June, 1955 Curt: Oak Witt INocULA 307 
melanogaster, which, like the Nitidulidae, 1953, at least 40 species of insects belong- 
is attracted to mycelial mats of the oak ing to at least 33 genera of 19 families 
wilt fungus and to bleeding wounds on (exclusive of Collembola) were collected 
healthy oak trees, might be a vector of from mycelial mats on wilt-killed oak 
oak wilt. In the study reported here, trees in Illinois, tables 13 and 14. 
many other insects were found to be asso- Insects associated with mats are not 
ciated with naturally occurring fungus’ only potential vectors of oak wilt, but 
mats. From October, 1952, through July, they play other roles that affect the life 
\; Wi 
\, | 
” ngurnc iivotnningys 
re sone er 
ho a ain 
bite 
Fig. 16.—Insect activity on naturally occurring mycelial mats. 4. Adults of Glischrochilus 
obtusus and larvae of Carpophilus sp. have completely destroyed this mat. B. Bark beetle 
(Scolytidae) and freshly made hole in fungus mat. C. and D. Holes made through perithecium- 
bearing mat and pad on wood and bark by adults of the Scolytidae. 
