94 College of Forestry 
spring.” Smith (1909, p. 359) has taken it “ Under bark 
of trees, among rubbish in barns and outbuildings.” Blatch- 
ley (1910, p. 1251) speaks of it as “‘ Common beneath bark.” 
It will be seen from the above references that no definite 
statements regarding the breeding habits or food habits of 
this beetle was found in the literature. It apparently is not 
known whether it breeds under bark or whether it merely 
hibernates there. The fact that the adults are taken con- 
stantly in the spring or early summer from under bark does 
not afford evidence to support either view. Nor does the 
fact that it has been taken from a variety of different species 
of tree offer any real evidence — it being a well-known fact 
that insect inhabitants of wood well along in decay, usually 
show little preference for any particular species. The evi- 
dence we have to offer is quite scant and inconclusive, but 
it points toward T. tenebriodes being a true inhabitant of 
decaying wood throughout its life. The material (Tree V) 
was confined in breeding cages late in April and the adult 
beetle did not appear in the cage until July 7. Had it been 
merely hibernating in the wood, it would likely have been 
found earlier. 
The material from which 7’. tenebriodes was derived con- 
sisted of the decayed heartwood of Tree V which had been 
peeled many years ago (Figs. 29, 30). This exposed wood 
had at one time apparently served as the breeding place of 
S. barbatus which, however, had emerged a number of years 
before the material was confined in the cage. Two other 
insects were taken from this wood — Adelocera brevicornis 
(taken from the wood in the field April 28) and Dryoph- 
thorus americanus (July 3). A. moestum, P. dimidiatus 
and S. barbatus were bred from this same tree but emerged 
from the sounder more recently killed portion. 
Adelocera brevicornis [LeConte 
Adelocera brevicornis is perhaps distributed over the 
greater part of eastern United States and Canada. Adams 
(1909, p. 196) gives the geographical range as Ottawa, 
Canada; Michigan; Lake Superior. Smith (1909, p. 284) 
