18 PROCEEDINGS OF THE NATIONAL MUSEUM. voi,. 65, 



9. Inner hooks with the spinelike projection one-third or more the entire 

 length of the hook 10 



Inner hooks with the spinelike projection never more than one-sixth the 

 entire length of the hook 14 



10. Inner hooks with the spinelike projection more than one-half the entire 



length of the hook limbalis, p. 25. 



Inner hooks with the spinelike projection one-half or less than the entire 

 length of the hook 11 



11. Pronotum with the secondary setae wanting except a single large one cep- 



halo-lateral of seta 4 purpurea graminea, p. 27. 



Pronotum with the secondary setae small, 10 or more in number 12 



12. Ninth abdominal sternum with the caudal margin bearing two groups of 



three setae each 13 



Ninth abdominal sternum with the caudal margin bearing two groups of 

 four setae each species B, p. 28. 



13. Antenna with the proximal segment bearing five to seven setae, the second 



segment with ten to twelve ; median hooks with three setae,. 



latesignata, p. 29. 



Antenna with the proximal segment bearing ten to twelve setae, the second 



segment with six to eight ; median hooks with one seta species C, p. 30. 



14. Pronotum with the secondary setae few, not more than ten in number ; an- 



tenna with the proximal segment bearing ten to eleven setae; median 

 hooks normally with a single large seta, if two are present one much 



smaller than the other repanda, p. 31. 



Pronotum with the secondary setae numerous, 50 or more in number ; an- 

 tenna with the proximal segment bearing six or seven setae ; median 

 hooks with two setae lepida, p. 32. 



15. Inner hooks with the spinelike projection about one-sixth the entire length 



of the hook, the setae inserted on a broad shoulder ; pronotum with the 

 cephalo-lateral angles distinctly caudad of the cephalo-mesal portion. 



gratiosa, p. 34. 



Inner hooks with the spinelike projection about one-third or more the 



entire length of. the hook, the setae inserted on a sloping shoulder; 



pronotum with the cephalo-lateral angles not distinctly caudad of the 



cephalo-mesal portion 16 



16. Ninth abdominal sternum with the caudal margin bearing two groups of 



more than three setae each 17 



Ninth abdominal sternum with the caudal margin bearing two groups of 

 three setae each 19 



17. Ninth abdominal sternum with the caudal margin bearing two groups of 



four setae each 18 



Ninth abdominal sternum with the caudal margin bearing two groups of 

 five setae each species D, p. 34. 



18. Head and pronotum bright coppery bronze with a strong bluish-green reflec- 



tion ; distance between ocelli 1 and 2 less than the diameter of ocellus 2. 



tranquebarica, p. 36. 

 Head and pronotum purplish bronze with a purple reflection ; distance be- 

 tween ocelli 1 and 2 greater than the diameter of ocellus 2. 



silvicola, p. 37. 



19. Antenna with the proximal segment bearing 8 to 11 setae 20 



Antenna with the proximal segment bearing five or six setae 22 



20. Pronotum with the secondary setae 25 to 30 in number and with a row 



on each side of the meson, the blue reflection very strong. 



oregona, p. 38. 



