152 
Psyche 
[September 
TABLE ONE 
Cephalonomia perpusilla: numbers of each form arranged by locality 
Zone Locality 
Alate 
Apter- 
Alate 
Microp- 
Subap- 
Apter- 
Total 
ous 
terous 
terous 
ous 
$ $ 
$ $ 
$'9 
$ $ 
$ $ 
$ $ 
D 
CALIFORNIA 
Plumas Co., Twain 
Plumas Co., Canyon 
1 
2 
6 
0 
0 
0 
9 
Dam 
2 
7 
15 
0 
0 
30 
54 
Eldorado Co. 
0 
0 
1 
0 
0 
1 
2 
B 
OREGON 
Douglas Co. 
CALIFORNIA 
0 
0 
1 
0 
2 
0 
3 
Mendocino Co. 
0 
0 
0 
0 
1 
- 0 
1 
Marin Co. 
0 
0 
2 
0 
5 
0 
7 
Contra Costa Co. 
0 
0 
1 
0 
1 
0 
2 
Fresno Co. 
0 
0 
0 
0 
1 
0 
1 
A 
CALIFORNIA 
Alameda Co. 
0 
0 
0 
5 
0 
0 
5 
Santa Clara Co. 
0 
0 
0 
1 
0 
0 
1 
Santa Cruz Co. 
0 
0 
0 
2 
0 
0 
2 
C 
ARIZONA 
Rustler Park 
0 
1 
1 
0 
3 
1 
6 
Portal & vicinity 
3 
1 
8 
0 
4 
6 
22 
Douglas 
0 
1 
0 
0 
2 
0 
3 
D 1 
BAJA CALIFORNIA 
San Jose Island 
4 
14 
3 
0 
0 
4 
25 
Cerralvo Island 
0 
0 
1 
0 
0 
13 
14 
El Triunfo 
NAYARIT 
1 
30 
0 
0 
0 
37 
68 
San Bias 
7 
6 
3 
0 
0 
8 
24 
TOTALS 
18 
62 
42 
8 
19 
100 
249 
cases extremely narrow-headed). However, samples from any one 
locality do not in any case contain all six forms. Males appear 
dimorphic throughout the range, but the females appear to show 
geographic variation in morphism (Table I). This unusual situation 
is discussed further following the description of the six forms. 
Cephalonomia perpusilla new species 
Holotype. — c? (macropterous) , Twain, Plumas Co., Calif., 6 
Nov. i960 (J. F. Lawrence, no. 720, ex Polyporus versicolor on Acer 
sp.). 
Paratypes with the following data (see Table I for numbers of each 
sex and form from each locality). — OREGON: 10 mi. SW Camas 
Valley, Douglas Co., 24 Oct. 1962 (JFL, no. 1126, ex Polyporus 
adustus) . CALIFORNIA: Mendocino Co., 2 mi. N Piercy, 26 Oct. 
1962 (JFL, no. 1 13 1, ex Polyporus versicolor) ; Plumas Co., Twain, 
6 Nov. i960 (JFL, no. 120, ex Polyporus versicolor) ; Plumas Co., 
Canyon Dam, 6 Sept, i960 (JFL, no. 713, ex Fomes pinicola) ; 
