1909.] NATURAL SCIENCES OF PHILADELPHIA. Ill 



AN ORTHOPTEROLOGICAL RECONNOISSANCE OF THE SOUTHWESTERN 

 UNITED STATES. PART II: NEW MEXICO AND WESTERN TEXAS. 



BY JAMES A. G. REHN and MORGAN HEBARD. 



The first portion of the results of this examination of the south- 

 western United States, treating of Arizona material, has already been 

 published in these Proceedings. 1 



Seven rather distinct regions were examined in the area covered by 

 this paper, notes on the localities being given below. In addition a 

 number of other localities are represented in the series by lots of from 

 one to six species. A small lot of material from Fort Wingate, McKin- 

 ley County, New Mexico, collected by Mr. John Woodgate and now the 

 property of the Academy, has also been examined in this connection. 



Mr. Otho Poling, of Quincy, Illinois, assisted in collecting some of 

 the material secured at Deming, while all taken at Albuquerque and 

 Aden was collected by the junior author. 



The number of species examined and treated in this report is one 

 hundred and fifteen, of which six prove to be new, while the specimens 

 number one thousand, three hundred and ninety-five. 



The types of all the new forms are in the Hebard Collection. 



El Paso and Franklin Mountains, El Paso County, Texas. Alti- 

 tudes, 3,700 to about 5,600 feet. July 9 to 11 and 17, 1907. 



The vicinity of El Paso may be divided into several regions: first, 

 the low bottom-land along the river, this section being threaded with 

 acequias and a considerable portion is or has been under cultivation; 

 second, a region of low sand dunes slightly northeast of the city, 

 covered with a scattering growth of mesquite ; third, a fairly extensive 

 mesa bordering the Franklin Mountains, very broken and rugged on 

 its eroded marginal slopes where is exposed a sort of caliche as the basis 

 of the mesa, and quite level on the summit, all covered more or less 

 completely with rather uniformly-sized greasewood {Covillea tridentata) 

 bushes, mingled on the rugged base slopes with mesquite (Prosopis 

 velutina) and occasionally tornillo or screw bean (Prosopis odorata) ; 

 fourth, the Franklin Mountains, rising from the mesa to an elevation 



1 Proc. Acad. Nat. Sci. Phila., 1908, pp. 365-402. 



