368 PROCEEDINGS OF THE ACADEMY OF [July, 



Canyon, but very little time was allowed for collecting. It is in the 

 midst of the pine ''glades," and, no town being located there, the few 

 specimens taken are typical of the park-like country on the top of 

 the Coconino plateau. The country was in general the same as that 

 outside the town of Williams. 



Grand Canyon of the Colorado, Coconino County, Arizona. Rim of 

 the Canyon at Bright Angel and 7iam7^/.— Elevation, 6,800-7,000 feet. 

 September 1 1 . Back from the edge of the canyon the country is rolling 

 and covered with a forest of pines, under which in most places there is 

 practically no vegetation or soil on the sheet of rock forming the top 

 layer of the plateau. 



In this country collecting was almost utterly without result, but 

 along the edge of the canyon, and for a short distance back from it, 

 better results were obtained. An area to the southeast of the hotel 

 was also found where there was some low vegetation under the pines 

 and in this situation Ageneotettix curtipennis and Amphitornus nanus 

 were taken. 



The Bright Angel TrazY.— Altitudes, 6,866 -2,436 feet. September 12. 

 For some distance on this trail the collecting proved to be much as at 

 the edge of the canyon, but farther down at about 5,850 feet the canyon 

 side became more open, a few junipers appeared and the open places 

 were filled with thickets and grasses. It was here (5,800-4,900 feet 

 ■elevation) that Melanoplus canonicus and Syrbula modesta were not 

 imcommon, but more or less difficult to capture owing to the extreme 

 steepness of the location. Farther down (elevation 4,350-3,900 feet) 

 in the grassy valley above the Indian Garden Spring, it was surprising 

 to note that, in spite of the difference of three thousand feet in elevation 

 and the more grassy country, practically the same forms as those 

 occurring at the top of the canyon were found. In the garden of the 

 Indian Spring House one Paratettix toltecus was taken. Diligent 

 search failed to disclose more than two specimens of Orthoptera on the 

 wide canyon mesa (3,700-3,800 feet) which was covered with a sage 

 and occasional patches of prickly pear. The Trimerotropis vinculata 

 was among sage, while the Paropomala perpallida was captured on the 

 very brink of the canyon precipice (elevation 3,750 feet) in a scant 

 bunch of a sort of wdre-grass. 



BLATTID^. 

 PEEIPLANETA Burmeister. 

 Teriplaneta amerioana (Linnsus). 



A female of this species was taken at Tucson, July 23, and a male at 

 Yuma, July 27, attracted to light in both cases. 



