hymenoptera. 51 



1/2. Thynnus tarsatus. 



Thynnus tarsatus, Klug, Berl. Abhandl. (1842) 39. 54 J. 



Hab. Brazil. 



173. Thynnus philanthoides. 



Thynnus philanthoides, Klug, Berl. Abhandl (1842) 40. 55. 

 f.9<J. 



Hab. Brazil (Porto Alegre). 



174. Thynnus scutellaris. 



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

 Hab. Brazil (St. Joao del Rey). 



1/5. Thynnus l^etus. 



Thynnus lsetus, Klug, Berl. Abhandl. (1842) 41. 58. f. 10 $ . 



Hab. Chili. ^ , 



— (LrtX 



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 pro thorax, 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. LengthG 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 tegulae, 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, aud a large curved spot on each side of 

 the metathorax nearly meeting in the middle, yellow ; wings 

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



D 2 



