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PACIFIC SCIENCE, Vol. XVII, July 1963 
Fig. 3. Dorsal views of thoracic segments 6, 7, and 
8, and abdominal segments 1, 2, and 3, showing two 
variants of each pigmentation pattern: calif orniana- 
like group — O calif orniana; b, O. Columbiana; c, 
O. benedicti — corniculata-\ike group: d, O. cornicu- 
lata; e, O. pugettensis. 
niculata-Yike but are more commonly bluish or 
brownish rather than salmon-pink. The anten- 
nae of benedicti are proportionally the shortest 
of the genus but are shaped like those of cornic- 
ulata. 
The longest males I have measured (see above 
for the reference points) are: O. calif orniana, 
26.0 mm; O. corniculata, 25.0 mm; O. Colum- 
biana, 19.0 mm; O. pugettensis, 15.5 mm; and 
O. benedicti, 10.0 mm. The females are a few 
millimeters shorter. 
Because of exceptions to the above general 
statements about antennae, one finds that with 
subadult individuals, females, and indeed even 
mature males from some beaches, other obvious 
