18 
LORQUINIA 
peculiar and striking departure from the normal is well shown in the 
plate published by the late Beverly I^etcher in Entomological News, 
IX, page 38, plate 1898, and is enough to suggest an aberration or 
sport ; but its rather frequent occurrence and capture in the same haunts 
as typical cary^ae suggests that it is another form of variation of more 
significence to students of evolution, but what kind of variation is 
hardly guessed at as yet. It is not a seasonal form, as suggested by 
Letcher and other collectors, as it is taken at different times through 
the year. 
I have seven specimens taken during 191 5 by different boys about 
L/OS Angeles, and they are alike in general. In one specimen the row 
of white spots on the hind wing is very well marked and with wide, 
black, heavy rings; while in another these white spots are much smaller 
and with no black rings. The other specimens are intermediate but 
incline towards the latter form in appearance. 
Muelleri is more variable than typical caryae, but it varies within 
comparatively well defined limits. This variation will be worth watch- 
ing in the future. 
FORDYCE GRINNELL, JR., 
Pasadena, Cal. 
THE GENUS QUERCUS IN CALIFORNIA 
There are approximately 300 species of the genus Quercus dis- 
tributed in various parts of the world, not including the many hybrids 
and horticultural varieties. Of this number about 53 are indigenous 
to the United States, and of these nature has favored California with 
nearly one-third. The following is a brief list of the representatives 
found in California : 
QuKRCUS LOBATA, Nee (Valley Oak). This is perhaps the largest 
of our California oaks, sometimes reaching a height of one hundred 
feet or more. This species may be found growing in rich loamy soil, 
but is smaller out of the valleys in poorer soils. It occurs most frequently 
in the interior plains and valleys of the coast ranges — Tehachepi Val- 
ley, Antelope Valley, etc., its southern most limits seeming to be Santa 
Monica and Lamanda Park. It is abundant in the Sacramento Valley 
and widely distributed in Northern California. 
