6 PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 78 



35. Mandibles white; scutellum black medially 28. inquinatus, new species- 

 Mandibles black ; scutellum white medially__29. mediotinctus, new species. 



36. Second tergite with a median white spot near base 37. 



Second tergite without a median white spot 38. 



37. Propodeum with a narrow median basal area defined by carinae and with 



a median black stripe 30. areolaris, new species. 



Propodeum impressed in basal middle but without a defined area ; immacu- 

 late 31. circumfluens, new species. 



38. Head not constricted below eyes, mouth broader than narrowest width of 



face ; mandibles black 32. manni, new species. 



Head constricted below eyes, mouth hardly as broad as narrowest width of 

 face ; mandibles white 39. 



39. Malar space hardly as long as basal width of mandible; posterior orbits with 



a narrow white line continuous over top of eye ; apophyses of normal 



length, straight 33. confusus, new species. 



Malar space longer than basal width of mandible; posterior orbits black 

 with a white spot; apophyses very long, curved 34. copiosus Cresson. 



40. Mesosternum and middle and hind coxae dark ferruginous ; propodeum 



deeply impressed in basal middle with a prominent rounded .yellow ele- 

 vation on each side of impression 35. colliculatus, new species. 



Mesosternum and coxae white or stramineous, the hind coxae frequently 

 with a black stripe above; propodeum of other form 41. 



41. Second tergite white medially near base 42. 



Second tergite not white medially toward base 46. 



i2. Mesoscutum immaculate black; occipital carina curving sharply mesad and 

 meeting the hypostomal carina farther from base of mandible than the 



latter is broad at base 36. macer Cresson. 



Mesoscutum with two white lines in middle ; occipital carina either inter- 

 rupted below or meeting hypostomal carina not far from base of man- 

 dible 43. 



43. Scutellum white ; occipital carina rather prominent below and not reaching 



hypostomal carina 44. 



Scutellum with only apex and carinae white; occipital carina complete or 

 obsolete below 45. 



44. Subhasal white spot of second tergite transversely quadrangular ; basal 



middle of propodeum narrowly impressed but without a basal area de- 

 fined by carinae ; wings hyaline 37. duplicatus, new species. 



Subbasal white spot of second tergite triangular ; basal middle of pro- 

 podeum with a narrow area defined laterally by carinae ; wings slightly 

 infumate 38. triangularis, new species. 



45. Occipital carina fading out below and not reaching hypostomal carina ; 



apophyses long, slender, curved 39. major Cresson. 



Occipital carina complete to occipital carina ; apophyses long, but stouter 



and straight 40. semialbus (Cresson). 



41. montezuma Cameron 



46. Dark color of head and thorax reddish piceous rathern than black; frontal 



horn white at apex ; transverse dark band behind basal carina of pro- 

 podeum broadly confluent with lateral stripe 42. lituratus Brulle. 



Dark color of head and thorax black ; frontal horn black ; transverse dark 

 baud at most narrowly confluent with lateral stripe; metapleurum more 

 or less coarsely punctate, especially in male 47. 



47. Hind femur black above, whitish below 43. collinus Cameron. 



Hind femur testaceous 44. neglectus Cushman. 



