247 
OHSGOH 
This is the first year that collections from Oregon were included 
in this project. The natural vegetation areas found in this State arc the 
northern desert shrub in the eastern half and the western pine forest in 
the western half. There were 1,095 specimens collected in 4 environments 
in which 13 species arc represented. Hcla.no plus ncxicanus was the dominant 
species hy far, except in the marsh-meadow land, where C a nnul a pellucida 
was dominant. M. foe'dus ifoedus was third in numbers. 
Hatching began late in May ahd continued through June. Infestations 
are of LI. msxicanus and Cannula pellu cida and occur in widely separated 
areas. C. pellucida on the Klamath Marsh has been greatly reduced by the 
control campaign. This is the area where this species reaches its greatest 
numbers. 
