PLATE XVII. 
Fig. 1. Melanoplus cinereus Scudder. Female ; Wallula. (This and all the other fig- 
ures of natural size.) 
2. Melanoplus devastator Scudder. A Bmall female ; Reno, Nevada. 
3. Melanoplus devastator Scudder. A large female ; Redding, California. 
4. Melanoplus cinereus Scudder. Female ; Reno, Nevada. 
5. Melanoplus cinereus Scudder. Male; Reno, Nevada. 
6. Melanoplus atlanis (Riley). Female ; Victoria, Vancouver's Island. 
7. Melanoplus packardii Scudder. Male ; Wallula, Washington Terr. 
8. Melanoplus packardii Scudder. Female; Wallula, Washington Terr. 
9. Camnula atrox Scudder. Female ; Vancouver's Island. 
10. Circotettix maculatus Scudder. Female; summit Sierra Nevada. 
11. Trimerotropis vinculata Scudder. Siasons, base of Mount Shasta, California. 
12. Arphia frigida Scudder. Male; Selena, Montana. 
13. Psinidia wallula Scudder. Female; Wallula. 
14. Psinidia wallula Scudder. Male; Sissons, base of Mount Shasta. 
15. Gomphocerus shastanus Scudder. Mount Shasta, California. 
16. Pezotettix pacificus Scudder. Male ; California. 
17. Pezotettix borckii Stal. , Portland, Oregon. 
18. Gomphocerus shastanus Scudder. Female; Mount Shasta, California. 
19. Melanoplus devastator Scudder. Male; Colorado, 1879. 
20. Melanoplus devastator Scudder. Male; FortKeogli. Montana, 1880. 
