74 REVISION OF THE THYNNID^ OF AUSTRALIA, II., 



a 5 . The hypopygium broadly produced from the 

 rounded basal prominences. 

 a 6 . Wholly black. villosus Guer. 106 



b 6 . Not wholly black. 



a 7 . The legs and mandibles ferruginous 



fervens Sm. 107 



b 7 . The legs black, the mandibles yellow. 



anilitatis Sm. 108 

 b 5 . The hypopygium narrowly produced from the 

 acute basal prominences, the sides parallel. 



froggatti 123 



b*. The hypopygium triangular or subtriangular, with 

 or without basal prominences. 

 a 5 . Wings hyaline or flavo-hyaline. 



a 6 . The abdominal segments strongly constricted. 

 a 7 . Abdomen black. 



a 8 . Abdomen wholly black. obscurus Klug. 121 



b 8 . The two apical abdominal segments red. 



mamillatus 109 



b 7 . Abdomen ferruginous. 

 a 8 . The ventral segments without tubercles. 



petulans Sm. 118 

 b & . Some of the ventral segments with tubercles 

 at the sides. 

 a 9 . Segments 3-5 with tubercles, icieseri D.T. 117 

 b 9 . Segments 3-4 with tubercles, excoriatus 116 



b e . The abdominal segments not at all or very 

 slightly constricted. 

 a 7 . Abdomen black, without markings. 



a 8 . Hypopygium unarmed. temiatus Sm. Ill 



6 8 . Hypopygium armed. 

 a 9 . Clypeus with a medium carina, wholly 



black ambiguus 110 



b 9 . Clypeus without a carina, margined with 

 yellow. 

 a 10 . Legs fusco-ferruginous protervus Sm. 119 

 b 10 . Legs black hirbyi 124 



b 7 . Abdomen marked with yellow. 

 a 8 . AbJomen elongate or fusiform. 



a. 9 . Second ventral segment of the abdomen 

 with a tubercle on each side. 



tuber •culiventris Westw. 125 

 b'\ The ventral segments without tubercles. 



