ORTHOPTERA. 



Hadrotettix: pronotum not crested in front. Daratmena: sides of metazona 

 narrowed beneath. Mestobregma: lateral canthi bending at principal sulcus 

 or absent in front. Circotettix: posterior veins of hind wings swollen in the 

 middle. Conozoa: crest as high as on prozona. 



Hippiscus: prosternum rough. 



Schistocerca: prosternum spined. 



Orphulella: face and vertex angled or the latter with distinct fovese. Gym- 

 nes, Bootetix and Ligurotettix: top of head bent up from pronolum, the last 

 Opeia, Horisodotes and Napaia: antennae triquetrus, the first with inner spurs 

 of hind tibiae unequal, the last with front wings shorter than abdomen 

 two very distinctly so, in the second forming an acute angle with face. 

 Plectrotettix, Brunneria, StCinobothris, Eupnigodes, Aulocara, Pscessa and 

 Stirapueura: temporse visible from above, the first with face and vertex not 

 meeting in an angle as seen from side, the second and third with temporae 

 more than twice as long as broad, the former with prozona longer than 

 metazona, the fourth with pronotum shorter than head, the fifth with prozona 

 longer than metazona and the last with temporse visible throughout the 

 length. CEonomus and Amphitornus: with a distinct median carina on pro- 

 thorax. Alphia: tibiae red. 



Telmotettix: pronotum extending to tip of abdomen. Paratettix: vertex 

 not narrowed anteriorly. Tettix and Merotettix: vertex advanced beyond 

 eyes, thelatter with vertex wider than an eye. 



Arphia. Cortophaga, Chimarocephala and Encoptolophus: interspace be- 

 tween metasternal foramina longer than broad, the first with hind wings 

 bright colored, the second with middle independent vein midway between 

 others and the third with head compressed. Camnula, Agymnastus and Lep- 

 rus, principal sulcus feeble or wanting on sides of pronotum, the first with 

 pronotal carina conspicuous, the second with wings shorter than abdomen. 

 Lactista: costal margin of wing thickened nearly to tip. Scirtetica, Microtus 

 and Spharagemon: with band on middle of wings, the first with crest feebly 

 intersected, the last with intercalary vein. 



Acridium alutacea — Schistocerca. 



borckii — Mela nop I us. 



differentialis — Melanoplus. 



femurrubrum — Melanoplus. 



granulatus. — Tettix. 



Shoshone — Schistocerca. 



vaga — Schistocerca. 

 .^olophus arcuatus — chenopodil. 



californlcus Scud. 



chenlpodii (Brun.) 

 Agynastus Ingens (Scud.) 

 Alpha cinera (Brun.) 

 Amphitornus ornatus McN. 

 Antonia Integra Scud. 

 Arnilia mexicana (Saus.) 

 Arphia behrensi Saus. 



hesperiphlla Rehn. 



ramona Rehn. 



sulphurea (Fabr.) 

 Aulocara ellloti Thom. 

 Bootettix argentatus Brun. 

 Bradynotus obesa (Thom.) 



referata Scud. 



satur Scud. 

 Bruneria shastana Scud. 

 Caloptenus atlantis — Melanoplus. 



coUaris — CEdalionotus enigma. 



femoratus — Melanoplus. 



femurrubrum — Melanoplus. 



spretus — Melanoplus. 



viridis — Hesperotettix. 

 Camnula pellucida (Scud.) 

 Chimarocephala behrensi Saus. 



brevipennis — Chortophaga. 



