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Psyche 
[Vol. 94 
the putative range of P. owyheei at a site 3 miles southeast of Row- 
land, Nevada; at Bridgeport, California; and at several localities in 
Washington County, Utah. This would indicate that P. salinus 
extends north into central Oregon (Lake and Deschutes counties) 
with small populations farther north and east, while P. owyheei has 
populations in eastern California (Lassen and Mono counties) and 
southwestern Utah (Washington County). 
The second inconsistency involves specimens determined by Cole. 
Numerous specimens with Scape state 1 were determined as P. owy- 
heei by Cole. These were collected in Nevada (Elko and Washoe 
counties), Oregon (Harney and Umatilla counties), and Wyoming 
(Big Horn County). Scape state 5 was found in two nest series 
determined as P. salinus by Cole from northern California (11.5 
miles south of Termo and 18 miles south of Ravendale, Lassen 
County). These determinations show that Cole either allowed con- 
siderable variation in this character, or utilized other characters 
(alone or in combination) to identify these forms. 
The P. montanus collections show no geographic variation in this 
character. 
Scape Index (SI) 
The SI of P. occidentalis varies from 65 to 78, with a mean of 
66.9. It shows a weak cline, with low values in the eastern part of the 
range (Colorado, Kansas) and high values in the western portions 
(Utah, Nevada) (Fig. 35). 
Cole (1968) found the SI of P. owyheei to vary from 83.0 to 100.0, 
while that of P. salinus varied between 83.5 and 84.0. A random 
sample of material determined by Cole (from LACM) was mea- 
sured, and the SI varied from 69.0 to 79.0 (mean = 73.8, sd. = 2.20, 
n = 32) in P. owyheei and 70.0 to 84.0 (mean = 76.1, sd. = 3.18, 
n = 33) in P. salinus. The discrepancy between these measurements 
and those of Cole (1968) may be caused by differences in measure- 
ment techniques. Cole’s range of SI values was greater for P. 
owyheei than for P. salinus, while material now available shows the 
opposite. This may be due to a small sample of P. salinus in Cole’s 
study. Although the broad overlap in the ranges of SI values makes 
this character of little value in discriminating the taxa, the means are 
significantly different (t = 3.35, p = 0.0014). 
