116 THOMAS SAY FOUNDATION 



23. The stout divergent prongs at the tip of the 



penis cover and conceal the minute incurved 

 copulatory tube, or at most have a V- 

 shaped opening (widespread) 



No. 64. aculeata n. sp. 

 The prongs spread apart U-shaped so as to show 

 the much larger incurved tube 24. 



24. The penultimate lateral processes of the penis 



extend forward and are thick and black, 

 with spinose outer side (widespread) 



No. 6.5. aculeata var. gavia n. sp. 



The penultimate lateral processes extend for-* 



ward onlv a short distance, but extend back- 



ward and underneath in the form of a thin 



brown margin (widesj)read) 



No. 66. aculeata var. tcediosa n. var. 



25. Tibiae yellow (Georgia) 



No. 67. flavipes n. sp. 

 Tibia? black 26. 



26. First segment of hypopygium very large, flat 



behind, giving the abdomen a truncated ap- 

 pearance; acrostichals well developed (wide- 

 spread) No. 68. larga n. sp. 

 Not as described 27. 



27. Abdomen red except first segment (Texas, 



Mexico, South America) 



No. 68. rufiventris Wied. 

 Abdomen black 28. 



28. Penis in the shape of an elongated flask (Texas) 



No. 70. ampulla n. sp. 

 Penis not flask-sliaped 29. 



29. First segment of hy2:)opygium prominent 



(Cuba) No. 71. hisenata n. sp. 



First segment retracted, almost invisible 80. 



30. Hypopygium and posterior half of fourth ab- 



dominal segment red (Cuba, Mexico) 



No. 72. surruhea V. d. W. 

 Fourth abdominal segment black 31. 



