34 
Psyche 
[Mar. 
Length 7 mm. 
One male from Patagonia, Arizona, 20 August (Be- 
quaert). Type M.C.Z. no. 27621. 
Cerceris minax Mickel 
Mickel, Nebr. Univ. Studies, XVII : 339, 1917. 
I have a paratype from Auburn, Calif. ; also described 
from Sacramento. 
Cerceris hesperina Bks. 
Banks, Bull. Mus. Comp. Zool., LXI: 115, 1917. 
Specimens from Ainsworth, 20 July and Yakima City, 
2 July, both Wash. (Henshaw). 
C. pudorosa Mickel (Nebr. Univ. Studies, XVII: 338, 
1917) appears to be a synonym; hesperina has several 
months priority. 
Fig. 1. 
Fig. 2. 
Fig. 3. 
Fig. 4. 
Fig. 5. 
Fig. 6. 
Fig. 7. 
Fig. 8. 
Fig. 9. 
Fig. 10. 
Fig. 11. 
Fig. 12. 
Fig. 13. 
Fig. 14. 
Fig. 15. 
Fig. 16. 
Fig. 17. 
Fig. 18. 
Fig. 19. 
Fig. 20. 
Fig. 21. 
Fig. 22. 
Explanation of Plate 1 
Cerceris athene, base of abdomen. 
Cerceris athene, pygidium, side of head. 
Cerceris completa, base of abdomen. 
Cerceris illota, teeth on lobe of sixth ventrite. 
Cerceris arno, pygidium. 
Cerceris viereclci, pygidium. 
Cerceris snoivi, pygidium. 
Cerceris calodera, side-view of abdomen. 
Cerceris illota, clypeus. 
Cerceris isolde, clypeus. 
Cerceris convergens, pygidium. 
Cerceris cequalis, pygidium. 
Cerceris eurymele, clypeal process from above. 
Cerceris thione, clypeus from in front. 
Cerceris melanthe, pygidium. 
Cerceris femur-rubrum, clypeus of male. 
Cerceris complanata, head from side. 
Cerceris populorum, edge of clypeus. 
Cerceris populorum, teeth on lobe of sixth ventrite. 
Cerceris illota, lobe of fifth ventrite. 
Cerceris athene, clypeus. 
Cerceris sextoides, clypeal process from above. 
