6 4 
Psyche 
[March 
Adults have been collected from April through August. 
I have seen the following material : 
United States. California. El Dorado County. Emigrant Gap, 
v, i, CAS. Lake Tahoe, vii, 28, FMNH, USMN. Tahoe City, 2, 
CAS. Modoc County. Cedar Creek, E slope Cedar Pass, 5300 feet, 
viii, 3, CAS. Napa County. No other data, 12, CAS. Santa Clara 
County. San Jose, iv, 1, CAS. Shasta County. Burney Falls, vi, 2, 
CAS. Siskiyou County. Shasta Retreat, 2416 feet, vii, 1, CAS. 
Sisson, vii, 8, CAS, CNC, MCZ, USNM. No other locality data, 
vii, 20, CAS, FMNH, MCZ, USNM. Stanislaus County. Adobe 
Creek, 22 mi W Patterson, iv, 3, CAS. Trinity County. Butler 
Creek, 12 mi SE Hyampom, 3450 feet, in aggregation with Stenus 
under loose bark of Abies log by creek, vii, 130, CAS. 
Idaho. Latah County. Moscow, Cedar Mt., v, 2, MCZ. County 
unknown. Willow Flat, Cub River Canyon, Wasatch Mts., 1, 
FMNH. 
Oregon. Baker 'County. Pine Creek, near Baker, on debris partly 
in swift stream, vi, 16, FMNH. Klamath County. 6 mi S Ft. 
Klamath, Crooked Creek, treading creek-side grass, vi, 9, CNC. 9 mi 
NE Bly, Deming Creek, 50005800 feet, treading moss under Alders, 
vi, 8, CNC. Umatilla County. Meacham, v, 13, USNM. 
Washington. Whitman County. Palouse, x, 2, MCX. Walla 
Walla County (?). Kooskoosie, vi, 1, USNM. 
Hatch (1957: 53) adds the following localities from which I 
have not seen material: Idaho; Deary, Elk River, and Franklin 
County. As noted above, these and other localities of Hatch were 
listed under the name B. varicornis, not calif ornicus. In discussing 
this species, Hammond (1971: 68) gives east Wisconsin as part of 
the range, but this is a misinterpretation of the symbol “e Wn.” 
used by Hatch to signify eastern Washington. 
Zoogeographic Considerations. 
The distribution of the genus is disjunct, occurring in Japan and 
temperate North America. This is not an uncommon distribution 
disjunction. It is shown in many plant genera (Li, 1952), is gen- 
eralized as an Asian-American distribution type by Thorne (1972), 
and, except for the presence of B. calif ornicus, is an example of the 
east Asian-eastern North American disjunct pattern of Darlington 
(1957: 417), based on vertebrates. From my observations, and data 
provided by Hammond on B. oculatus Lewis of Japan, I suggest the 
following distributional-evolutionary history. 
