FURTHER RESEARCHES ON NORTH AMERICAN ACRIDinxE. 21 



Dissosteira longipennis. Hesperotettix viridis. 



Spharagemon aequale. Aeoloplus regalis. 



Spharagemon cristatum. Melanoplus atlanis. 



Trachyrhachis fuscifrons. Melanoplus bispinosus. 



Psinidia fenestralis. Melanoplus bivittatus. 



Hadrotettix trifasciatus. Melanoplus differentialis. 



Trimerotropis citrina. Melanoplus femur-rubrum. 



Trimerotropis latifasciata. Melanoplus foedus. 



Trimerotropis saxatilis. Melanoplus keeleri. 



Trimerotropis vinculata. Melanoplus glaucipes. 



Trimerotropis bruneri. Melanoplus flavidus. 



Brachystola magna. Melanoplus impiger. 



Schistocerca albolineata. Melanoplus packardii. 



Schistocerca americana. Melanoplus palmeri. 



Schistocerca lineata. Melanoplus plebejus. 



Schistocerca obscura. Melanoplus regalis. 



Hypochlora alba. Melanoplus tuberculatus. 



Campylacantha olivacea. Phoetaliotes nebrascensis. 



Hesperotettix speciosus. Dactylotum pictum. 



The high plains, Staked Plains, or, in Texan phraseology simply 

 " the Plains," were touched at but one point, Amarillo, in the center 

 of the Panhandle region of Texas, at an elevation of 3,600 feet, on 

 August 19 and 20. Here the following six species, not taken else- 

 where, were secured, together with 25 of the preceding list, many 

 others of which, it is probable, occur there and would have been 

 found in a longer stay : 



Cordillacris crenulata. Tropidolophus formosus. 



Trachyrhachis kiowa. Melanoplus discolor. 



Metator pardalinum. Melanoplus lakinus. 



Of these species inhabiting the semi-arid plains and prairies 

 Paratettix cucullatus, Encoptolophus pawns, and Trimerotropis citrina 

 frequent the margins or partly dried beds of streams and sloughs or 

 sinks; E. parvus is partial to plowed fields also, and T. citrina, its 

 congeners, and the species at Dissosteira, Spharagemon, Mestobregma, 

 and Hadrotettix are common on roadsides, washes, ant-fields, and 

 other patches of bare, sun-baked soil, flying up by the dozen before 

 the traveler (pi. 5, fig. i). The low but often dense and tangled 

 growth of mesquite and grama grasses (foreground, pi. 5, fig. 2 ; pi. 7, 

 fig. i) is the home of Opeia obscttra, Amphitornus bicolor, Cordillacris 

 crenulata, Phlibostroma quadrimaculatum , Orphulella picturata, and 

 Encoptolophus costalis. This habitat is one of those frequented by the 

 species of Arphia and Hippiscus, which also occur in the tall, coarse 

 bunch-grasses in company with the species of Mermiria, Syrbula 

 admirabilis, Phoetaliotes nebrascensis, and several species of Melanophcs. 



