114 THOMAS SAY FOUNDATION 



9. Frontal rows not strongly divergent below; 

 epaulets yellow (widespread). 



No. 49. peniculata Park. 

 Frontal rows suddenly diverging in the last two 

 or three bristles; epaulet black 10. 



10. Anterior acrostichals absent or very indistinct 



New Jersey, Pennsylvania, Ohio) 



No. 50. imrallela n. sp. 

 Anterior acrostichals well developed. 11. 



11. Parafacials and front part of bucca golden yel- 



low (Indiana, Louisiana, Missouri) 



No. 51. rudis n. sp. 

 Parafacials gray 12. 



12. Penis with a pair of erect recurved hooks on the 



back near apex 13. 



Penis not with hooks on back 16. 



13. Accessory plate broad and excised at apex 



(Massachusetts) 



No. 52. CtTcisa n. sp. 

 Accessory plate nearly round 14. 



Accessory plate at least twice as long as wide, 



not excised 15. 



14. Forceps near the tip swollen behind and cov- 



ered with minute barbs (Colorado, New 

 Mexico) No. 53. el cod is n. sp. 



Forceps straight, slender (Georgia) 



No. 54. wasculina n. sp. 



15. Distal segment of penis slender, narrowed at tip 



(widespread) No. 5o. alcedo n. sp. 

 Distal segment enlarged at the end, blunt (Kan- 

 sas) No. 56. jjrohihita n. sp. 



16. Distal segment of the penis in the form of a long 



tube, incurved at the end and forming a 

 loop that can be seen through in profile be- 

 yond the lateral processes (widespread) 

 No. 57. reversa n. sp. 

 Distal portion not forming a loop that can be 

 seen through 17. 



