Hetcrogi/na and Fossorial llipnenoptcra. 281 



(30) 27. Mesosternum spinose at the sides. 



(39) 28. Metathoracic area striated . . . . . . varius. 



(28) 29. Metathoracic area smooth and shining . . exiguus. 



(27) :}0. Mesosternum not spinose. 

 32) 31. Thorax more or less shining; puncturation fine, 

 but not so very close ; tibice widely pale at the 

 base ; metathoracic area polished and shining 

 in both sexes, rarely finely striate in tlie ^ U'eHindcli. 



(31) 32. Thorax dull ; puncturation very close ; tibite 



very narrowly pale at the base ; metathoracic 

 area deeply stiiate in the ^ , striate at the sides 



only in the J .. clongatulus. 



(8) 33. Abdomen black and yellow. 



(37) 34. Recurrent nervure emitted just beyond the mid- 



dle ol the submarginal cell. (PI. VIII. fig. 45) 

 (30) 35. Posterior tibiaj of the ^ spinose, those of the 



5 much and closely spined dbnidiatus. 



(35) 36. Posterior tibiae of the ^ not spined, those of 



the 2 less sj^ined than in the preceding . . sujnatus. 

 (3-4) 37. Recurrent nervuie emitted considerably beyond 



the middle of the submarginal cell. (PI. VIII. 



fig.4C). 



(39; 38. 2nd segment of the abdomen beneath without a 



pilose spot on each side ragahundns. 



(38) 39. 2nd segment of the abdomen beneath with a 



pilose spot on each side . . . . . . . . ceplialotes. 



(7) 40. Cheeks beneath with a strong sj^ine . . . . l-maculatus. 



(C) 41. Ocelli in an isosceles triangle much widest at 



the base. 



(53) 42. Abdomen black and yellow. 



(48) 43. Mesosternum without a short raised crest in 



front of the intermediate coxae; ^ antenna 



fusiform ; tibiae patellated. 

 (45) 44. Thorax above striated . . . . . . . . crihrarins. 



(44) 45. Thorax above not striated. 



(47) 40. Anterior angles of prothorax prominent . . pcZ?art»s. 



(4C) 47. Anterior angles of prothorax obtuse . . . . scutellatus. 



(43) 48. Mesosternum with a short raised crest in front 



of the intermediate coxae. 

 (52) 49. Thorax punctured and sometimes longitudinally 



striate, but not transversely striate in front. 



(51) 50. Thorax posteriorly and scutellum striate among 

 the punctures; 3rd abdominal segment banded 

 with yellow .. .. .. .. .. chrysostoma. 



(50) 51. Thorax and scutellum rugosely punctured ; 3rd 



abdominal segment entirely black . . . . vagus. 



(40) 52. Thorax transverely striate in front, longitudi- 

 nally behind . . . . . . . . . , interriqjtus. 



(42) 53. Abdomen entirely black or bronzy. 



(55) 54. Abdomen bronzy black ; head not wider than 



the thorax .. .. .. .. .. albUahris. 



(54) 55. Abdomen without a bronzy tint ; head wider 



than the thorax .. .. .. .. .. Panzeri. 



(5) 50. Abdomen strongly punctured. . ,. .. clypeatus. 



