74 MISSOURI BOTANICAL GARDEN. 



the other species of Ceratostomella studied. The peri- 

 thecia are globose, varying from 90/* to 200//. in diameter, 

 and averaging 120/t. The lengthened beak measures from 

 .9 to 2 mm. in length, and 10/t to 30/* in diameter, aver- 

 aging 1.5 mm. by 25/t. Some of the necks, in addition to 

 the ring of bristles ordinarilv found at the terminus of the 

 beaked ostiolum, have one or two whorls at some distance 

 below the end (pi. 3, f. 7). This character has never 

 been noted in cultures of C. pilifera. The terminal 

 bristles are tapering and average 20/t in length by 2/t in 

 width. The asci have not been measured. The ascospores 

 are reniform in shape, hyaline, and measure 4/t to 5/t in 

 length, and 1.5/t to 1.7/t in width, averaging 4.5/a by 1.5/t 

 (pi. 5, f. 2). 



This species penetrates pine wood when inoculations are 

 made, nearly as readily as C . pilifera. The mycelium in 

 the wood cells follows the medullary rays in pine wood, 

 but in red gum wood it penetrates also numerous tracheary 

 vessels, and sometimes the wood fibres. It is most abun- 

 dant, however, in the medullary rays of the latter wood. 



Ceratostomella minor, n. sp. 



During the year 1905 some specimens of pine wood 

 stained with a dark blue color, from Pinus Arizonica Eng., 

 were received from Dr. A. D. Hopkins. From these there 

 were isolated two species of wood-staining fungi; one 

 a species of Ceratostomella, the other a Graphium. The 

 Ceratostomella proved to be smaller than the species from 

 Pinus Virginiana, and differed in other points. The fun- 

 gus gained entrance through the galleries of wood beetles, 

 the stain radiating from cavities made by these insects. 

 When grown in pure culture the fungus possessed conidia 

 and ascospores. As the specific characters do not agree 

 with any previous description of Ceratostomella, the name 



