HENRY J. FRANKLIN. 75 



24. The two apical dorsal abdominal segments red-ferruginous. 



robust us 

 var. rufooiiudatus (placed in this table on the color characters 

 of the male) . 

 The two apical dorsal abdominal segments with white pile. 



robustus var. ductus. 



25. Fourth dorsal abdominal segment at least partly red or reddish- 



ferruginous 49. 



Fourth dorsal abdominal segment black uigTortorsalis. 



26. vSecond dorsal abdominal segment clothed entirely with red-ferru- 



ginous pile latioinctus n. sp. 



Second segment not so clothed uiexicensis n. sp. 



27. Both face and occiput heavily clothed with yellow pile. 



vosnesenskii. 

 Face with little or no yellow pile 28. 



28. Dorsum of abdomen with the four basal segments clothed entirely 



with yellow pile 29 . 



Dorsum of abdomen not so clothed 30. 



29. Mesopleura, to a considerable extent, clothed with yellow pile. 



fervidus. 

 Mesopleura with little or no yellow pile souonuv. 



30. The two apical dorsal abdominal segments entirely dark 31. 



Either the epipygium or the segment before it, or both, with more 



or less white, whitish, yellow, or yellowish pile 43. 



31. All the dorsal abdominal segments beyond the second entirely 



dark 32. 



Not all the segments beyond the second entirely dark 33. 



32. .Scutellum and first dorsal abdominal segment black crotobii. 



Scutellum and first dorsal abdominal segment yellow..frateruus. 



33. The fourth dorsal abdominal segment yellow califoruicus. 



The fourth dorsal abdominal segment black 34. 



34. Mesopleura covered with yellow pile from the level of the bases of 



the wings to the bases of the legs 35. 



Mesopleura entirely or largely covered with black pile 36. 



35. The third dorsal abdominal segment entirely yellow. 



brasilieusis. 

 The third segment yellow only in the middle "wiluiattae. 



36. Dorsum of thorax unicolorous 37. 



Dorsum of thorax bicolored 38. 



37. The two basal dorsal abdominal segments entirely or mostly 



black 39. 



The two basal dorsal abdominal segments yellow niorrisoni. 



38. The second dorsal abdominal segment yellow 40. 



The second dorsal abdominal segment black 41. 



39. Dorsum of thorax yellow steinrtacbneri. 



Dorsum of thorax black 42. 



TRANS. AM. ENT. SOC, XXXIX. 



