HYMENOPTERA. 51 



172. THYNNUS TARSATUS. 



Thynntis tarsatus, King, Berl. AbhandL (1842) 39. 54<?. 

 Hab. Brazil. 



173. THYNNUS PHILANTHOIDES. 



Thyrmus philanthoides, King, Berl. Abhandl (1842) 40. 55. 



f.9c?. 

 Hab. Brazil (Porto Alegre). 



174. THYNNUS SCUTELLARIS. 



Thynnus scutellaris, King, Berl. Abhandl. (1842) 40. 56 $ . 

 Hab. Brazil (St. Joao del Key). 



175. THYNNUS L^TUS. 



Thynnus Isetus, King, Berl AbhandL (1842) 41. 58. f. 10 $ . 

 Hab. Chili. 



176. THYNNUS ELEGANS. 



Male. Length 9 lines. Black, variegated with yellow : the 

 mandibles, clypeus, face on each side of it, and a broad stripe 

 behind the eyes, yellow. The anterior and posterior margins 

 of the prothorax, a large oblong macula beneath the wings, the 

 scutellum, post-scutellum, and metathorax, yellow; the legs 

 pale ferruginous, the" femora yellow beneath, above black ; wings 

 slightly coloured, with a fuscous cloud occupying the apex of 

 the marginal and the third submarginal cells. Abdomen : the 

 basal segment yellow, with a black line down the middle, the 

 following segments with a large ovate macula on each side ; the 

 head and thorax with confluent punctures ; the abdomen with 

 close, fine, shallow punctures. 



Hab. South America. 



177. THYNNUS DECORUS. B.M. 

 Male. Length 6 lines. Black, shining, and punctured through- 

 out ; not very closely so : the clypeus, mandibles, inner orbits of 

 the eyes, and an abbreviated line behind them, yellow. The an- 

 terior and posterior margins of the prothorax yellow, the former 

 slightly, the latter widely interrupted ; the tegulse, an irregu- 

 larly-shaped spot beneath the wings, a spot on the disk of the 

 mesothorax, a lunate one on the scutellum, the post-scutellum 

 and a spot on each side, and a large curved spot on each side of 

 the metathorax nearly meeting in the middle, yellow; wings 

 hyaline and iridescent, with a dark fuscous cloud in the marginal 



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