112 PROCEEDINGS OF THE ACADEMY OF [Feb., 



of from 5,000 to 7,000 feet. The latter were ascended to the summit 

 of the South Peak, altitude about 5,600 feet, and found to be 

 desert to that height. The slopes of this range are covered more or 

 less uniformly on the lower section with greasewood, while the higher 

 portions are sparsely covered with aloes and other desert species. They 

 were very productive of Orthoptera, Syrbula fuscovittata, Bootettix 

 argentatus, Diapheromera covillece, Pseudosermyle tenuis, Mermiria 

 iexana, Arphia teporata and others being taken. 



On the mesa and at the foot of the same the greasewood yielded, 

 among others, Diapheromera covilleo3, Bootettix argentatus, Melanoplus 

 bowditchi, M. herbaceus, Ateloplus macroscelus and Litaneidria skinneri, 

 while Anconia coeruleipennis , Heliastus aridus, Schistocerca vaga, 

 Trimerotropis texana, Psoloessa texana, Derotmema laticinctum and 

 Phrynotettix robustus were found on and about the mesa. In the sand- 

 hill region the character of the Orthoptera was found to be much like 

 that of the mesa, but in the clumps of mesquite Melanoplus glaucipes, 

 M. herbaceus, Moloplus elegans, and Schistocerca shoshone were found. 



The low bottom-land is covered in many places with tangles of screw 

 bean (Prosopis odorata), with tall rank weeds in others, and areas 

 of hardened bare adobe are also to be found. In the tornillo tangles 

 Melanoplus glaucipes, Moloplus elegans, Mermiria bivittata and Dia- 

 pheromera mesillana were found, while the areas of high weeds har- 

 bored JEoloplus elegans, Melanoplus herbaceus, M. aridus, M. atlanis, 

 Stagmomantis sp., and Diapheromera persimilis. On the bare spots 

 Paropomala virgata, Derotmema laticinctum, Trimerotropis rubripes 

 and Hippiscus corallipes were found. 



Alamogordo and Dry Canyon, Sacramento Mountains, Otero County, 

 New Mexico. Altitude, 4,300 to 5,500 feet. July 12 and 13, 1907. . 



The conditions in the vicinity of Alamogordo have already been 

 treated by Stone and Rehn 2 and Ruthven. 3 Our collecting was re- 

 stricted to the edge of the mesquite area, on the eastern margin of 

 which the town is situated, and the greasewood slopes leading to Dry 

 Canyon. The mesquite section was unproductive, while in the grease- 

 wood belt Bootettix argentatus, Ectatoderus borealis, Gryllus alogus and 

 Psoloessa texana were secured, but most of them not in such numbers as 

 at El Paso. In the broken country at the first foothills and in the 

 arroyos at the canyon mouth collecting was more productive, Para- 

 bacillus coloradus, Dichopetala brevihastata and Yersinia solitaria 



2 Proc. Acad. Nat. Sci. Phila., 1903, p. 16. 



3 Bull. Amer. Mus. Nat. Hist., XXIII, pp. 492-499. 



