80 EEVISION OF THE THYNNIDjE OF AUSTRALIA, II., 



a 33 . The disc of the mesonotum and 



scutellum ferruginous, bembeculus. 48 

 6 i2 . The disc of the mesonotum and 

 scutellum black marked with 

 yellow. 

 a 13 . Legs light ferruginous. 



<z 14 . Scutellum rounded at the 



apex. productus. 49 



6 14 . Scutellum narrowly truncate 



at the apex. coloratus. 50 



6 13 . Legs black and fusco-ferruginous. 

 a, 34 . Scutellum narrowly truncate 



at the apex. conjungens. 52 



6 14 . Scutellum broadly truncate 



at the apex, tasmaniensis Sauss. 51 

 b 10 . Abdomen wholly black, pavidus Sm. 61 



b 9 . Abdomen broad, the segments strongly 



constricted, ferruginous. gilberti. 82 



b s . Scutellum strongly elevated in the middle. 

 a 9 . Abdomen elongate-fusiform, black and 

 yellow. 

 a 10 . Abdomen punctured. 



a 11 . Legs ferruginous. cygnorum. 67 



b 1 1 . Legs black and yellow. bipartAtus. 66 



b 10 . Abdomen finely rugose. 

 a 11 . First two abdominal segments 



shining. crabroniformis Sm. 65 



b 11 . Second abdominal segment finely 



rugose. crabroniformis Sm. 



var. opaciventris 65 

 b Q . Abdomen elongate, ferruginous marked 



with white. 

 a 10 . Interantennal prominence not developed. 



excellens Sm. 62 

 b 10 . Interantennal prominence broadly 



V-shaped. excelsus. 6& 



6 5 . With a spine at the apical angles of the fifth or 

 sixth ventral segment. 

 a 6 . The spine on the sixth segment and not on the 

 fifth. 

 a 7 . Clypeus rostrate. eyrensis. 73 



b 7 . Clypeus not rostrate. 



