162 Eev. T. A. Marshall's monograph of 



(6) 5. Triangular enclosed space on segment 2 



aciculated . . . . . . . . 56. immunis, Hal. 



(5) (). Triangular enclosed space on segment 2 



smooth. 

 (8) 7. Segment 1 one-half longer than broad ; 



four 2)osterior femora testaceous, often 



with fuscous lines . . . . . . 57. caberce, n. s. 



(7) 8. Segment 1 hardly longer than broad, 



subquadrate ; four posterior femora 



black , . . . . . . . , . 58. popularis, Hal. 



Section IV. Segment 1 narrow, attenuated behind and 

 rounded or lanceolate at the apex ; at least twice as 

 long as broad. Segment 2 not much shorter than 

 3, usually impressed with two oblique discal lines 

 converging towards the base, and enclosing a sub- 

 triangular space. Terebra variable. 



(14) 1. Segment 1 less than three times as long 



as its medial breadth. 



(5) 2. Hind femora and tibia; entirely or mostly 



black. 



(4) 3. Segment 1 attenuated posteriorly from 



the middle ; length, 1 lin. .. .. 59. fraternus,'Reinh. 



(3) 4. Segment 1 attenuated posteriorly from 



near the apex; length, IJ lin. .. 60. triaiii)ulator,'\Yesm. 

 (2) 5. Hind femora and tibiaj testaceous, or 



with only slight infuscations. 



(7) 6. Metathorax carinated, rugulose . . 61. pallidipes, Eeinh. 



(6) 7. Metathorax not carinated, smooth, or 



finely punctulate. 

 (9) 8. Mesothorax punctulate . . . . . . 62. hicolor, Nees. 



(8) 9. Mesothorax smooth. 



(11) 10. Oblique impressions on segment 2 in- 



complete, not reaching the hind mar- 

 gin ; length nearly 2 lines . . . . 63. fonnosiis, Wesm. 



(10) 11. Oblique impressions on segment 2 com- 

 plete ; length, 1 line or less. 



(13) 12. Abdomen* testaceous with the apex 

 black ; terebra ! of the abdomen ; 

 length, 1 lin. .. .. .. ..64. lautcllus, n.s. 



(12) 13. Abdomen black, testaceous at the sides; 



terebra ^ of the abdomen ; length, 



J lin. . . . . . . . . . . 65. umbellatanttn, Hal. 



(1) 14. Segment 1 three times as long as its 

 medial breadth, or longer. 

 (16) 15. Hind coxjk thickly punctured, dull . 66. callidus:, Hal. 



(15) 16. Hind coxae finely punctulate, shining. 



'■' Except A arieties, in which the black colour more or less pre- 

 dominates. 



