Natural Sciences of Philadelphia 
4 * 
The Pajaritos were our most productive section in the Nogales 
region. They are a jumbled group of relatively high jagged peaks 
and pinnacles, as well as many lower ridges, largely covered with 
oak groves, and as a whole an extremely interesting and diversified 
territory to study. Our most striking results were a genus of grass¬ 
hoppers previously unknown from north of central Mexico, and the 
previously unsecured adults of one of our rarest and most imper¬ 
fectly known genera of the same family, while numerous other very 
desirable species were secured. 
The Patagonia Mountains were not as interesting as the Pajaritos, 
although we examined a number of environments, extending to the 
highest levels. The range is by no means as broken as the Pa¬ 
jaritos, with more long grassy stretches on the south-facing slopes, 
and the oak cover more restricted to the north-facing slopes. The 
localities examined nearer Nogales were quite productive—-grassy 
slopes, mesquite flats and groves of huge cottonwoods along the 
river bottom. 
From Nogales we moved eastward, following the boundary line 
quite closely, working at Fairbanks, Naco, Osborn, Douglas and 
San Bernardino Ranch, all in Arizona. From Naco we made a 
side trip to Don Luis, at the foot of the Mule Mountains, then 
through the copper town of Bisbee to Mule Pass in the same 
mountains. From Mule Pass we climbed to two nearby summits, 
reaching about seven thousand two hundred feet elevation. At 
Don Luis we found a foot hill element in the Orthoptera which 
was absent from the flat at Naco, although weakly indicated in the 
limestone hills at Osborn about six miles away. The higher Mule 
Mountains were not markedly productive or interesting to us, 
probably because the range is not high enough to carry boreal 
conditions, yet the upper slopes are too cold for more typically 
south Arizonan types. 
The name of San Bernardino Ranch is a familiar one in distribu¬ 
tional entomology, as Prof. Snow of the University of Kansas 
spent most of a summer there some fifteen years ago, and his 
collections made at that locality have been studied by many 
students. Our visit was made to secure additional information 
and material, and we were very successful. San Bernardino Ranch 
lies over twenty miles east of Douglas, across the low Perilla Moun¬ 
tains, and at the lowest level, in the United States, of the San 
