58 
Psyche 
[June 
W. M. Wheeler; 8 miles north of Casa Grande (1500') ; 
5 miles east of Aguila (2200') ; 20 miles east of Gila 
Bend (2700') ; Organpipe Cactus National Monument, 
Headquarters (1600'), Dripping Spring (1700'), Abra 
Wash (1300'), Quitobaquito (900'); Tucson (2400') 
Type Locality W. M. Wheeler; Bowie (3750') W. M. 
Wheeler; Continental (2900') no collector. 
Sonora: 10 miles south of Sonoyta (1400') ; 5 miles south 
of Santa Ana (2500') ; Puerto Gonzalitos (2500') ; 10 
miles south of Hermosillo (700') ; 33 miles north of 
Guaymas (500') ; 15 miles north of Guaymas (100') ; 
5 miles south of Peon (sea level). 
I have omitted from this list the extraordinary record 
for pima carried by Olsen (2) in his 1934 study of Pogo- 
nomyrmex. Among the Arizona stations Olsen gave “Mt. 
Lemmon, South Catalina Mts., 8000-9150 feet.” Mt. Lem- 
mon is the main peak in the Santa Catalina Mountains 
just north of Tucson and has a height of 9185 feet. The 
writer has collected there on several occasions and can 
state that there is scant likelihood that pima could occur 
above the 3000 foot level. That it could live above the 
8000 foot level is out of the question. Above 8000 feet 
Mt. Lemmon supports a fairly heavy stand of conifers. 
At its higher levels Mt. Lemmon is certainly not the 
place where one would expect to find a strict xerophile 
such as pima. It is possible that the specimens on which 
Olsen’s record was based were winged forms, carried by 
updrafts to the crest of Mt. Lemmon. But if they were 
workers it is evident that the specimens were incorrectly 
labelled as far as elevation is concerned. It also seems 
probable that the record from Bowie, attributed by Olsen 
to pima, is actually imberbiculus. As may be seen from 
the foregoing list, all other records for pima come from 
stations below 3000 feet and well to the west of the latitude 
of Bowie. 
By comparing the locality lists for imberbiculus and 
pima it is easy to appreciate that the former species 
is decidedly more adaptable. The lateral range of imber - 
