4 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.65. 



35. Head and thorax quite densely clothed with ahort ochraceous hair (East- 



ern States) vierecki Crawford. 



Head and thorax not thus clothed 36 



36. Mesothorax blue, shining, delicately punctured 37 



Mesothorax green 38 



37. Face quadrate; disk of propodeum polished, with weak plicae on base only 



(Arizona) kunzei Cockerell. 



Face subcircular; disk of propodeum with anastomosing rugae (New Mex- 

 ico) clarissimus Ellis. 



38. Disk of propodeum shining, plicate, abdomen hoary with yellowish hair 



(Wisconsin) graenicheri Ellis. 



Disk of propodeum granular or reticulated 39 



39. Mesothorax closely punctured 40 



Mesothorax sparsely or delicately punctured 41 



40. Head broad; disk of propodeum long, reticulated; flagellum dark (New 



Mexico) clematisellus Cockerell. 



Head normal; disk of propodeum short, granular; flagellum testaceous (Colo- 

 rado) hudsoniellus Cockerell. 



41. Thorax and abdomen hoary with white hair; disk of propodeum short, with 



coarsely anastomosing rugae (New Mexico) mesillensis Cockerell. 



Thorax and abdomen not thus hoary; disk of propodeum long 42 



42. Larger, about 6 mm. long; flagellum dark, dusky ferruginous at the apex; 



legs largely dark (Colorado) scrophulariae Cockerell. 



Smaller, 4.5 mm. long; flagellum yellow- testaceous beneath; legs largely 

 testaceous (North Dakota) testaceus Robertson. 



43. Small species, anterior wing about 3 mm. long; often with very clear wings. . 44 

 Larger species 55 



44. Tegulae dark; wings faintly dusky • 45 



Tegulae light; or if tegulae reddened, wings clear 49 



45. Head and thorax blue 46 



Head and thorax green 47 



46. Mesothorax very dark blue, finely and closely punctured; disk of propo- 



deum semicircular, finely granular (New Mexico). 



ruidosensis Cockerell, variety. 

 Mesothorax more brilliant blue, more coarsely punctured; disk of propo- 

 deum truncate posteriorly, granular with fine radiating plicae (St. Vincent, 

 W. L) plumbeus Ashmead. 



47. Disk of propodeum granular; mesothorax opaque (Jamaica) jamaicae Ellis. 



Disk of propodeum not granular, plicate on basal portion; mesothorax 



somewhat polished 48 



48. Mesothorax brassy green; disk of propodeum short (Jamaica). 



liguanensls, new species. 

 Mesothorax not brassy; disk of propodeum longer (Guatemala) deceptor Ellis. 



49. Wings milky white, or very clear white 50 



Wings yellowish 53 



50. Mesothorax opaque, granular; disk of propodeum granular (Virginia). 



coreopsis Robertson- 

 Mesothorax shining blue, delicately punctured; disk of propodeum not 

 or hardly granular 51 



51. Head, thorax, and abdomen hoary with white hair; disk of propodeum 



plicate on base only (New Mexico) pallidellus Ellis. 



Not thus hoary 52 



