woods in Pennsylvania, District of Columbia, Virginia, West 

 Virginia and Tennessee. The color of the cap, which is white or 

 whitish, should at once distinguish it from nearly all other species 

 of boleti. 



4. Ceriomyces frustulosus (Peck) 



Boletus frustulosus Peck, Bull. Torrey Club 24: 146. 1897 



Described from specimens collected in open ground and on clay 

 banks at Ocean Springs, Mississippi, and at Akron, Alabama, by 

 L. M. Underwood. The deep chinks in the cap are very con- 

 spicuous in the type specimens. Young specimens recently col- 

 lected in Mississippi by Mrs. Earle and in the District of Colum- 

 bia by myself are doubtfully referred to this species, but they 

 show the frustulose character very slightly. 



5. Ceriomyces griseus (Frost) 



Boletus griseus Frost; Peck, Ann. Rep. N. Y. State Mus. 29: 45. 

 1878. 



? Boletus flexuosipes Peck, Bull. N. Y. State Mus. 2 : 130. 1889. 

 (Type from North Carolina.) 



Described from specimens collected by Peck at Sandlake, New 

 York. It occurs in open woods from New England to North 

 Carolina, and is distinguished from C. retipes, to which it is very 

 closely related, by its pure white tubes, those of C. retipes being 

 decidedly yellow. The cap is gray and the stem usually whitish. 



6. Ceriomyces chromapes (Frost) 



Boletus chromapes Frost, Bull. Buffalo Soc. Nat. Hist. 2 : 105. 

 1874. 



A very attractive species, and one easily recognized by its stem, 

 which is bright yellow near the base and finely scabrous over its 

 entire surface. The cap is' pale red and the tubes and most of 



