ART. 5 GENERIC REVISION OF THE FOSSORIAL WASPS PARKER 59 



30. Sixth and seventh tergites black 31. 



Sixth, or both sixth and seventh tergites, maculated 33. 



31. Fascia on second tergite continuous velox. 



Fascia on second tergite interrupted o2. 



32. Clypeus with lateral borders black; tarsi more or less heavily suffused 



with black above cinerea. 



Clypeus wholly yellow; tarsi wholly yellow liinei. 



33. Clypeus wholly black alacris. 



Clypeus yellow 34. 



34. Seventli tergite with distinct lateral lobes (fig. 153) 35. 



Seventh tergite without lateral lobes aldabra. 



35. Seventh tergite notched at the apes (fig. 208) trepanda. 



Seventh tergite roundly pointed at the apex (fig. 153) crientalis. 



Seventh tergite squarely truncate at the apex (fig. 191) seculata. 



36. Prccess on sixth sternite prominent, its ventral surface flattene'l, bifurcate 



at apex 37. 



Process on sixth sternite a transverse ridge, not sharply pointed but 

 slightly curved on each side of midline belfragei. 



Process on sixth sternite prominent, very broad and thin, rounded distally, 

 almost a semicircle. (Intermediate segments of anterior tarsus dilated, 

 fattened, and marked with black) Integra. 



Process on sixth sternite prominent, its ventral surface flattened, bluntly 

 pointed; pair of lateral processes on same steniite 38. 



Process on sixth sternite not as above, either relatively small or, if 

 flattened and roundly pointed, then the lateral processes on this sternite 



are lacking 43. 



S7. Spur on the middle tibia reaching to or beyond the middle of the meta- 

 tarsus amoena 



Spur on middle tibia not reaching to or beyond the middle of the meta- 

 tarsus sayi. 



38. Thorax, propodeum, and abdomen without maculations (.Japan) fumida. 



Thorax, propodeum, and abdomen — one or more of these maculated .39. 



39. Narrow basal border of clypeu-^ black 40. 



Basal border of clypeus otherwise 41. 



40. Scutum without discal marks oculata. 



Scutum with well-developed (U-shaped) discal mark nigrocornuta. 



41. Segments 8-12 of flagellum dilated and bluntly spinose on posterior border 



(fig. 140) miserabilis. 



Segments of flagellum not as above 42. 



42. Prothorax not maculated; genital stipes as in Figure 112 hamata. 



Prothorax maculated in greater or less degree ; genital stipes otherwise. 



nubilipennis. 



43. Anterior distal border of middle tibia produced into a spinelike process 44. 



Anterior border of middle tibia not so developed, normal 46. 



44. Middle tibia curved ; middle metatarsus flattened at the apical end. 



merceti. 

 Middle tibia not curved ; middle metatarsus round 45. 



45. Large, 20 mm. ; genital stipes as in Figure 182 regnata. 



Smaller, 15 mm.; genital stipes as in Figure 194 spatulata. 



46. Last three segments of antenna broad, flattened, and excavated below ; 



apical segment triangular in outline (fig. 1.59) 47. 



Last three segments of antenna not as above 48. 



