42 THE AMERICAN NATURALIST. (VoL. XXXIII. 
(2) Average precipitation (inches): 
TATOOSH ISLAND. SEATTLE. KENNEWICK. 
january: ss 5: Stes 4.80 1.54 
February .-....- «.. - $.§0 3-41 0.42 
Mache mn eae O 3-42 0.30 
AD a oY T 4-01 0.39 
May oS Se ee 2.65 0.50 
TNO igs ee . 404 1.35 0.49 
Tatoosh Island has 233 cloudy days in the year, Seattle 159, 
and Kennewick 58. Of these localities, the first two belong to 
the excessively humid coast belt ; the third is east of the coast 
range and partakes more of the characters of the arid region. 
, It will be seen at once that the moist region has a compara- 
tively warm winter but a cool summer; the difference between 
the mean temperatures of January and June being from 13° to 
20° F. The inland region, on the other hand, has a colder 
winter climate, and a considerably hotter summer, with nearly 
50° difference between January and June. Comparing the 
average temperatures at Mesilla Park with these, we find that 
the first two months nearly agree with those at Seattle, the last 
four much more nearly with those at Kennewick. 
Yet the season at Seattle is ahead of that at Mesilla Park, 
so far as flowers and wild bees are concerned. Mr. T. Kincaid 
wrote me from thence on March 13, 1898: 
“The willows are now blooming, as well as several on 
plants, such as Rubus spectabilis, Nuttallia cerasiformis, Ribes 
sanguineum, etc. Only a few species of bees have appeared so 
far.” ; 
Mr. Kincaid sent me a series of Andrena perarmata Ckll., 
taken at Seattle on March 15 and 16; while Mr. Dunning 
(Canad. Entom., 1898, p. 269) reports Seattle specimens of this 
species taken from February 16 to March 14. Many other 
facts of this kind will doubtless be published by Mr. Kincaid, 
who is studying the bees of his region. 
I do not know when the bees first fly at Kennewick, but it 
is probably later than at Seattle, for the same reasons that 
affect the Mesilla Valley. 
So much for the facts; how do they affect the theory set 
forth at the beginning? 
