JVasps of the Genus Tacliytes. 



PuLescence of terptes silver or grey, 

 and conHiied to the apical lasciie .... 31. 



31. Third steriiite opaque, very closely and 



microscopically punctured 32. 



Third sternite shining-, the punctui-es 

 neither microscopic nor close 33. 



32. "Wings tlavo-hyaiine, costa fiilvons; eyes 



separated on the vertex by a distance 

 scarcely equal to tlie length of the 

 two basal j )ints of tlie flagelUim .... T. erynnis, Turn. 

 "Wings hyaline, costa fuscuus ; eyes 

 separated on the vertex by a distance 

 half as great again as the length of 

 the second joint of the flagelliim .... T. ine.vorahilis, Turn, 



33. Vertex rugosely punctured ; ventral *" 



segments 3-5 evenly punctured; 

 thorax with dense fulvous pubes- 

 cence T. versatilis, Turn. 



Vertex not rugosely punctured ; ventral 

 segments 3-5 sparsely' and irregularly 

 punctured ; thorax with grej- or 

 golden-grey pubescence 34. 



34. Pubescence of the thorax golden-grey ; 



pygidial area broadly rounded at the 



apex T. lachesis, Turn. 



Pubescence of the thorax grey ; pygidial 



area subacute at the apex 2\ transvaaleiisis, Cam. 



35. Pubescence of the abdomen golden, of 



the pygidial area silver; pubescence 

 of the abdomen not confined to the 

 apical margin, but covering the whole 



dorsal surface T. limctallica, Turn, 



Pubescence of the abdomen confined to 

 the apical fasciae ; silver or grey, 

 except in rare varieties; pubescence 

 of tlie pygidial area never silver . , , , 36, 



36. Thorax punctured rugulose ; median 



segment rugulose T. notahilis, Turn. 



Sculpture of thorax and median segment 

 microscopic 37. 



37. Eyes separated on the vertex by a dis- 



tance scarcely equal to the length of 

 the second joint of the flagellum .... T. megcera, Turn. 

 Eyes separated on the vertex by a dis- 

 tance equal to tlie combined length 

 of the two basal joints of the fla- 

 gellum 38. 



38. Vertex distinctly and rather sparsely 



punctured T. instahilis, Turn, 



Vertex almost smooth, the punctures 

 microscopic 39, 



39. Pubescence of tliorax and median seg- 



ment white; length 9-10 mm T. silverlocki, Turn. 



Pubescence of thorax and median 

 segment golden-grey ; length 11- 

 13 mm T. pulc/t)-icor?ns, Turn, 



