1966] 
Nutting — Dry-wood termite 
177 
Figure 4. A. Longitudinal section through a copularium of Pterotermes 
occidentis in outer wood of a dead palo verde tree. This chamber contained 
a primary pair and four small nymphs. B. Longitudinal section showing 
the galleries of Pterotermes in a dead palo verde from the vicinity of Oracle 
Jet., Arizona. Cross sections 1-9 represent tracings of the galleries in ad- 
jacent cuts. 
temperature rarely fell below 24°C in the early morning shortly after 
sunrise during the entire period. This tree received somewhat more 
than 50 percent shade for most of the day and complete shade early 
and late each day. Since colonies in nature are rarely in such shaded 
situations, these figures are certainly conservative. Further, for most 
colonies in branches and trunks from one to ten inches in diameter, 
there is no apparent escape from such temperatures. 
Association with other termites and insects. In southern 
Arizona, Marginitermes hubbardi (Banks) has been found in palo 
