226 THE ENTOMOLOGIST. 



** Segments 2nd and 3rd and greater part of legs red ; aculeus half 

 of abdomen ; apex of abdomen white - - fulgens, 3 lines. 

 b. Metathoracic arese not complete and distinct. 



* Metathorax so rough that the arese are not distinct. 



I Abdomen red; tibise partly white. 38. parviventris, 3 — 4 lines, 

 ft Segments 2nd to 3rd, femora and tibise, red ; apex of hinder black. 



89. quadrisjnnus, 3 — 4 lines. 

 ** Metathorax not so roughened, more or less distinctly rugose. 

 I 1st and 2nd abdominal segments polished. 

 § Abdomen red, petiole black. 

 X Inner orbits above the antennas red. - 46. erratur, 4 lines. 

 X X Inner orbits not red. 



Hind tibise red, apex black ; legs rather stout. 



47. ahdominator, 2 — 3i lines. 

 00 Hind tibiae black, extreme base lighter ; legs less short and thick. 



49. ohscurijyes, 3J lines. 

 §§ Apex of abdomen, and more or less of the 1st segment, black. 

 -H Coxae black. - - - - - 45. curvus, 3 — 4^ lines. 



-h -i- Coxae red. ...... prohis, 2+ — 3 lines. 



\l 1st abdominal segment aciculate, 2nd finely reticulate. 



Abdomen red, apex black, anus white, legs red; aculeus as long 

 as the abdomen. - - - . 63. lacteator, 3 — 3i lines. 

 E. Antennae tricoloured (females). 



a. Metathoracic areae complete and distinct. 



* 1st segment distinctly aciculate. 



Segments 2nd to 3rd and legs almost entirely red ; aculeus very 

 short. ----- 5. dunietorum, 2^ — 21 lines. 

 ^-'- Ist and 2nd segments polished, at the most with scattered 

 punctures and aciculations. 

 f Abdomen red, petiole black. 



1 Middle and hind tibiae with spines on the outside. 



32. projiigator, 2-J — 3|- lines 

 \\ Middle and hind tibiae without spines. 26. brevis, 2 — 2-| lines. 



fi Apex of abdomen black. 



§ Legs entirely red. . . . . 27. gravipes, '^\ lines. 

 §§ Apex of hind femora and tibiae black. 28. improhns, 2 — 3 lines. 



b. Metathoracic areae not complete and distinct. 



* 1st segment not regularly punctured, with scattered punctures or 



indistinct aciculations, generally polished in front, and without 

 any perceptible sculpture ; 2nd segment polished, with now and 

 then very fine scattered punctures, 

 f Metathorax with two transverse lines ; supero-medial area not 

 defined at sides. - - 28. improhns, var., 2 — 3 lines. 



if Metathorax with one or no transverse lines, the lateral areae not 



subdivided. 

 I Metathorax polished. 

 Segments 1st to 3rd and greater part of legs red ; aculeus half of 

 abdomen. .... 43. graminicola, 2|^ lines. 



II Metathorax more or less distinctly rugose. 



§ Hind tibiae red, apex black. - - ,54. Sjjinola, 3 lines. 



§§ Hind tibise white at the base, apex black. 



56. Imsizonits, 2 — Si lines. 



