H. C. FALL. 183 



EXPLANATION OF PLATE IIL 



;. L — A. perminutum : la, basal joints of anteniift. 



2. — A. recliisiim ; 2a, " " " %. 



3. — A. pundinannm % ; Za, tarsus. 



4. — A. curticorne; 4a, head and autenn» ( 9 ) "f same. 



5. — A. tenuiforme ; 5a, middle tarsus % . 



6. — A. sordidiim : 6a, tarsus. 



7. — " var. (Arizona). 



8. — " var. caUforniciim : Sn. tarsus. 



9. — A. oedorhynehum. % . 

 10. — .4. antennatnm % . 

 ll.^Front tibia of antennutum % . 

 12. — '■ '' acrophihim % . 



13. — Claw of reclusum, punctinasum, etc. 

 14. — " " perminutum, acrophilum, etc. 

 15. — '' " oedorhynehum and antennatum. 



EXPLANATION OF PLATE IV. 



r. 1. — Prothorax not sinuate before the basal margin (.4. tennirostrum). 

 2. — Prothorax sinuate posteriorly ; base as wide or wider than the middle 



{A. pervicax). 

 3. — Prothorax sinuate posteriorly; base narrower than the middle (^4. 



cordatum). 

 4. — Usual shapes of claws in Section III. 

 5. — Thorax of A. metallieum. 

 6. — " " ^4. troglodytes. 



7. la. — ^4. propiuquicorne % . 



8. 8a.— A. modestuni % . 



9. 9a, 96. — ^4. proclive % . 



10. — Head of A. minor 5 ; 10« same 9 • 



11, 11«. — A. patruele % . 



12, 12a.— ^. wahhii % ; 12b head 9 . 

 13. — A. abdominale. 



14. — Mucro of posterior tibia % , A. pervicax. 



15. — " " " A. proclive. 



16. — • " " " ^4. chuparosse. 



17. — " " " A. patruele. ^- 



18. — " " ■' A. walshii. 



19. — " " ■' A. nouellum. 



20. — " " " A. nebraskense. 



21. — Posterior margin of antennal fovea angulate. 



22. — " " " " not angulate. 



TEANS. AM. ENT. SOC. XXV. DECEMBER, 1898. 



